JP2008145249A - Radiation thermometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiation thermometer capable of effective temperature control and management in manufacturing process lines of various products with achieving overall downsizing including a display means and cost reduction. <P>SOLUTION: A radiation thermometer 1 includes: an infrared detection means 4 for detecting infrared rays radiated from an object to be measured; a CPU 8 for converting the amount of the detected infrared rays into a thermal signal of the object to be measured; and a display means 12 of the thermal signal output from the CPU 8, wherein the display means 12 has an LED device having an LED module 9 consisting of LEDs 9R, 9B, and 9G of three different colors, respectively; a drive control part 10 for performing drive control of light emission of the LED module 9 corresponding to the thermal signal output from the CPU 8; and an LED display 11 disposed across a thermometer body B for displaying the temperature of the object to be measured in a plurality of luminescent colors including intermediate colors produced by mixing two colors. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is incorporated and installed in a production processing line for various products such as foods, IC substrates, paper products, etc., and controls and manages the manufacturing processing temperature by measuring the temperature of various products in the manufacturing processing process or inspection process in a non-contact manner. It is related with the radiation thermometer used for.

  This radiation thermometer detects the amount of infrared rays radiated from a measurement object such as the above-mentioned various products with an infrared detector such as a thermopile or a thermistor bolometer, and the detected infrared amount is measured with the temperature of the measurement object. It is configured to convert to a signal and display the converted temperature signal. For displaying the temperature signal, conventionally, a display means for displaying a numerical value using a 7-segment LED (light emitting diode) has been generally employed (see, for example, Patent Documents 1 and 2).

  In addition, as a display means for improving the visibility of display information such as temperature, a plurality of LEDs having different emission colors are arranged as a backlight light source for illuminating an LCD (liquid crystal unit), and gradation is included by combining the emission colors of these LEDs. A display means is also known in which display information is displayed with good visibility by illuminating the LCD with a plurality of colors of backlights (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. 10-318845 JP 2006-189369 A JP 2002-328048 A

  However, among the above-described conventional radiation thermometers, as shown in Patent Documents 1 and 2, in which the display means for displaying the temperature signal of the measurement object numerically using a 7-segment LED is used, for example, 3 digits and a decimal point from 0 to 99.9 are displayed with a resolution of 0.1. In order to be able to read the displayed numerical values clearly, a considerably large display area is required. The whole means is easy to enlarge. As a result, the display means is a radiation thermometer (comprised of an infrared detection means and a calculation means) that is miniaturized on the assumption that it is installed and used in a production processing line as described above. It must be used separately and separately at a remote location. For this reason, for example, when a plurality of radiation thermometers are installed on the production processing line and used to measure the temperature at a plurality of locations, there is a problem such as misidentification in the correspondence between each radiation thermometer and each display means. In addition, there is a problem that it is necessary to wire a signal line, a power line, etc. on the line floor etc. in order to connect the display means and the radiation thermometer installed at positions distant from each other, and there is a problem that the installation cost increases. .

  In addition, as shown in Patent Document 3, the display means using a plurality of LEDs having different emission colors as the backlight light source of the LCD has a larger display area than the former one. In addition, the configuration of the information processing unit and the drive unit of the LED and LCD is very complicated, and the entire display means is further increased in size and cost as compared with the former one, and the radiation thermometer for the use as described above. As it was unsuitable.

  The present invention has been made in view of the above circumstances, and its purpose is to provide visibility such as operation confirmation in the production processing line of various products while reducing the overall size and cost including the display means. An object of the present invention is to provide a radiation thermometer that can be used effectively for predetermined temperature control and temperature management by exhibiting the monitor function.

  In order to achieve the above object, a radiation thermometer according to the present invention includes an infrared detector that detects infrared rays emitted from an object to be measured, an arithmetic unit that converts an output signal of the infrared detectors into a temperature signal, A radiation thermometer comprising a display means for displaying a temperature signal output from the calculation means, wherein the display means is at least two different emission colors according to the temperature signal output from the calculation means And a light emitting diode display unit capable of displaying the temperature of an object to be measured with an emission color including an intermediate color obtained by mixing at least two colors based on an output signal of the drive control unit. It is characterized by being.

  According to the present invention having the above-described characteristic configuration, the display means for displaying the temperature signal obtained by the conversion of the amount of infrared rays emitted from the measurement object is the light emission of the light emitting diodes of at least two different emission colors. A light-emitting diode display that can display the temperature of the measurement object in a light-emitting color including an intermediate color in which at least two colors are mixed. Compared with conventional display means for displaying numerical values using 7-segment LEDs and display means using a plurality of LEDs of different emission colors as backlight light sources for LCDs, the display area can be significantly reduced and driven. The configuration of the control unit is simple, and the display means itself can be reduced in size and cost, and it is assumed that it will be installed in a production processing line. Easily install display means on the radiation thermometer body that is designed, or place it in close proximity so that there is no error in the correspondence between the two (radiation thermometer and display means) It is.

  In this way, the display means can be used in an integrated or extremely close position, and the temperature of the measurement object can be displayed in at least three emission colors including intermediate colors. When a thermometer is installed and used on a production line for various products (objects to be measured), for example, whether or not the radiation thermometer is installed in a normal orientation with respect to various products while saving space. In addition, when a manufacturing process starts, various monitor products and their surrounding temperatures are suitable for a given manufacturing process. In addition to being able to measure the temperature of various products at the time of actual manufacturing and processing, in real time while staying at the location of the radiation thermometer, etc. Easily detected can be confirmed under a glance, thus, an effect that can be used to exert the extremely effective function for temperature control and temperature control in various product manufacturing process line.

  In particular, in the radiation thermometer according to the present invention, by attaching the light emitting diode display unit integrally to the thermometer body (Claim 3), the radiation thermometer including the display means is made simple and easy to handle. In addition, even when multiple radiation thermometers are installed and used at short distance intervals, the temperature of the object to be measured by each radiation thermometer can be accurately detected and confirmed without causing misunderstandings or misunderstandings. can do.

  In addition, unit display units composed of light emitting diodes of at least two different emission colors in the light emitting diode display unit are arranged in a two-dimensional array, and the temperature distribution of the measurement object is controlled by light emission drive control in each of these unit display units. Can be displayed (Claim 4), the temperature condition of the measurement object can be detected and confirmed in more detail, and the monitoring function such as operation check and the control performance and management performance of the manufacturing processing temperature can be further enhanced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the appearance of a radiation thermometer according to the first embodiment of the present invention, and FIG. 2 is a block diagram showing the structure of the radiation thermometer. This radiation thermometer 1 includes a lens barrel 3 that fixes and holds a lens 2 that collects infrared IR radiated from the measurement object A at the tip, an infrared detection means 4, an amplification circuit 5, and an A / D conversion circuit described later. 6, a box-shaped thermometer body B having a memory 7 and a CPU 8 serving as a calculation means, and a display device for displaying temperature information measured by being integrally fixed to the outer surface of the thermometer body B Display means) 12. Further, at a position away from the radiation thermometer 1, for example, a measurement room or a central monitoring room R, an internal interface (I / F) 13 and a communication line 14 that are measured by the radiation thermometer 1 and are installed in the body B are provided. A display unit 15 that receives the temperature signal of the measurement object A transmitted via the display unit and displays numerical values or emission colors is separately provided. However, the display unit 15 is not necessarily required.

  The infrared detecting means 4 receives, for example, infrared rays emitted from the measuring object A and collected by the condenser lens 2 by an infrared light receiving unit 4A constituting a thermistor bolometer type infrared detecting element, and the received infrared amount is converted into a voltage. It is detected as a change in. Since this infrared detecting means 4 is well known, the description of the specific configuration and the like is omitted. The voltage detected by the infrared detecting means 4 is amplified by the amplifier circuit 5, converted to a digital signal by the A / D conversion circuit 6, and input to the CPU 8.

  The memory 7 stores a temperature conversion table in which a plurality of digital signals corresponding to the amount of received infrared rays are associated with corresponding temperature values, and the CPU 8 stores the temperature conversion table stored in the memory 7. The temperature value corresponding to the plurality of digital signals input from the infrared detection means 4 is output to the display device 12 as the temperature signal of the measurement object A.

  As shown in FIG. 3, the display device 12 corresponds to a temperature signal output from the LED module 9 including three types of three-color LEDs of a red light emitting LED 9R, a blue light emitting LED 9B, and a green light emitting 9G, and the CPU 8. Based on the temperature value and display color relationship table set and stored in advance, the drive control unit (ON / OFF) controls the three types and three colors of LEDs 9R, 9B, and 9G in the LED module 9 ( Driver) 10 and a light emitting LED display device having a display unit 11 integrally attached to the outer surface of the thermometer body B, and the LED module 9 is connected to the temperature signal via the driver 10 for a predetermined time. By controlling the drive at T intervals, three LEDs, red, blue, and green, are selected as shown in FIG. 4 according to the combination of the ON / OFF states of the LEDs 9R, 9B, and 9G. Monochromatic and yellow, light blue (cyan), purple is configured to display the temperature of the measurement object A on the display unit 11 in emission color of a total of seven patterns of the four intermediate color such as (magenta) and white.

In the drive controller 10, as shown in FIG. 5, the drive current of each LED 9R, 9B, 9G or the ratio T _ON / T _OFF (PEM) of the turn-on interval T _ON and the turn-off interval T _{OFF at} a predetermined time interval T By controlling the (duty ratio), it is possible to display the temperature of the measuring object A not only with the seven emission colors shown in FIG. 4 but also with the emission colors such as 26 colors and 63 colors. .

  Although not shown or described, the infrared detector 4 is provided with a temperature measuring element such as a thermistor for measuring the internal temperature of the infrared light receiving unit 4A at a position close to the infrared light receiving unit 4A. The temperature value corresponding to the amount of infrared detected by the infrared light receiving unit 4A may be corrected by the internal temperature of the infrared detecting means 4 measured by the above. In this case, it is possible to detect an accurate temperature value of the measurement object A regardless of a change in ambient (ambient) temperature.

  The radiation thermometer 1 according to the embodiment of the present invention configured as described above includes, for example, as shown in FIG. 6A, temperature control in a heating and kneading process of food such as rice cakes and sea urchins, (B), temperature control in the preheating process of the IC substrate, as shown in (C) of the figure, temperature management during rubber mastication, as shown in (D) of the figure, paper Temperature control in the laminating process of paper and wallpaper, as shown in (E) of the figure, temperature measurement in the inspection process of the heating part of the heater, as shown in (F) of the figure, heat generation check of the motor, As shown in (G) of the figure, the temperature at the time of manufacturing, inspection and inspection of various products (objects to be measured) A, such as the finish management of car body painting, is installed in the manufacturing and inspection lines of various products (measurement objects) A Used for control and temperature management.

  In any of the above-described usage modes, the infrared light emitted from the measurement object A such as a manufactured product is received by the light receiving unit 4A of the infrared detecting means 4, and the amount of received light is determined as a change in voltage. After being detected, the digital signal is input to the CPU 8 through the amplifier circuit 5 and the A / D converter circuit 6.

  Subsequently, after the digital signal is converted into the temperature signal of the measuring object A based on the temperature conversion table stored in the memory 7 in the CPU 8, based on the converted temperature signal and display color relationship table. The light emission of the LED module 9 is driven and controlled via the drive control unit 10 of the light emitting LED display device 12. As a result, the temperature of the object A to be measured is a total of seven light emission colors including three single colors of red, blue, and green and four intermediate colors of yellow, light blue (cyan), purple (magenta), and white. One is selected and displayed on the display unit 11, and the current approximate temperature of the measuring object A is easily and accurately confirmed at the installation position of the radiation thermometer 1 by looking at the display color. Can do.

  As described above, as the display means for displaying the temperature of the measurement object A, the light emitting diode display device 12 capable of displaying in seven colors including the intermediate color as described above is used to display numerical values using a conventional seven-segment LED. Compared with display means for displaying and a display means using a plurality of LEDs of different emission colors as the backlight light source of the LCD, the display area can be remarkably reduced, and the configuration of the drive control unit is simple, and the display device 12 It is possible to reduce the size and cost of the radiation thermometer 1 as a whole. Therefore, when installing in a production processing line or the like, while saving space, for example, whether the radiation thermometer 1 is installed in a normal orientation and orientation with respect to various products, In addition to being able to demonstrate a monitor function with excellent visibility for checking the operation, such as whether the ambient temperature is suitable for a given manufacturing process or not, the actual operation It is possible to easily check in real time and clearly at a glance the temperature change guideline of the temperature of various products at the time of manufacturing and processing, while staying at the position where the radiation thermometer 1 is installed. It can be used in a state in which a very effective function is exhibited for temperature control and temperature management in the production processing line of various products.

  FIG. 7 is an enlarged view of the main part of the radiation thermometer 1 according to the second embodiment of the present invention, that is, the display unit 11 of the light-emitting LED display device 12, and the radiation temperature according to the second embodiment. The total 1 is arranged in a two-dimensional array of a plurality of LED modules 9 composed of three types of three-color LEDs, a red light emitting LED 9R, a blue light emitting LED 9B, and a green light emitting LED 9G. The unit display portions 11a are similarly arranged in a two-dimensional array, and a plurality of LED modules 9 are controlled to be turned on / off (ON / OFF) by the dynamock drive of the drive control unit 10, thereby forming a two-dimensional array. The unit display section 11a is configured to be able to display an approximate temperature distribution of the measuring object A by emitting light in different emission colors.

  According to the radiation thermometer 1 according to the second embodiment, since the approximate temperature distribution of the measurement object A is displayed, the measurement object or its peripheral portion is included by looking at the display unit 11. By detecting and confirming the temperature state in more detail, the monitoring function and the actual manufacturing processing temperature control performance and management performance can be further enhanced.

  In each of the above-described embodiments, the radiation thermometer 1 including the lens barrel 3 that fixes and holds the lens 2 that collects the infrared IR radiated from the measurement object A at the tip end has been described. Needless to say, the present invention may be applied to a radiation thermometer in a form not having the.

  Further, in each of the above-described embodiments, the light emitting LED display device 12 has been described using the LED module 9 formed by combining three types of three-color LEDs of the red light emitting LED 9R, the blue light emitting LED 9B, and the green light emitting 9G. A combination of two types of two-color LEDs such as a red light emitting LED 9R and a blue light emitting LED 9B, a blue light emitting LED 9B and a green light emitting 9G, and a red light emitting LED 9R and a green light emitting 9G may be used.

  Further, in each of the above embodiments, each element constituting the light emitting LED display device 12 is described as being integrally attached to the inside and the outer surface of the thermometer body B. However, the light emitting LED display device 12 is attached to the thermometer body B. May be manufactured separately, and the separate light emitting LED display device 12 may be detachably held on the thermometer body B.

It is a perspective view which shows the external appearance of the radiation thermometer which concerns on the 1st Embodiment of this invention. It is a block diagram of the radiation thermometer. It is a drive circuit diagram of the light emission LED display apparatus in a radiation thermometer same as the above. It is a figure which shows the example of the combination of the luminescent color by the timing chart of each LED drive control in the light emission LED display apparatus same as the above, and its drive control. It is a figure which shows the other example of the combination of the luminescent color by the timing chart of each LED drive control in the light emission LED display same as the above, and its drive control. (A)-(G) is a schematic perspective view which shows the use (application) example of a radiation thermometer. It is an enlarged view of the display part of the light emission LED display apparatus in the radiation thermometer which concerns on 2nd Embodiment of this invention.

Explanation of symbols

1 Radiation thermometer 4 Infrared detection means 8 CPU (calculation means)
9 LED module 9R Red LED
9B Blue light emitting LED
9G green LED
10 Drive controller (driver)
DESCRIPTION OF SYMBOLS 11 Display part 11a Unit display part 12 Light emission LED display apparatus (display means)
A Measurement object B Thermometer body

Claims (4)

Infrared detection means for detecting infrared radiation radiated from the measurement object, calculation means for converting the output signal of the infrared detection means into a temperature signal, and display means for displaying the temperature signal output from the calculation means A radiation thermometer,
The display means drives and controls at least two kinds of light emitting diodes of different light emission colors according to the temperature signal output from the arithmetic means, and at least two colors based on the output signal of the drive control section A radiation thermometer comprising a light emitting diode display unit capable of displaying the temperature of an object to be measured with an emission color including a mixed intermediate color.   2. The radiation thermometer according to claim 1, wherein the light emitting diodes of the light emitting diode display section are three types of a red light emitting diode, a blue light emitting diode, and a green light emitting diode.   The radiation thermometer according to claim 1 or 2, wherein the light emitting diode display unit is integrally attached to the thermometer body.   Unit display units composed of light emitting diodes of at least two different emission colors in the display means are arranged in a two-dimensional array, and the temperature distribution of the measurement object is displayed by light emission drive control in each of these unit display units. The radiation thermometer according to claim 1, 2 or 3 configured to be possible.

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