JPH06325271A - Radiation type fire sensor - Google Patents

Abstract

PURPOSE:To enable a receiver to discriminate what fire sensor is being inspected and tested presently, and to allow another fire sensor without being inspected and tested to maintain an original fire detecting function, and further, to execute inspection and a test as compensating automatically the contamination and the damage of a translucent cover or the deterioration of the sensitivity of a light receiving element in the case that plural fire sensors are inspected and tested successively by a tester. CONSTITUTION:An inspection notification light receiving element 6 to receive the inspection notification optical signal of 500Hz generated from the tester, a transmission control circuit 21 and a signal transmitting.receiving part 22 to receive an inspection start permission signal, etc., and simultaneously, transmit an inspection notification detection signal, etc., the light receiving elements 1L, 2L and 1R, 2R, the internal LEDs 3Lb, 3Lr, 3Rb, 3Rr and the external LEDs 4L, 4R of a sensitivity and contamination testing light source, the lighting circuits 24L, 24R and 23L, 23R of the internal and the external LEDs, and a sensor control circuit 20 to execute the lighting control of the lighting circuit and besides, execute inspecting and testing operation by controlling so as to be capable of operating of operating an amplifier 19 by the inspection start permission signal are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiant fire detector for detecting a fire by detecting radiant light emitted from a flame, and in particular, a radiant fire detector having a function of inspecting a fire detecting operation by an inspection tester. Regarding vessels.

[0002]

2. Description of the Related Art Conventionally, as a radiation type fire detector, a constant radiation type that detects when the radiant energy of a specific wavelength band emitted from a flame has reached a certain amount or more, a flicker that detects a flicker peculiar to a flame There are various formulas, such as a two-wavelength formula and a three-wavelength formula, which compare the magnitudes of radiant energy in a plurality of wavelength bands. In many of these radiant fire detectors, radiant light such as ultraviolet rays and infrared rays emitted from the flame is detected by a light receiving element (eg, photodiode, pyroelectric element, discharge tube, etc.).

A transparent cover made of dust-proof transparent glass, an optical filter, or the like is provided on the front surface of the light receiving element, and radiant light from the flame passes through the transparent cover to reach the light receiving element. A structure that allows light to be received, but blocks the passage of foreign matter, moisture, gas, etc. from the outside (eg, airtight structure)
In many cases, the light receiving element and the internal fire detection circuit are protected.

A tester for conducting an inspection test of the radiant fire detector is, for example, a pseudo flame light having the same wavelength band as the radiant light emitted from the flame and the same frequency band as the fluctuation peculiar to the flame. A light source for generating the light is provided.
A maintenance person turns on the power of the tester to generate the pseudo flame light, causes the tester to approach the inspected fire sensor, and irradiates the light receiving element in the fire sensor with the pseudo flame light. Then, based on the detection signal of the light receiving element, it is possible to test whether or not the fire detector normally performs the fire detecting operation.

[0005]

For example, when installing a fire detector in a tunnel, generally, in a tunnel,
A plurality of or a plurality of fire detectors are set such that the respective fire detection areas are somewhat overlapped. And a receiver that manages all information is installed in a slightly remote central control room,
Each fire detector is often connected to the receiver via a common signal transmission line. When the number of fire detectors increases or the signal transmission line becomes long, a single or multiple repeaters are installed in the middle of the signal transmission line to amplify and relay signals during transmission. In some cases. Figure 14
It is a figure showing an example of a plurality of fire detectors installed in a tunnel, and a receiver connected via a signal transmission line. In the figure, T1 to Tn are # 1 to #n fire detectors, respectively, and n is a number such as 32 or 64.

Further, each of the n fire detectors is given an address number in advance so that it can be identified and the corresponding sensing area can be identified. When each fire detector detects a flame, Both the own address number and the fire detection signal are transmitted to the receiver, and the receiver specifies the address number to call the desired fire detector. When maintenance personnel perform inspection tests on fire detectors using the tester, they are not necessarily performed in the order of address numbers, and the addresses of fire detectors are provided in order due to replacement of devices that occur during use. Not necessarily.

Therefore, the receiver side that receives the flame detection signal from the inspection test needs to know which fire detector is currently being tested. Conventionally, the maintenance staff at the installation location of the fire detector receives it. There was a problem that it was necessary to inform the maintenance staff on the aircraft side of the number of fire detectors to be tested with a transceiver or the like. From the start to the end of the inspection test, the receiver processes the flame detection signals from all of the flame detectors as a flame detection signal based on the pseudo flame signal in the inspection mode. During the inspection test of one fire detector, even if another fire detector reports a flame detection signal based on the actual occurrence of a fire to the receiver, the receiver that receives this message detects the flame detected by the inspection test. There was a problem that it was processed as a signal. Furthermore, if the light-transmitting cover provided on the front surface of the light-receiving element becomes dirty and the light transmittance decreases, or if the light-receiving sensitivity of the light-receiving element deteriorates, the inspection test may determine that the device has failed. It is necessary to clean the light-transmitting cover and manually compensate the light-receiving sensitivity before carrying out, and there is also a problem that much work time is required for the inspection test.

The present invention has been made in order to solve such a problem, and when the inspection test of a plurality of fire detectors is sequentially performed by a tester, it is received which fire detector is currently undergoing the inspection test. Other fire detectors that can identify the machine and are not undergoing inspection tests can maintain the original flame detection function, and automatically compensate for contamination of the translucent cover and sensitivity deterioration of the light receiving element. The purpose is to obtain a radiant fire sensor that can be used for inspection tests.

[0009]

A radiant fire detector according to claim 1 of the present invention comprises a light receiving element for receiving radiant light emitted from a flame or pseudo flame light emitted from a tester.
In a radiant fire detector having a fire detecting means based on a detection signal of the light receiving element, when a test test of the fire detecting means is performed by irradiating the light receiving element with pseudo flame light from the tester, In order to inform the radiation sensor that an inspection test is in progress, light, electromagnetic waves, or ultrasonic waves having a pulse or a different wavelength from the pseudo flame light generated from the inspection notification signal generating means provided in advance in the tester. , Or magnetic force, the inspection notice signal detecting means for detecting the inspection notice signal in a non-contact manner, and the inspection notice signal detected by the inspection notice signal detecting means, the receiver or the relay to be notified in case of fire detection. It is provided with a transmitting means for transmitting to a container or the like.

According to a second aspect of the present invention, there is provided a radiant fire detector which comprises a light receiving element for receiving radiant light emitted from a flame or pseudo flame light emitted from a tester, and a fire based on a detection signal from the light receiving element. In a radiant fire detector having a sensing means, when performing a test test of the fire sensing means by irradiating the light receiving element with pseudo flame light from the tester, it is said that the test tester is under test. In order to inform the sensor of type, when the fixed or movable protrusion provided in advance on the tester is brought into contact with the recess of the corresponding radiation sensor, the contact of the protrusion is detected as an inspection notification signal. An inspection notification signal detection means and a transmission means for transmitting the inspection notification signal detected by the inspection notification signal detection means to a receiver or a repeater to be notified when a fire is detected. It is intended.

The radiation type fire detector according to claim 3 of the present invention comprises a receiving means for receiving and detecting an inspection start permission signal for permitting the start of the inspection test by the tester transmitted from the receiver or the repeater. The signal detection operation control means for controlling the inspection notification signal detection means from the inoperable state to the operable state based on the inspection start permission signal received and detected by the receiving means. It is added to the radiant fire detector according to 2.

According to a fourth aspect of the present invention, there is provided a radiant fire detector, which comprises a receiving means for receiving and detecting an inspection start permission signal for permitting the start of the inspection test by the tester transmitted from the receiver or the repeater. A signal detection operation control means for controlling the inspection notification signal detection means from an inoperable state to an operable state based on the inspection start permission signal received and detected by the receiving means, and an inspection start received and detected by the receiving means When the signal detection operation control means controls the inspection notification signal detection means to the operable state based on the permission signal, the fire detection means receives the radiant light from the flame or the pseudo flame light emitted from the tester. Then, when performing the flame detection operation, depending on whether or not the inspection notification signal detecting means detects the inspection notification signal, whether the fire is detected by the pseudo flame light or the actual flame is detected. Radiant fire detection according to claim 1 or claim 2 of the present invention, and an operation determination and transmission means for determining whether the fire is detected or not, and transmitting the determination result to a receiver or a repeater which should make the notification. It is added to the container.

A radiant fire sensor according to a fifth aspect of the present invention is the radiant fire sensor according to any one of the first to fourth aspects of the present invention, wherein the pseudo flame light is received from the tester. When the inspection test of the fire detection means is performed by irradiating the element, in order to perform the inspection test by compensating the sensitivity deterioration of the light receiving element, the light receiving element for the light receiving sensitivity test of the light receiving element and the light receiving element are received. A light-receiving sensitivity test means that lights up during the sensitivity test to emit a light-receiving sensitivity test light, and the light-receiving sensitivity test light thus emitted is irradiated to the light-receiving element, and the detection signal level of the light-receiving element is measured, and the measured value is obtained. A light receiving sensitivity calculating means for calculating the light receiving sensitivity of the light receiving element based on the light receiving sensitivity, and a light receiving sensitivity determining means for determining whether or not the calculated value of the light receiving sensitivity is equal to or more than a lower limit value of a preset light receiving sensitivity allowable range, The light receiving feeling When the determination result of the determination means is affirmative, the amplification degree of the amplifier for amplifying the output of the light receiving element is changed or the threshold value for detecting fire is changed according to the calculated value of the light receiving sensitivity. The light-receiving sensitivity automatic compensating means including the light-receiving sensitivity compensating means for compensating the deterioration of the light-receiving sensitivity is provided.

A radiant fire sensor according to a sixth aspect of the present invention is the radiant fire sensor according to any one of the first to fourth aspects of the present invention, wherein radiant light emitted from the flame or A light-transmitting cover that transmits the pseudo flame light emitted from the tester and allows the light receiving element to receive the transmitted light is provided, and the pseudo flame light is transmitted from the tester to the light receiving element through the light transmitting cover. When performing the inspection test of the fire detection means, in order to perform the inspection test while compensating for the contamination of the translucent cover, a light emitting element provided outside the cover for the contamination test of the translucent cover. , A pollution test means that lights up the light emitting element at the time of a pollution test to emit a pollution test light, and the emitted pollution test light is transmitted through the translucent cover to irradiate the light receiving element, Measure the detection signal level, Extinction ratio calculating means for calculating the extinction ratio of the translucent cover based on the measured value, and whether or not the calculated value of the extinction ratio is equal to or greater than the lower limit value of the preset extinction ratio allowable range. And the degree of contamination of the amplifier that amplifies the output of the light receiving element is changed according to the calculated value of the extinction ratio when the determination result of the degree of contamination determination unit is positive. , Or a stain compensating means for compensating the stain of the transparent cover by changing the threshold value for detecting a fire.

A radiant fire sensor according to a seventh aspect of the present invention is the radiant fire sensor according to any one of the first to fourth aspects of the present invention, wherein radiant light emitted from the flame or A light-transmitting cover that transmits the pseudo flame light emitted from the tester and allows the light receiving element to receive the transmitted light is provided, and the pseudo flame light is transmitted from the tester to the light receiving element through the light transmitting cover. When performing the inspection test of the fire detecting means, the inspection test is performed by compensating the contamination of the translucent cover and the sensitivity deterioration of the light receiving element. A light-emitting element provided on the outside of the cover, a stain test means for lighting the light-emitting element during a stain test to emit stain test light, and the emitted stain test light passing through the light-transmitting cover to Irradiate the light receiving element, An extinction ratio calculating unit that measures a detection signal level of an optical element and calculates an extinction ratio of the translucent cover based on the measured value, and an extinction ratio in which a calculated value of the extinction ratio is preset. A stain degree determining unit that determines whether or not the value is equal to or more than the lower limit value of the allowable range, and if the determination result of the stain degree determining unit is affirmative, the output of the light receiving element is output according to the calculated value of the extinction ratio. A stain compensating means for compensating for stains on the translucent cover by changing the amplification degree of an amplifier for amplifying the light or changing a threshold value for detecting a fire, and an automatic compensating means for stains, A light emitting element provided inside the translucent cover for a light receiving sensitivity test of the element, a light receiving sensitivity testing means for lighting the light emitting element during the light receiving sensitivity test to emit a light receiving sensitivity test light, and the light emitting element. Irradiate the light-receiving element with test light Light receiving sensitivity calculation means for measuring the detection signal level of the light receiving element and calculating the light receiving sensitivity of the light receiving element based on the measured value, and the calculated value of the light receiving sensitivity is not less than the lower limit value of the preset light receiving sensitivity allowable range. And a degree of amplification of an amplifier that amplifies the output of the light receiving element according to the calculated value of the light receiving sensitivity when the result of the determination by the light receiving sensitivity determining means is affirmative. Or a threshold for detecting a fire is changed, and a light receiving sensitivity compensating means for compensating for the deterioration of the light receiving sensitivity is provided.

[0016]

In the invention according to claim 1, it has a light receiving element for receiving the radiant light emitted from the flame or the pseudo flame light emitted from the tester, and the fire sensing means based on the detection signal of the light receiving element. In a radiant fire detector, when performing a test test of the fire sensing means by irradiating the light receiving element with pseudo flame light from the tester, the check notification signal detecting means indicates that the test test is being performed by the tester. In order to notify the corresponding radiation type sensor, any one of light, electromagnetic wave, ultrasonic wave, or magnetic force different in pulse or different wavelength from the pseudo flame light generated from the inspection notification signal generating means provided in advance in the tester. Non-contact detection of inspection notification signal. The transmitting means transmits the inspection notification signal detected by the inspection notification signal detecting means to a receiver or a repeater which should be notified when a fire is detected.

According to the second aspect of the present invention, there is provided a light receiving element for receiving the radiant light emitted from the flame or the pseudo flame light emitted from the tester, and the fire detecting means based on the detection signal of the light receiving element. In radiant fire detectors,
When performing the inspection test of the fire detection means by irradiating the light receiving element with pseudo flame light from the tester, the inspection notification signal detection means informs the corresponding radiation type sensor that the inspection test by the tester is under way. Therefore, when a fixed or movable protrusion provided in advance on the tester is brought into contact with the recess of the radiation sensor, the contact of the protrusion is detected as an inspection notification signal. The transmitting means transmits the inspection notification signal detected by the inspection notification signal detecting means to a receiver or a repeater which should be notified when a fire is detected.

In the invention according to claim 3, a receiving means and a signal detecting operation control means are added to the invention according to claim 1 or 2, and the receiving means is transmitted from a receiver or a repeater. An inspection start permission signal for permitting the start of the inspection test by the tester is received and detected. The signal detection operation control means controls the inspection notification signal detection means from the inoperable state to the operable state based on the inspection start permission signal received and detected by the receiving means.

In the invention according to claim 4, a receiving means, a signal detecting operation control means, and an operation determining and transmitting means are added to the invention according to claim 1 or 2.
The receiving means receives and detects an inspection start permission signal transmitted from the receiver or the repeater, which permits the start of the inspection test by the tester. The signal detection operation control means, based on the inspection start permission signal received and detected by the receiving means,
The inspection notification signal detecting means is controlled from an inoperable state to an operable state. The operation determination and transmission means is based on the inspection start permission signal received and detected by the reception means, and when the signal detection operation control means controls the inspection notification signal detection means to an operable state, the fire detection means is When the radiant light from the flame or the pseudo flame light emitted from the tester is received and the flame sensing operation is performed, whether the inspection notification signal detection means detects the inspection notification signal or not Whether a fire is detected or a fire caused by an actual flame is discriminated, and the discrimination result is transmitted to a receiver or a repeater which should make the notification.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the automatic compensating means for the light receiving sensitivity is a light receiving element for light receiving sensitivity test, a light receiving sensitivity testing means, and a light receiving sensitivity. The light receiving sensitivity test means includes a calculating means, a light receiving sensitivity determining means, and a light receiving sensitivity compensating means. The light receiving sensitivity test means illuminates the light receiving sensitivity test light emitted by turning on the light receiving element for the light receiving sensitivity test during the light receiving sensitivity test. The light receiving sensitivity calculation means measures the detection signal level of the light receiving element and calculates the light receiving sensitivity of the light receiving element based on the measured value.
The light receiving sensitivity determining means determines whether or not the calculated value of the light receiving sensitivity is equal to or higher than the lower limit value of the preset light receiving sensitivity allowable range. The light receiving sensitivity compensating means changes the amplification degree of the amplifier for amplifying the output of the light receiving element or detects a fire in accordance with the calculated value of the light receiving sensitivity when the result of the light receiving sensitivity judging means is affirmative. The threshold value to be changed is changed to compensate the deterioration of the light receiving sensitivity. When the fire detector is irradiated with pseudo flame light from the tester to perform the inspection test of the fire detection means, the inspection test is performed by compensating the deterioration of the light reception sensitivity by the automatic compensation means of the light reception sensitivity.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the translucent cover is radiant light emitted from the flame or a pseudo flame emitted from a tester. Light is transmitted, and the transmitted light is received by the light receiving element. The automatic stain compensation means includes a light emitting element for stain test of the translucent cover, a stain test means, a light reduction rate calculation means, a stain degree determination means, and a stain compensation means.
The pollution test light-emitting element is provided outside the translucent cover. The stain test means turns on the stain test light emitting element during the stain test, and irradiates the light receiving element with the stain test light emitted and transmitted through the translucent cover. The extinction ratio calculation means measures the detection signal level of the light receiving element, and calculates the extinction ratio of the translucent cover based on the measured value. The stain degree determining means determines whether or not the calculated value of the light extinction ratio is equal to or higher than the lower limit value of the preset light extinction allowable range. When the determination result of the contamination degree determination means is affirmative, the pollution compensation means changes the amplification degree of the amplifier for amplifying the output of the light receiving element or detects a fire according to the calculated value of the extinction ratio. The threshold value to be changed is changed to compensate for the contamination of the translucent cover. Then, when performing pseudo-flame light from the tester through the light-transmitting cover and irradiating the light-receiving element to perform an inspection test of the fire detecting means, the stain-proof automatic compensating means compensates for stains on the light-transmitting cover. And conduct an inspection test.

According to a seventh aspect of the present invention, in the invention according to any one of the first to fourth aspects, the translucent cover is a radiation flame emitted from the flame or a pseudo flame emitted from a tester. Light is transmitted, and the transmitted light is received by the light receiving element. The automatic stain compensation means includes a light emitting element for stain test of the translucent cover, a stain test means, a light reduction rate calculation means, a stain degree determination means, and a stain compensation means.
The pollution test light-emitting element is provided outside the translucent cover,
The stain test means turns on the stain test light emitting element during the stain test, and irradiates the light receiving element with the stain test light emitted and transmitted through the translucent cover. The extinction ratio calculation means measures the detection signal level of the light receiving element, and calculates the extinction ratio of the translucent cover based on the measured value. The stain degree determining means determines whether or not the calculated value of the light extinction ratio is equal to or higher than the lower limit value of the preset light extinction ratio allowable range. When the determination result of the contamination degree determination means is affirmative, the pollution compensation means changes the amplification degree of the amplifier for amplifying the output of the light receiving element or detects a fire according to the calculated value of the extinction ratio. The threshold value to be changed is changed to compensate for the contamination of the translucent cover. The light receiving sensitivity automatic compensating means includes a light receiving sensitivity testing light emitting element, a light receiving sensitivity testing means, a light receiving sensitivity calculating means, a light receiving sensitivity discriminating means, and a light receiving sensitivity compensating means, and the light receiving sensitivity testing light emitting element is provided inside the translucent cover. It is provided in. The light receiving sensitivity test means illuminates the light receiving element for light receiving sensitivity test by illuminating the light emitting element for light receiving sensitivity test during the light receiving sensitivity test. The light receiving sensitivity calculation means measures the detection signal level of the light receiving element and calculates the light receiving sensitivity of the light receiving element based on the measured value. The light receiving sensitivity determining means determines whether or not the calculated value of the light receiving sensitivity is equal to or higher than the lower limit value of the preset light receiving sensitivity allowable range. The light receiving sensitivity compensating means changes the amplification degree of the amplifier for amplifying the output of the light receiving element or detects a fire in accordance with the calculated value of the light receiving sensitivity when the result of the light receiving sensitivity judging means is affirmative. The threshold value to be changed is changed to compensate the deterioration of the light receiving sensitivity. Then, when performing pseudo-flame light from the tester through the light-transmitting cover and irradiating the light-receiving element to perform an inspection test of the fire detecting means, the stain-proof automatic compensating means compensates for stains on the light-transmitting cover. In addition, the inspection test is performed by compensating the deterioration of the light receiving sensitivity by the light receiving sensitivity automatic compensating means.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a radiation type fire detector showing an embodiment of the present invention. 2 is a structural view of the radiant fire detector of FIG. 1, and FIG. 2 (a) is a plan view thereof,
(B) has shown the sectional view. 3 is a diagram showing two sensing areas on the left side and the right side of the radiant fire detector of FIG. 1, and FIG. 4 is a diagram of the light receiving element and the internal light emitting diode (LE) of FIG.
It is a figure which shows the positional relationship with D).

First, it will be explained that a single fire sensor can have multiple sensing areas. When the radiant fire detector of the embodiment of FIG. 1 is installed on a wall surface, for example, the central axis is 45 degrees to the left and right with respect to the front direction (direction perpendicular to the wall surface) of the fire sensor. It has three almost independent fire sensing areas in three-dimensional space. FIG. 3 shows the left and right sensing areas in a horizontal plane when the radiant fire detector of FIG. 1 is installed on a wall surface,
For example, the sensing area can be up to about 50 meters in a linear distance perpendicular to the light receiving surface of the light receiving element.
The radiant light emitted from the flames in the sensing areas on the left and right sides of FIG. 3 are respectively received by the light receiving elements arranged such that the light receiving directional characteristics thereof match the sensing area in each direction.

1 to 4, 1L and 1R are blue light components (for example, wavelengths of 0.6 to 0.7) of infrared light emitted from flames generated in the left and right sensing areas, respectively.
It is a blue light receiving element for separately receiving a component of about 5 μm, which is also referred to as a short wavelength component in the present invention). In this embodiment, both photodiodes are used. 2L, 2R
Is a red light component (for example, a component having a wavelength of about 0.8 to 2 μm) in the infrared light emitted from the same flame generated in each of the left and right sensing areas, and is a long wavelength component in the present invention. Red light receiving element for separately receiving light), and in this embodiment, a pyroelectric element (an element that generates a voltage or a pyroelectric current when infrared rays are absorbed to cause a temperature change) is used together. The photodiode 1L and the pyroelectric element 2L serve as a light receiving element in the left sensing area of FIG. 3, and the photodiode 1R and the pyroelectric element 2R serve as a light receiving element in the right sensing area of FIG. The light component is detected separately.

3Lb and 3Lr are blue light receiving photodiodes 1 on the left side, respectively, when performing a light receiving sensitivity test.
L and the left side red light receiving pyroelectric element 2L are separately irradiated, so that red light in the same band as the flame flashes and emits at a flame fluctuation frequency of about 8 to 12 Hz.
In this embodiment, a light emitting diode is used, and it is provided inside the light receiving glass 7. Similarly, 3Rb, 3Rr
When the light sensitivity test is performed, the red light in the same band as the flame that separately illuminates the right blue light receiving photodiode 1R and the right red light receiving pyroelectric element 2R blinks at about 8 to 12 Hz. The second test light-emitting element for the right side, which emits light, is provided inside the light-receiving glass 7 in this embodiment, and is hereinafter referred to as the right-side internal LED. Internal LED3 on the left or right side
The positional relationship between Lb, 3Lr, 3Rb, 3Rr and the photodiodes 1L, 1R and the pyroelectric elements 2L, 2R which are light receiving elements is such that direct irradiation is performed as shown in FIG. 4 in this embodiment. ing. Instead of direct irradiation, the inner surface of the light receiving glass or the photodiode 1L,
Irradiation, that is, indirect irradiation, may be performed by reflecting the light on the inner surfaces of the optical filters provided on the front surfaces of 1R and the pyroelectric elements 2L and 2R.

4L and 4R are provided outside the light-receiving glass 7 to test the degree of contamination (specifically, the light transmittance) of the left and right light-transmitting portions of the light-receiving glass 7, and are provided with flames. The red light in the same band as
The first and second light-emitting elements for the first test for flashing and emitting light at a frequency of Hz, and at the time of a stain level test, the pseudo-light of the flame emitted from the left-side or right-side direction is received by the light-receiving glass 7 respectively. The photodiode 1L on the left side and the photodiode 1R on the right side, which are inside, are separately illuminated. In this embodiment, a light emitting diode is used as a light emitting element, which will be hereinafter referred to as left and right external LEDs.

Reference numerals 5L and 5R are operation / fire indicator lights on the left side and the right side, respectively.
A color LED is used, a green LED is used as an operation indicator, and a red LED is used as a fire indicator. The display state by the two-color LED is performed based on the instruction of the receiver which transmits the flame detection signal to the receiver by the fire detector and receives the flame detection signal. In this embodiment, the flame is first displayed. Flashing lighting by the green LED is detected, and flashing lighting by the red LED is carried out when the second continuous flame after the initial detection signal is restored (reset) by the receiver is detected. After the continuous flame detection signal is confirmed three or more times by the receiver, the red LED continuously lights. In addition to the above three display states, the two-color LED display mode is often combined with flashing lighting (the flashing frequency may be low or high) and continuous lighting or extinction for each of the two LEDs. Possible display modes are. Table 1 below shows an example of the display mode.

[0029]

[Table 1]

In this embodiment, when the fire detector receives the irradiation light from the pseudo-flame light source of the inspection tester to conduct the inspection test, the fact that the inspection test by the tester is underway is concerned. In order to inform the
For example, it emits light that blinks at about 500 Hz. Reference numeral 6 is a light receiving element for the inspection notification signal generated from this tester, which is a photodiode for receiving the light blinking at about 500 Hz in this example. The inspection tester will be described with reference to FIGS. 6 and 7. Reference numeral 7 denotes a light-receiving glass as a light-transmitting cover, which transmits a flame signal when a fire occurs through the light-receiving glass 7 and is received by the photodiodes 1L, 1R and the pyroelectric elements 2L, 2R. 8L and 8R are the external LED 4L on the left side and the operation / fire indicator lamp 5L, respectively.
And a transparent glass provided on the right external LED 4R and the operation / fire indicator light 5R. 9A and 9B are case A and case B of this fire detector, respectively.

Reference numerals 11L and 11R in FIG. 1 are preamplifiers for amplifying the light receiving output signals of the photodiodes 1L and 1R, respectively, and 12L and 12R are pyroelectric elements 2L and 2R, respectively.
Preamplifier for amplifying the received light output signal of
R, 14L and 14R are preamplifiers 11L and 11L, respectively.
An amplifier that amplifies the output signals of R, 12L, and 12R. Here, the preamplifiers 11L, 11R, 12L, 1
Since the 2R and the amplifiers 13L, 13R, 14L, and 14R amplify only the flame signal of Mako among the output signals obtained from the respective light receiving elements, for example, an alternating current of about 8 to 12 Hz, which is the fluctuation frequency band of the flame at the time of fire. It is designed so that only the signal is extracted and amplified by a built-in band pass filter (BPF). For example, it is designed as a narrow band amplifier incorporating an active filter, a direct current component of an input signal and a high band component of about 12 Hz or more are attenuated, and only the narrow band signal is amplified.

Further, the preamplifier 11L and the amplifier 13L, 1
The two-stage amplifier circuit consisting of 2L and 14L, 11R and 13R, or 12R and 14R has high gain and high sensitivity, so even in the case of a distant or small fire where the radiant energy of the fire is small, sufficient measurement values can be obtained. Is used as a circuit to obtain. Since the amplifier circuit including only the preamplifier 11L, 12L, 11R, or 12R has a low gain and low sensitivity, the output of the amplifier circuit does not saturate even when the radiant energy of a fire is large and the measured value is correct. Is used as a circuit to obtain. 15L-18L and 15R-
18R is a smoothing circuit, which is composed of, for example, a resistor and a capacitor, receives the output signal of the preamplifier or the amplifier, outputs a smoothed signal of the input signal, and supplies the smoothed signal to the sensor control circuit 20.

The sensor control circuit 20 selects either the output of the smoothing circuit to which the preamplifier output is input or the output of the smoothing circuit to which the amplifier output is input, according to the magnitude of the radiant light energy of the fire. Further, by controlling the amplification degree of the preamplifier or the amplifier, the signal value in the linear region in which the light reception signal level exists between the minute level and the saturation level is measured. Reference numeral 19 is an amplifier for amplifying the output signal of the inspection notification signal light-receiving element 6, but it is not always operable, and when the fire detector receives an inspection start permission signal from an external receiver or repeater, sensor control is performed. It is an amplifier that is set from an inoperable state to an operable state by the circuit 20.

A sensor control circuit 20 and a transmission control circuit 21 each include a microprocessor MPU, a plurality of read only memory ROMs, a plurality of random access memory RAMs, an input / output (I / O) interface, and the like. It is built-in.

FIG. 5 is a configuration block diagram showing an example of the sensor control circuit of FIG. In FIG. 5, MPU1 and R
The OM1 to ROM9, the RAM1 to RAM6 and the I / O interface are coupled to each other via a data bus and an address bus. And in this embodiment, RO
M1 is a storage area for the control program, ROM2 is a storage area for the normal range reference value of the received light output signal obtained through the light receiving element and the amplifier, ROM3 is a storage area for the correctable range threshold value of the light receiving element alone, and ROM4 is the light receiving area. A storage area for a threshold value of a stain-correctable range of a received light output signal obtained via an element and an amplifier, a ROM 5 storage area for a reference value of extinction ratio, a ROM 6 storage area for a threshold value for fire judgment, and RO
M7 is a read-only memory assigned to a storage area for address codes, type codes, etc., assigned to each fire detector for identifying a plurality of fire detectors, and a ROM 8 for each of the other auxiliary storage areas.

RAM 1 is a data work area, RAM
2 is an area for storing the extinction ratio data, RAM 3 is an area for storing a light receiving sensitivity calculated value of the light receiving element alone, RAM 4 is an area for storing a light receiving output value from the light receiving sensor, RAM 5 is a timer area, RA
M6 is a readable / writable memory assigned to each of the other auxiliary storage areas. The I / O interface is
It contains an A / D converter, a multiplexer, an output port, an input port, etc. inside. This multiplexer selects an analog input signal from the smoothing circuits 15L to 18L and 15R to 18R and the amplifier 19 and supplies the analog input signal to the A / D converter.
The / D converter converts this into digital data to enable digital signal processing within the sensor control circuit. The output port outputs a lighting control signal to, for example, the lighting circuit, and the input port receives data from the transmission control circuit 21, for example. The I / O interface includes preamplifiers 11L, 11R, 12L, 12R and an amplifier 1
Although an output port and the like for controlling the amplification degree of 3L, 13R, 14L, and 14R are also provided, they are not shown.

Reference numeral 22 denotes a signal transmission / reception unit, which includes a reception circuit, a data serial / parallel conversion circuit, a transmission circuit, and a data parallel / parallel circuit.
It is composed of a serial conversion circuit or the like, and transmits / receives data to / from a receiver or a repeater via a signal transmission line under the control of the transmission control circuit 21. 23L and 23R are based on the output signal from the sensor control circuit 20, respectively, and
Lighting circuit for controlling lighting of L and 4R, 24L and 24R
Is also a lighting circuit that controls lighting of the internal LEDs 3Lb, 3Lr and 3Rb, 3Rr based on output signals from the sensor control circuit 20, respectively.

25L and 25R are based on the output signals from the sensor control circuit 20, respectively, and the operation / fire indicator lamp 5
It is a lighting control circuit for controlling lighting of L and 5R (including continuous lighting and flashing lighting). Clock circuits 26 and 27 both generate respective clock signals and supply them to the sensor control circuit 20 and the transmission control circuit 21. Reference numerals 28 and 29 are reset circuits, which generate reset signals by initial operation after power-on and by manual operation, and supply them to the sensor control circuit 20 and the transmission control circuit 21.

6A and 6B are external views showing an example of a tester for inspecting a fire detector. FIG. 6A is a side view and FIG. 6B is a front view. In FIG. 6, 31L, 31R
Are the fluctuating frequencies of the flame in the infrared light band of the flame of approximately 8 to 8 as the left and right pseudo flame signals, respectively.
Light-emitting element that emits light at 12 Hz (eg, light-emitting diode)
Is. In addition, 32 is an inspection notification signal for the purpose of informing the fire detector of the fact that an inspection test is in progress while inspecting a fire detector by this inspection tester.
The light emitting element emits light at a frequency higher than the fluctuation frequency of the flame (about 500 Hz in this embodiment). Further, as shown in FIG. 6A, the inspection tester is provided with a switch for selecting one of the three positions of left side (L), right side (R), and both left and right (center position). , 8 to 1
Either one of the 2 Hz light emitting element 31L or 31R,
Alternatively, both can be selected to emit light. In the following example, the case where the inspection test is performed on each of the left side (L) and the right side (R) will be described.

FIG. 7 is a diagram showing the positional relationship between the fire detector and the inspection tester at the time of inspection. In FIG. 7, at the time of inspection, the front surface of the inspection tester is pressed until it covers the light-receiving glass 7 of the fire detector. As a result, the light emitted from the light emitting element 31L or 31R for 8 to 12 Hz is received by the photodiode 1L and the pyroelectric element 2L or the photodiode 1R and the pyroelectric element 2R, respectively.
The light emitted from the 0 Hz light emitting element 32 is received by the inspection notification signal light receiving element 6.

When the fire detector receives the inspection start permission signal from the external receiver or the repeater and the amplifier 19 is already set to the operable state by the sensor control circuit 20, the inspection notification signal is sent. The output signal of the light receiving element 6 is amplified by the amplifier 19 and supplied to the sensor control circuit 20. Therefore, the sensor control circuit 20 is informed by the inspection notification signal that its own fire detector is currently undergoing an inspection test by the tester. Is recognized and the inspection flag described later is turned on. Further, when the inspection flag is turned on or off, the sensor control circuit 20 detects a pseudo flame signal or detects a flame signal due to an actual fire when the flame is detected based on the detection signal of the light receiving element. It is determined whether or not the detailed description will be given with reference to the flowcharts of FIGS. 12 and 13.

In the inspection tester of FIG. 6, the 500 Hz light emitting element 32 is used as the inspection notification signal generating means.
However, the present invention is not limited to this. As the inspection notification signal generating means, for example, an electromagnetic wave or an ultrasonic wave in a high frequency band is modulated by a pulse of a predetermined code or the like and transmitted, and when the tester comes close to the tester, the transmitted electromagnetic wave or The ultrasonic wave may be received via the built-in antenna or wave receiver and the pulse of the predetermined code or the like may be decoded to recognize that its own device is currently undergoing an inspection test by a tester. The technique for transmitting and receiving the coded pulse or the like at the short distance is a well-known technique widely used for a remote controller of a television or a VTR, and a detailed description thereof will be omitted.

As the inspection notification signal generating means, for example, an electromagnet or the like may be used to generate a magnetic force. In this case, an element sensitive to the magnetic force such as a reed switch is provided in advance in the fire detector so as to be in a very short distance. When the tester is brought close to the fire detector, the contact of the reed switch is turned on and the inspection notification signal can be detected.

Further, the inspection notification signal generating means may be, for example, a fixed or movable projecting portion or a rod-shaped member provided in advance at a predetermined position of the tester. In this case, a microswitch or the like that operates when pressed in advance is provided in the recessed portion (or recessed portion) at the position corresponding to the projecting portion or the rod-shaped member of the fire detector, and the projecting portion of the tester is provided. Alternatively, a part or a rod-shaped member may be inserted into the depressed portion of the fire detector and the spring of the microswitch may be pressed to turn on the contact of the microswitch. As described above, the inspection notification signal generating means may be a non-contact type or a contact type.

In the above embodiment, the 500 Hz light emitting element 32 provided in the tester is an example of the inspection notification signal generating means, and the inspection notification signal light receiving element 6 and the amplifier 19 are provided.
The sensor control circuit 20 is an example of the inspection notification signal detecting means. The transmission control circuit 21 and the signal transmission / reception unit 22 are examples of transmission means or reception means, and the sensor control circuit 2
Reference numeral 0 is an example of signal detection operation control means, and is also an example of determination operation means for determining whether fire detection by a pseudo flame light source or fire detection by an actual flame is performed. The sensor control circuit 20, the transmission control circuit 21, and the signal transmission / reception unit 22 are examples of operation determination and transmission means. Also internal LED 3L
b, 3Lr, 3Rb, and 3Rr are examples of light-emitting elements for a light-sensitivity test, and the external LEDs 4L and 4R are examples of light-emitting elements for a stain test.

Further, MPU1 and RO of the sensor control circuit 20
The M1, ROM2, ROM3 and the lighting circuits 24L, 24R are an example of the photosensitivity testing means, and the MPU1, ROM1, ROM4, ROM5 and the lighting circuit 2 of the sensor control circuit 20.
3L and 23R are examples of the stain test means. In addition, the sensor control circuit 20 MPU1, ROM1, ROM2 and RO
M3 is an example of the light receiving sensitivity determining means, and is also the MPU.
1. ROM1 and ROM4 are an example of a stain degree determination means. Further, the MPU1, ROM1 and ROM2 of the sensor control circuit 20 are an example of the light receiving sensitivity calculating means, and the same MP
U1, ROM1 and ROM5 are examples of the extinction ratio calculation means. In addition, the MPU1, ROM1, and
ROM2 and ROM3 are an example of the light sensitivity compensating means,
Similarly, MPU1, ROM1, ROM4 and ROM5 are examples of the stain compensation means.

FIG. 8 is a flow chart showing the main routine of the control program for the radiation fire detector of FIG.
9 and 10 are flowcharts showing No. 1 and No. 2 of the reception interrupt program of the radiant fire detector of FIG. FIG. 11 is a flow chart showing a test program for the radiant fire detector of FIG. 12 and 13 are flow charts showing No. 1 and No. 2 of the flame detection program of the radiant fire detector of FIG. 8 to 13 below
The operation of the fire detector of FIGS. 1 and 4 will be described with reference to FIG.

In step S31 of FIG. 8, the fire detector performs initial processing after power is turned on. As the initial processing, for example, the RAM data included in the sensor control circuit 20 and the transmission control circuit 21 are cleared and R
Sum check of OM data (check of added value of data), storage of initial data for correction of the light receiving element alone in RAM 3 of FIG. 5, clear of timer, counter, etc., time required for stabilizing amplifier (for example, about 0.5 seconds) The operation such as standby of (about) is performed.

In step S32 of FIG. 8, the sensor control circuit 20 in the fire detector uses the I / O interface of FIG. 5 to smooth the output signal of each light-receiving sensor 15L.
-18L, 15R-18R are read, the value is quantized, and it stores in RAM4. The I / O interface sequentially selects one signal from the eight input signals output from each of the smoothing circuits by a built-in multiplexer on the basis of a command from the MPU 1 and outputs the selected signal to A / O.
Quantization is performed by the D converter, and the quantized data is sequentially RA
The final fire monitoring data is stored in M4 and the calculation for calculating the average value of the stored plural data is performed.

The sampling frequency of the data passed through the A / D converter is preferably at least twice the maximum frequency of flame fluctuation of 12 Hz, for example 25 Hz or more, based on the Nyquist sampling theorem. The sampling cycle is preferably 0.04 seconds or less). Further, the calculation of the average value of a plurality of sampled data eliminates the influence of the maximum value and the minimum value of the sample data and has an integral function, so that it is desirable that the number of sample data is as large as possible. However, since the time allowed from flame generation to fire detection is generally restricted, within the range of this time restriction, it is possible to detect the long-wavelength and short-wavelength light receiving sensors for the left and right sensing areas, respectively. A large number of sample data are collected, the average value of the collected data is calculated, and this value is used as fire monitoring data in each wavelength range.

When the output level of the light receiving sensor is high, the signal passed through the smoothing circuit from the amplifier becomes the saturation level. Therefore, the signal passed through the smoothing circuit is taken in from the preamplifier at the preceding stage, and the linear signal before reaching the saturation level. The signal level in the area is measured.

In step S33 of FIG. 8, the sensor control circuit 20 determines whether or not the correction of the light receiving element alone is necessary. This is the necessity of correction for the photosensitivity of each of the photodiodes 1L, 1R or the pyroelectric elements 2L, 2R that deteriorates over time after use. Therefore, the internal LEDs 3Lb, 3Lr and 3R are set at predetermined intervals.
b, 3Rr are driven to measure the received light output values of the left photodiode 1L and the pyroelectric element 2L and the left photodiode 1R and the pyroelectric element 2R, respectively, and the ratio between the measured value and the reference value at the initial stage of installation is measured. Is calculated as the light receiving sensitivity, and the calculated value is stored in the RAM 3 of FIG.

The calculated value of the light receiving sensitivity has an initial value of 1.00 at the time of installation.
5, 0.90, 0.85 and so on. Therefore, FIG.
The MPU 1 reads the calculated light-reception sensitivity value of the corresponding light-reception sensor in the RAM 3 and outputs it in the normal range (for example, 1.00 to 0.8).
5) It is determined whether or not it is within the normal range stored in the ROM 2, and it is determined that the correction is not necessary, and step S
35, the correction value is determined to be necessary when the value is equal to or lower than the lower limit value of the normal range, and in step S34, the correction value (the reciprocal number of the light receiving sensitivity, the reciprocal number in the case of 0.60 immediately) 1 / 0.6) is multiplied to perform the correction calculation. As a result, the fire monitoring data is removed from the influence of the decrease in the light receiving sensitivity. In addition, an allowable range (for example, 1.00 to 0.50) is preset for the light receiving sensitivity and R
When the calculated value of the light receiving sensitivity is stored in the OM3 and becomes equal to or lower than the lower limit value (0.50 in the above example), the correction calculation is not performed and a signal indicating that the correction limit is exceeded is output. Details of this will be described with reference to FIG.

In step S35 of FIG. 8, the sensor control circuit 20 determines whether or not the stain correction of the light-receiving glass 7 is necessary. This is because, for example, when a fire detector is installed in a tunnel or the like, the surface of the light-receiving glass 7 becomes dirty with the exhaust gas of the vehicle with the passage of time, and the light transmittance gradually decreases. Therefore, the external LED 4
L and 4R are used to measure the light transmittances of the left and right portions of the light-receiving glass 7, and the extinction ratio data is set to R.
Store in AM2. The dimming rate data also has an initial value of 1.00 at the time of installation and is updated to 0.95, 0.90, 0.85, etc. when the surface of the light receiving glass 7 becomes dirty.

Therefore, the MPU 1 of FIG. 5 reads the corresponding left or right extinction ratio data in the RAM 2, for example, 1.
If it is 00, it is determined that the correction is not necessary, and the process proceeds to step S37. If the value is 1.00 or less, it is determined that the correction is necessary, and the average value data in step S32 or step S3.
In step S36, the correction data of 4 is multiplied by a correction value (the reciprocal of the extinction ratio data) to perform a correction calculation. As a result, the average value data or the correction data is free from the influence of stains on the light-receiving glass. The data of the extinction ratio has a lower limit value (for example, 0.
50) is preset and stored in the ROM 4,
When the value is less than or equal to this lower limit value, the correction calculation is not performed and
When the signal indicating that the correction limit has been exceeded is output, or when the pre-set lower limit set to a value slightly higher than the lower limit (for example, 0.6) is reached, a signal indicating that the light-receiving glass needs to be cleaned is output. To output. Details of this will be described with reference to FIG.

Generally, in a two-wavelength radiant fire detector, a light receiving sensor (a photo sensor in this example) which detects a blue light of a flame from a light receiving output of a light receiving sensor (a pyroelectric element in this example) which detects a red light of a flame. The difference value is obtained by subtracting the received light output of the diode), and when the difference value exceeds the threshold value for flame discrimination, it is discriminated as flame. In this embodiment, the MPU 1 executes the step S37 of FIG.
If necessary, subtraction of the photodetection output calculation value of the photodiode from the photodetection output calculation value of the pyroelectric element for each monitoring area, in which the above-mentioned photodetection sensitivity and stain correction calculations have been respectively performed, is calculated. And the next step S3
8, the difference data of the subtraction result is the ROM of FIG.
It is discriminated whether or not the flame discrimination threshold value stored in 6 is exceeded, and flame discrimination is performed.

As the flame discrimination threshold value, a single threshold value can detect a flame. However, in this embodiment, when it is determined in step S38 that the detected flame is far or near at the same time, the ROM 6 of FIG.
And the second threshold, which is a slightly larger value, are stored. Naturally, the second threshold is a value larger than the first threshold. And step S3
In step S38, the difference data calculated in step 7 is first compared with the first threshold value, and if it exceeds the first threshold value, it is determined to be a flame. Then, the difference data is compared with a second threshold value, and if it exceeds the second threshold value, it is determined that it is a short-distance flame, and if it does not exceed the second threshold value, it is a long-distance flame. Of course, if the difference data does not exceed the first threshold value, it is determined that it is not a flame.

If the determination result of step S38 is not flame, the MPU 1 returns to step S32, and returns to step S32.
The processes of 32 to S38 are repeated. When the determination result is flame, in step S39, the transmission control circuit 21 is notified of the flame detection, the transmission control circuit 21 drives the signal transmitting / receiving unit 22, and the receiver detects the flame through the signal transmission line. Send a signal.

Upon receiving the flame detection signal from the fire detector, the receiver immediately transmits the flame accumulation restoration signal to the fire detector to reset the first flame detection signal and confirms the fire detection signal again. Check if the instrument sends the second flame detection signal. When a flame detection signal is transmitted a predetermined number of times (for example, three times) or more continuously from the same fire detector, it is determined that there is a true fire. In this way, false alarms are prevented from occurring.

The reception interrupt routine of the fire detector of FIG. 1 will be described with reference to FIGS. 9 and 10. First, when the receiver selects one of a plurality of fire detectors and issues an operation command to the selected fire detector, information on the address and operation command given in advance for each fire detector Is transmitted via a signal transmission line. 9 and 10 show a routine performed as an interrupt process by the fire detector that receives the address and operation command information transmitted by the receiver.
In the reception interrupt routine of FIG. 9, each fire detector first determines whether or not the received address matches the address given to itself (step S41). If the own address and the received address are different, the process returns from the reception interrupt routine to the main routine.

When the self-address coincides with the reception address, the fire detector first determines whether the reception command is an information request (step S42), and the determination result is YES.
In the case of, the present information of itself is sent to the receiver (step S43). Here, the current information of the fire detector is, for example, whether the flame is currently detected, if detected, how many times the flame is currently detected, or the current light receiving glass 7
Includes a plurality of pieces of information indicating the current state, such as whether the light transmittance is within the allowable range, the light receiving sensitivity of the current light receiving element is within the allowable range, and the like.

If the received command is not an information request, it is then determined whether the received command is a test command (step S4).
4) If the determination result is YES, the fire detector first causes the left and right internal LEDs 3Lb, 3Lr and 3Rb, 3Rr to sequentially emit light, similarly to the process of step S33 of FIG. Photodiode 1L and pyroelectric element 2L and right photodiode 1R and pyroelectric element 2R
Measure the light receiving sensitivity of each. If the measured photosensitivity is less than or equal to the set threshold value (for example, 50% of the reference value), the sensitivity defect is stored, and the test is repeated a plurality of times to continuously determine the number of the sensitivity defects. When the number of times reaches the number of times (for example, three times) or more, it is determined that the photodetector tested for the first time has a failure, and a failure signal of the corresponding photodetector is transmitted to the receiver.

Next, the fire detector operates in step S35 of FIG.
In the same manner as the processing of step 1, the external LEDs 4L and 4R are sequentially made to emit light, the transmittance of light indicating the degree of stain of the light-receiving glass 7 is measured, and the measured transmittance of light is set to a preset threshold value (for example, If it is 50% or less of the reference value, this stain failure is stored, and this test is repeated a plurality of times in the same manner as described above, and the number of stain failures is continuously a predetermined number (for example, 3).
When the number of times above is reached, the receiver is notified that cleaning of the light-receiving glass requires cleaning. After the test process is completed, the process returns to the main routine.

If the reception command is not a test command, it is then determined whether it is an inspection start command (step S46). If the determination result is YES, it is further determined whether only the right side, the left side, or both the left and right ( Step S47), based on the result of this determination, the right-side light receiving element is inspected by the pseudo flame light source of the inspection tester shown in FIG. Element inspection processing (steps S49 and S50) is performed. The inspection start command related to the processing contents of steps S46 to S50 is usually transmitted from the receiver to all of the plurality of fire detectors when performing the inspection test (see FIG. 14). When maintenance personnel use the tester to inspect each fire detector, it does not always follow the address numbers in order, and the addresses of the fire detectors are set in order due to replacement of devices that occur during use. It doesn't have to be. Therefore, the above-mentioned inspection notification signal is required to know which fire detector is currently undergoing the inspection test.

In this embodiment, the fire detector determines whether the received command is an inspection start command (step S
46), the sensor control circuit 20 supplies power to the amplifier 19 to set it in the operable state. Further, in addition to the pseudo flame light source, the tester is provided with a light emitting element 32 which is a means for generating an inspection notification signal (an optical signal of about 500 Hz in this example).
The optical signal of about 500 Hz is emitted as a signal notifying that the inspection test is currently being performed by the tester.

Then, when the fire detector during the inspection test detects the optical signal of about 500 Hz through the inspection notification signal light receiving element 6 and the amplifier 19, this detection signal together with its own address number is received by the receiver or the repeater. And so on. Therefore, it is unnecessary to communicate with a transceiver or the like, which is conventionally required. Further, since the tester irradiates the fire detector with the optical signal from the pseudo flame light source, if the contamination of the light-receiving glass 7 and the sensitivity of the light-receiving element are within the permissible range and the device is operating normally,
The fire detection signal and the in-inspection signal are transmitted from the corresponding fire detector to the receiver.

Therefore, the receiver side receives the flame detection signal and the in-inspection signal at the same time to know that the fire sensor under inspection test is normally operating, and if the other fire sensor is in operation. When only the flame detection signal is received from the fire detector, it can be known that the corresponding fire detector detects the actual flame. In this way, the inspection test can be performed while maintaining the flame detection function of all the other fire detectors except the fire detector during the inspection test. When the inspection test process is completed, the fire detector returns to the main routine.

When it is determined in step S46 in FIG. 9 that the inspection start command is not received, the MPU 1 in the sensor control circuit 20 determines that the operation command received in step S51 in FIG. , The operation / fire indicator lamps 5L and 5R include a green LED of the two-color LEDs) for turning on or off, and if the determination result is YES, in step S52,
Whether it is the right operation light or the left operation light is discriminated. In the case of the right side, step S53, and in the case of the left side, step S54.
Then, the operation of turning on or off the operation indicator lamp (flashing) or extinguishing the blinking state is performed. When the lighting or extinguishing operation is completed, the process returns to the main routine.

When it is determined in step S51 in FIG. 10 that the operation indicator lamp is not the lighting or extinguishing instruction, the MPU 1 in the sensor control circuit 20 determines in step S55 that the received operation instruction is the fire indicator lamp (this operation). In the example, it is determined whether it is a lighting or extinguishing command for the red LED of the two-color LEDs), and if the determination result is YES, in step S56, the right fire indicator light or the left fire indicator light If it is on the right, step S5
7 or in the case of the left side, in step S58, the operation of turning on the fire indicator light continuously or turning off the continuous lighting state is performed. When the lighting or extinguishing operation is completed, the process returns to the main routine.

If it is determined in step S55 of FIG. 10 that the command is not for turning on or off the fire indicator lamp, the MPU 1 in the sensor control circuit 20 determines whether the operation command received in step S59 is a storage recovery command. To determine. Here, the storage restoration command means that when the fire detector first detects a flame and sends this detection signal to the receiver, the receiver that receives this detection signal waits for a while and To reset the fire monitoring data that has been collected and accumulated and collect new data again.
This is a reset command to test whether or not the second flame detection is performed, that is, to prevent the occurrence of a false alarm. If the decision result in the step S59 is YES, it is decided whether it is the right side or the left side (step S60), and if the right side, the step S61, and if the left side, the step S61.
At 62, the above-mentioned storage recovery operation is performed, and then the process returns to the main routine.

If it is determined in step S59 in FIG. 10 that the storage recovery command is not received, the sensor control circuit 20
In step S63, the MPU 1 therein determines whether it is a restoration command. If the determination result is YES, all the data are reset in step S64, and if NO, the process immediately returns to the main routine. Here, resetting all data means resetting the fire monitoring data collected up to that point as well as resetting (that is, turning off) the lighting data of the operation indicator light and the fire indicator light, and turning on the fire detector after the power is turned on. It is to restore to the initial state. After the completion of this restoration process, the process returns to the main routine.

The test operation of the fire detector of FIG. 1 will be described with reference to the flowchart of FIG. In this embodiment, FIG.
The test routine of (1) is started when the power of the fire detector is turned on, a test command from the receiver, or a timer interrupt process. However, in any case, the switch or the like may be used to select whether to start the test routine. In step S71 in FIG. 11, the sensor control circuit 20 determines whether the left or right internal pseudo light source (internal LE
D) Flush 3Lb, 3Lr or 3Rb, 3Rr by flashing. In this case, the pseudo light is made to flash in a flame fluctuation frequency band of about 8 to 12 Hz.

Then, the sensor control circuit 20 makes the photodiode 1L and the pyroelectric element 2L, which are light receiving elements, or the photodiode 1 in a state where the internal pseudo light source is made to emit light.
Each received light data based on the detection signal of R and the pyroelectric element 2L,
The data is sequentially read through the multiplexer and the A / D converter in the I / O interface, and the read data is sequentially stored in the RAM 4. Then, the received light data that has been read in as much as possible is averaged within the time allowed for fire detection, and the averaged data is stored in the RAM 4 as received light output data (step S
72). After the collection of the received light data, the sensor control circuit 20 turns off the internal pseudo light source (step S73),
The ratio of the averaged light receiving data and the light receiving sensitivity reference value stored in advance in the ROM 2 is calculated as the light receiving sensitivity of the corresponding light receiving element, and the calculated value of the light receiving sensitivity is set in advance and stored in the ROM 2. Whether or not the received light data is normal is determined by whether or not the received light sensitivity is within the normal range (for example, 1.00 to 0.85) (step S74).

If the result of the determination in step S74 is normal, it is determined that the correction is unnecessary and the process proceeds to step S78. If not, the process proceeds to step S75. In step S75, whether or not the calculated value of the light receiving sensitivity is not within the normal range but is still within the correctable range is determined as follows. In this embodiment, the permissible range of the light receiving sensitivity is set in advance as 1.00 to 0.50 and stored in the ROM 3. The calculated value of the light receiving sensitivity is the lower limit value of the allowable range (0.
50) Whether or not the received light data can be corrected is determined depending on whether or not the above is satisfied.

Further, in this embodiment, a value (for example, 0.60) slightly higher than the lower limit value (0.50) of the allowable range of the light receiving sensitivity is set in advance as the lower limit value, At the step S75, it is also determined at the same time whether the calculated value of the light receiving sensitivity is less than or equal to the front lower limit value.

When it is determined in step S75 that the correction is possible, the sensor control circuit 20 multiplies the received light data by the reciprocal of the calculated received light sensitivity, and performs a correction calculation for sensitivity deterioration. The value of is stored in the RAM 3 (step S76). Then, the process proceeds to step S78. Then, in step S75, if the light-reception sensitivity calculated value is equal to or lower than the lower limit value of the allowable range (0.50 in the above example) and it is determined that the sensitivity correction exceeds the limit and is impossible, the fire detector proceeds to step S75. In S77, the sensitivity abnormality signal of the corresponding light receiving element is transmitted to the receiver. Further, in step S75, a comparison determination is performed with the front lower limit value (0.60 in the above example), and when the light reception sensitivity calculated value is equal to or lower than the front lower limit value,
Similarly, in step S77, the receiver is notified of a notice signal of reception sensitivity deterioration (a signal indicating that it is just before sensitivity deterioration and requires preparation for repair such as arrangement of parts).

The receiver that receives the abnormal signal of the light receiving element from the fire detector repeats the sensitivity test of the same light receiving element of the fire detector, and repeats the sensitivity test for a predetermined number of times (for example, 3 times).
If more than one abnormal signal is returned, the corresponding light receiving element is determined to have failed, and a repair instruction is issued immediately. Also, when the receiver receives the advance notice signal of the deterioration of the light-receiving sensitivity, the operator repeats the confirmation by repeating the operation and prepares for repair after confirmation. The above test is conducted separately from the left test and the right test.

In step S78 of FIG. 11, the sensor control circuit 20 flashes the left or right external pseudo light source (external LED) 4L or 4R for the stain test of the light-receiving glass 7. In this case, the light source is made to flush at a frequency range of about 8 to 12 Hz, which is a fluctuation frequency band of a flame at the time of fire.

Then, the sensor control circuit 20 receives the light-receiving data based on the detection signal of the photodiode 1L or 1R, which is a light-receiving element, while the external pseudo light source is emitting light, and outputs the received light data to the multiplexer and A in the I / O interface, respectively. The data is sequentially read via the / D converter, and the read data is sequentially stored in the RAM 4. Then, the received light data that has been read in as much as possible is averaged within the allowable range of time, and the averaged data is stored in the RAM 4 as received light output data (step S79). In the case of the stain test of the light-receiving glass 7, one light-receiving element is sufficient, and therefore, the light-receiving data of the pyroelectric element is not used in this embodiment.

After the end of the data collection, the sensor control circuit 20 turns off the external pseudo light source (step S80), and calculates the extinction rate for each of the left side and the right side of the light receiving glass 7 (step S81). The extinction ratio is calculated as a ratio between the averaged received light data and the extinction ratio reference value stored in advance in the ROM 5. In this example,
The allowable range of the extinction ratio is set in advance as 1.00 to 0.50 and stored in the ROM 4. Then, it is determined whether or not the received light data can be corrected depending on whether or not the calculated value of the extinction ratio is equal to or more than the lower limit value (0.50 in the above example) of the allowable range (step S8).
2).

Further, in this embodiment, a value (for example, 0.60) slightly higher than the lower limit value (0.50) of the allowable range of the extinction ratio is set in advance as the lower limit value. At the same time, in step S82, it is determined whether or not the calculated value of the extinction ratio is less than or equal to the front lower limit value.

When it is determined in step S82 that the correction is possible, the sensor control circuit 20 multiplies the received light data by the reciprocal of the calculated extinction ratio to perform a stain correction correction operation. The value of the rate is stored in the RAM 2 (step S83). Then, in step S82, when the calculated extinction ratio value is equal to or lower than the lower limit value (0.50 in the above example) of the allowable range and it is determined that the stain correction exceeds the limit and is impossible, the fire detector determines that In step S84, the stain abnormality signal on the left side or the right side of the light receiving glass 7 is transmitted to the receiver. Further, in step S82, a comparison determination with the front lower limit value (0.60 in the above example) is performed, and when the calculated extinction ratio is equal to or less than the front lower limit value, in step S84, similarly. A notice signal of the stain abnormality (a signal indicating that the stain-absorbing glass 7 needs to be cleaned in the corresponding light-receiving direction immediately before the stain abnormality) is sent to the receiver.

When the receiver receives the stain abnormality signal from the fire detector, the receiver repeats the stain test of the light-receiving glass of the fire detector, and the abnormality signal is returned a predetermined number of times consecutively (for example, 3 times) or more. In this case, the relevant light-receiving glass is judged to have been contaminated and the cleaning instruction is given immediately. Also, when the receiver receives the advance notice signal of the stain abnormality, the operator repeats the confirmation by repeating the operation and issues a cleaning preparation instruction after confirmation. The above test is conducted separately for the left side test and the right side test.

The flame detection operation of the fire detector of FIG. 1 will be described with reference to the flowcharts of FIGS. The flame detection operation based on this flowchart is commonly used in the case of an actually generated flame and in the case of a pseudo flame signal generated from an inspection tester. This will be described in more detail.
In step S91 of FIG. 12, the fire detector performs initial processing. This initial process is step S in FIG.
The processing is the same as that of 31, such as clearing the RAM data, checking the ROM data sum, storing the initial data for correction of the light receiving element alone, clearing the counter, and waiting for the stabilization time of the amplifier.

Then, it is determined whether or not the received data matches the address of its own fire detector (step S92),
If they match, the process proceeds to step S101, and if they do not match, the received light output data is read (step S93). Then, within the allowable range of time, the process of calculating the average value of the received light output data read as much as possible, and the process of correcting the received light sensitivity and the stain correction of the translucent glass as necessary for this calculated value are performed. , Steps S32 to S36 of FIG.
And step S72 of FIG. 11 is performed.

At step S94 in FIG. 12, the sensor control circuit 20 compares the difference data between the two received light outputs with the threshold value for fire determination, and the flame is detected as in the case of step S38 in FIG. It is determined whether or not it is detected. At this time, the received light output is determined after being corrected similarly to the processing of steps S33 to S37 of FIG. Step S
If the flame is not detected in the determination of 94, the sensor control circuit 20 sets the value f of the counter provided in the RAM 6 for counting the number of times of flame detection to 0 and clears the count value of the counter (step S95). ). That is, when the flame detection signal is continuously input, this counter sequentially counts up, but if flame detection is not performed during counting, the count value up to that point is reset to zero. After that, the process returns to step S92.

When the flame is detected by the determination in step S94, the sensor control circuit 20 adds 1 to the count value f of the counter up to that point (step S96).
It is determined whether the value of the counter f is equal to or larger than a preset number F (for example, 3) (step S97). As a result of this determination, when the value f of the counter is less than the set number F, the process returns to step S92 and the addition of the number of flame detections is repeated.

As a result of the determination in step S97, if the number of times flame detection is continuously performed (the value f of the counter) reaches or exceeds the set number F, the inspection flag is turned on next. It is determined whether or not (step S98), whether a pseudo flame signal is detected (inspection flag is on) or a flame signal due to fire occurrence is detected (inspection flag is off). Then, in the case of detecting the pseudo flame signal, both the flame signal and the inspection signal are set as the transmission information (step S9).
9) If the fire flame signal is detected, only the flame signal is set as the transmission information (step S100), and the process returns to step S92.

The sensor control circuit 20 proceeds to step S101.
Then, it is determined whether the received data is an information request command, and in the case of the information request command, the information preset in the fire detector, for example, the flame detection information set in steps S99 and S100 is sent out. (Step S10
2) Then, the information that has been sent is cleared (step S103). When sending the information set in step S102, the self address may be added and sent. When it is determined in step S101 that the received data is not the information request command, the sensor control circuit 20 determines whether the received data is an inspection start permission signal (step S104). If the determination result is YES, When the power of the amplifier 19 of FIG. 1 which is the inspection notification signal light receiving circuit is turned on and the inspection tester irradiates its own fire detector with the optical signal of about 500 Hz which is the inspection notification signal, this irradiation is performed. The light is set to a detectable state (step S105).

When a maintenance worker operates the inspection tester by bringing it close to the light receiving glass 7 of the fire detector to be inspected, the optical signal of about 500 Hz emitted from the tester causes the inspection notification signal light receiving element 6 and the amplifier. It is detected via 19 and supplied to the sensor control circuit 20. Upon being supplied with the inspection notification signal, the sensor control circuit 20 immediately activates the inspection notification signal reception interrupt routine shown in the upper right part of FIG. 13, and first, its own fire detector is under inspection test by the tester. So that the receiver can be notified, an inspection notification signal is set as transmission information (step S111), the inspection flag is turned on (step S112), and step S9
Return to 2.

If it is determined in step S104 that it is not the inspection start permission signal, the sensor control circuit 20 determines that
In step S106 of 3, it is determined whether the received data is an inspection end signal to the fire detector of its own. If the result of the determination is YES, the inspection signal light receiving circuit (the amplifier 1 in FIG.
The power of 9) is turned off (step S107). When it is determined in step S106 that the signal is not the inspection end signal, the sensor control circuit 20 determines in step S108 of FIG.
Then, it is determined whether or not the received data is a restoration signal to the fire detector of its own, and if the determination result is YES, as shown in FIG.
The same process as the recovery process described in step S36 is performed, and the process returns to step S92. If the determination result is not the restoration signal, the process directly returns to step S92.

In the radiant fire detector in the above embodiment, the light extinction rate is determined from the measured value of the detection signal level of the light receiving element and the extinction rate reference value in order to determine the degree of contamination of the translucent cover. Although it is calculated and discriminated, as a reference value for discriminating the degree of contamination of the light receiving element, an allowable range of the degree of contamination corresponding to the measured value is set in advance and stored in, for example, the ROM 5 to detect the light receiving element. The signal level measurement value may be compared with the lower limit value of the contamination degree allowable range for determination. Further, in order to determine the degree of deterioration of the light receiving element, the light receiving sensitivity is calculated and determined from the ratio of the measured value of the detection signal level of the light receiving element and the light receiving sensitivity reference value.
As a reference value for determining the degree of deterioration of the light receiving element, an allowable deterioration range corresponding to the measured value is set in advance, for example, RO
It may be stored in M2, and the measured value of the detection signal level of the light receiving element may be compared with the lower limit value of the allowable deterioration range for determination.

The radiation type fire detector in the above embodiment is
An example of the case of the two-wavelength type in which the magnitude relation of the radiant energy detected in the two wavelength bands of the radiant light from the flame is compared has been shown, but the present invention is not limited to this, for example, a single wavelength. Regardless of the presence or absence of a translucent cover, even if there is a constant radiant type that detects the amount of radiant energy in the band, a flicker type that detects flicker peculiar to flames, or a system that uses three or more wavelengths, In addition, the present invention can be applied to all radiant fire detectors that can carry out an inspection test by using pseudo flame light, and can achieve the same effect.

The radiation type fire detector in the above embodiment is
Although an example in which there are two sensing areas on the front left side and the right side with respect to the installation surface is shown, the present invention is not limited to this, and for example, all three-dimensional space in front is a single sensing area. In some cases, even if it is provided in the center of the plaza and has four sensing areas on the front left and right sides and the rear left and right sides, that is, in the case of a radiant fire detector having one or more sensing areas. Also, it is possible to obtain the same effect by applying the present invention.

[0095]

As described above, according to the present invention, a light receiving element for receiving the radiant light emitted from the flame or the pseudo flame light emitted from the tester, and the fire detecting means based on the detection signal of the light receiving element. In the radiant fire detector having the above, when a pseudo flame light is emitted from the tester to the light receiving element to perform an inspection test of the fire detecting means, a pulse or a different pulse from the pseudo flame light generated from the tester is used. Since the inspection notification signal of any one of light of wavelength, electromagnetic wave, ultrasonic wave, or magnetic force is detected in a non-contact manner, and the detected inspection notification signal is transmitted to the receiver or the repeater, the conventional method is used. There is no longer a need for maintenance personnel at the fire detector installation location to inform the maintenance personnel on the receiver side of the number of fire detectors to be tested by using a transceiver or the like.

Further, according to the present invention, the radiation type fire detector is provided in advance in the tester when an inspection test of the fire detecting means is performed by irradiating the light receiving element with pseudo flame light from the tester. When the fixed or movable protruding part is brought into contact with the recessed part of the radiation sensor,
Since the contact of the protrusion is detected as the inspection notification signal and the detection signal is transmitted to the receiver or the like, the inspection notification signal can be detected at low cost.

Further, according to the present invention, the radiant fire detector can detect the inspection notification signal for the first time after receiving the inspection start permission signal transmitted from the receiver or the like. The reliability of the equipment has been improved by not accidentally detecting non-input signals or contact of articles as inspection notification signals.

Further, according to the present invention, the radiant fire detector receives the inspection start permission signal transmitted from the receiver or the like to enable the notification signal detection circuit, and the inspection notification signal generated from the tester. Since only the fire detector that actually detected the alarm informs the receiver that the inspection test is in progress, the receiver recognizes the fire sensor under inspection test and the other flame detectors detect the original flame. It has become possible to maintain the function.

Further, according to the invention, the radiation type fire detector is provided with the light receiving sensitivity compensating means of the light receiving element, and the inspection test of the fire detecting means is performed by irradiating the light receiving element with pseudo flame light from the tester. In this case, since the inspection test can be performed by compensating the deterioration of the light reception sensitivity by the automatic light reception sensitivity compensating means, the conventional manual compensation work of the light reception sensitivity at the time of the inspection test becomes unnecessary.

Further, according to the present invention, when the radiant fire detector has a light-transmitting cover, it is provided with an automatic compensating means for the stain of the light-transmitting cover so that the pseudo flame light is transmitted from the tester. When an inspection test of the fire detecting means is performed by irradiating the light receiving element through the light-transmitting cover, the inspection test can be performed by compensating the stain of the light-transmitting cover by the automatic stain compensating means. , Cleaning work of the translucent cover at the time of the conventional inspection test became unnecessary.

Further, according to the present invention, when the radiant fire detector has a light-transmitting cover, it is provided with an automatic compensating means for stains on the light-transmitting cover and a light-receiving sensitivity compensating means for the light-receiving element, When performing a test test of the fire detection means by irradiating the light receiving element with the pseudo flame light transmitted from the tester through the transparent cover, the contamination of the transparent cover is compensated by the automatic compensation means for the contamination. Since the inspection test can be performed by compensating for the deterioration of the light receiving sensitivity by the light receiving sensitivity automatic compensating means, the work of cleaning the light-transmitting cover and the light receiving sensitivity compensating work at the time of the conventional inspection test are unnecessary, and the working time is reduced. Was significantly reduced.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a radiation fire detector showing an embodiment of the present invention.

2 is a configuration diagram of the radiant fire detector of FIG. 1. FIG.

FIG. 3 is a diagram showing left and right sensing areas of the radiant fire detector of FIG.

FIG. 4 is a diagram showing a positional relationship between the light receiving element of FIG. 2 and an internal LED.

5 is a configuration block diagram showing an example of the sensor control circuit of FIG. 1. FIG.

FIG. 6 is an external view showing an example of a tester for inspecting a fire detector.

FIG. 7 is a diagram showing a positional relationship between a fire sensor and an inspection tester at the time of inspection.

FIG. 8 is a flowchart showing a main routine of a control program for the radiant fire detector of FIG.

9 is a flowchart showing a first part of a reception interrupt program of the radiant fire detector of FIG. 1. FIG.

10 is a flowchart showing a second part of the reception interrupt program of the radiant fire detector of FIG. 1. FIG.

11 is a flowchart showing a test program for the radiation fire detector of FIG. 1. FIG.

FIG. 12 is a flowchart showing a first part of the flame detection program for the radiant fire detector of FIG. 1.

FIG. 13 is a flowchart showing a second part of the flame detection program for the radiant fire detector of FIG. 1.

FIG. 14 is a diagram showing an example of a plurality of fire detectors installed in a tunnel and a receiver connected via a signal transmission line.

[Explanation of symbols]

 1L, 1R left side, right side photodiode 2L, 2R left side, right side pyroelectric element 3Lb, 3Lr left side inside LED 3Rb, 3Rr right side inside LED 4L, 4R left side, right side outside LED 5L, 5R left side, right side operation / fire indicator light 6 inspection Notification signal light receiving element 7 light receiving glass 8L, 8R left side, right side transparent glass 9A case A 9B case B 11L, 12L left side preamplifier 11R, 12R right side preamplifier 13L, 14L left side amplifier 13R, 14R right side amplifier 15L-18L left side smoothing circuit 15R-18R Right side smoothing circuit 19 Amplifier 20 Sensor control circuit 21 Transmission control circuit 22 Signal transmitting / receiving section 23L, 24L Left side lighting circuit 23R, 24R Right side lighting circuit 25L, 25R Left side, right side lighting control circuit 26, 27 Clock circuit 28, 29 Reset circuit

Claims (7)

[Claims] 1. A radiant fire detector comprising: a light receiving element for receiving radiant light emitted from a flame or pseudo flame light emitted from a tester; and fire detecting means based on a detection signal of the light receiving element. In order to notify the radiation sensor that the tester is in the inspection test when the fire detector is irradiated with pseudo flame light from the tester to perform the inspection test of the fire detection means, it is provided in advance in the tester. And an inspection notification signal detecting means for non-contact detection of an inspection notification signal of any of light or electromagnetic waves, ultrasonic waves, or magnetic force different from the pseudo flame light generated from the inspection notification signal generating means. , The inspection notification signal detected by the inspection notification signal detection means,
A radiant fire detector, comprising: a receiver or a repeater that should be notified when a fire is detected. 2. A radiant fire detector comprising: a light receiving element for receiving radiant light emitted from a flame or pseudo flame light emitted from a tester; and fire detecting means based on a detection signal of the light receiving element. In order to inform the radiation type sensor that the inspection test is being performed by the tester when the inspection test of the fire detection means is performed by irradiating the light receiving element with pseudo flame light from the tester, it is provided in advance in the tester. When a fixed or movable protruding portion is brought into contact with the recessed portion of the radiation detector, an inspection notification signal detecting means for detecting the contact of the protruding portion as an inspection notification signal, and the inspection notification signal detecting means. The inspection notification signal detected by
A radiant fire detector, comprising: a receiver or a repeater that should be notified when a fire is detected. 3. Receiving means for receiving and detecting an inspection start permission signal for permitting the start of inspection test by the tester transmitted from a receiver or a repeater, and an inspection start permission signal received and detected by the receiving means. 3. The radiant fire detector according to claim 1, further comprising signal detection operation control means for controlling the inspection notification signal detection means from an inoperable state to an operable state based on the above. 4. A receiving means for receiving and detecting an inspection start permission signal, which is transmitted from a receiver or a repeater, for permitting the start of an inspection test by the tester, and an inspection start permission signal received and detected by the receiving means. Based on the inspection notification signal detection means from the inoperable state to the operable state, the signal detection operation control means, based on the inspection start permission signal received and detected by the receiving means, the signal detection operation control means In the case of controlling the inspection notification signal detection means in an operable state, when the fire detection means receives the radiant light from the flame or the pseudo flame light emitted from the tester to perform the flame detection operation,
Depending on whether or not the inspection notification signal detecting means detects the inspection notification signal, it is determined whether the fire is detected by the pseudo flame light or the actual flame is detected, and the determination result is the receiver or the relay which should make the notification. The radiant fire detector according to claim 1 or 2, further comprising an operation determination and transmission means for transmitting to a firearm or the like. 5. The radiant fire detector according to claim 1, wherein a light-emitting element for a light-receiving sensitivity test of the light-receiving element and the light-emitting element is turned on during a light-receiving sensitivity test to receive light. Receiving sensitivity test means for emitting sensitivity test light, and irradiating the emitted light receiving sensitivity test light to the light receiving element, measuring a detection signal level of the light receiving element, and receiving light of the light receiving element based on the measured value. Light receiving sensitivity calculating means for calculating sensitivity, light receiving sensitivity determining means for determining whether or not the calculated value of the light receiving sensitivity is equal to or more than a lower limit value of a preset light receiving sensitivity allowable range, and determination of the light receiving sensitivity determining means If the result is affirmative, according to the calculated value of the light receiving sensitivity, the amplification degree of the amplifier for amplifying the output of the light receiving element is changed, or the threshold value for detecting a fire is changed to change the light receiving sensitivity. The deterioration of And a light receiving sensitivity automatic compensating means for irradiating the light receiving element with pseudo flame light from the tester to perform an inspection test of the fire detecting means. The radiation fire detector is characterized in that the inspection test is performed by compensating the deterioration of the light receiving sensitivity. 6. The radiant fire detector according to claim 1, wherein radiant light emitted from the flame or pseudo-flame light emitted from a tester is transmitted, and the transmitted light is transmitted. A light-transmitting cover that causes the light-receiving element to receive light, a light-emitting element provided on the outside of the cover for a stain test of the light-transmitting cover, and the light-emitting element is lit during a stain test to emit stain test light. A stain test means and the emitted stain test light are transmitted through the light-transmitting cover to irradiate the light-receiving element, the detection signal level of the light-receiving element is measured, and the light-transmitting property is measured based on the measured value. Extinction rate calculating means for calculating the extinction rate of the cover, and a stain degree determining means for determining whether or not the calculated value of the extinction rate is equal to or more than the lower limit value of the preset extinction rate allowable range, When the determination result of the contamination degree determination means is affirmative According to the calculated value of the extinction ratio, the amplification degree of the amplifier that amplifies the output of the light receiving element is changed, or the threshold value for detecting a fire is changed to prevent contamination of the translucent cover. In the case of performing an inspection test of the fire detection means by irradiating the light receiving element through the light transmissive cover with pseudo flame light from the tester, the automatic compensation means for pollution including a pollution compensation means for compensating, A radiation-type fire detector characterized in that an inspection test is performed by compensating the contamination of the translucent cover with the automatic compensation means for the contamination. 7. The radiant fire detector according to claim 1, wherein radiant light emitted from the flame or pseudo-flame light emitted from a tester is transmitted, and the transmitted light is transmitted. A light-transmitting cover that causes the light-receiving element to receive light, a light-emitting element provided on the outside of the cover for a stain test of the light-transmitting cover, and the light-emitting element is lit during a stain test to emit stain test light. A stain test means and the emitted stain test light are transmitted through the light-transmitting cover to irradiate the light-receiving element, the detection signal level of the light-receiving element is measured, and the light-transmitting property is measured based on the measured value. Extinction rate calculating means for calculating the extinction rate of the cover, and a stain degree determining means for determining whether or not the calculated value of the extinction rate is equal to or more than the lower limit value of the preset extinction rate allowable range, When the determination result of the contamination degree determination means is affirmative According to the calculated value of the extinction ratio, the amplification degree of the amplifier that amplifies the output of the light receiving element is changed, or the threshold value for detecting a fire is changed to prevent contamination of the translucent cover. An automatic stain compensating means including a stain compensating means for compensating, a light emitting element provided inside the translucent cover for the light receiving sensitivity test of the light receiving element, and turning on the light emitting element during the light receiving sensitivity test. A light-receiving sensitivity test means for emitting a light-receiving sensitivity test light, and the light-receiving sensitivity test light thus emitted is applied to the light-receiving element, the detection signal level of the light-receiving element is measured, and based on the measured value, A light receiving sensitivity calculating means for calculating the light receiving sensitivity, a light receiving sensitivity determining means for determining whether or not the calculated value of the light receiving sensitivity is equal to or more than a lower limit value of a preset light receiving sensitivity allowable range, and the light receiving sensitivity determining means Affirmative result If, in accordance with the calculated value of the light receiving sensitivity,
By changing the amplification degree of the amplifier for amplifying the output of the light receiving element, or by changing the threshold value for detecting a fire,
And a light receiving sensitivity automatic compensating means including a light receiving sensitivity compensating means for compensating the deterioration of the light receiving sensitivity, wherein the fire detection is performed by irradiating the light receiving element with pseudo flame light from the tester through the light transmissive cover. When conducting an inspection test of the means, it is possible to perform the inspection test by compensating for the contamination of the translucent cover by the automatic compensation means for the contamination and compensating for the deterioration of the light reception sensitivity by the automatic compensation means for the light reception sensitivity. A characteristic radiant fire detector.