KR101462445B1 - Optic fiber temperature measurement system and method thereof - Google Patents

Abstract

The present invention is provided to maintain the temperature of an object to be measured within the range of a normal temperature by managing the temperature change of the measured object and comparing the temperature change with the range of the normal temperature. An optical temperature sensor measuring system using an optical cable includes: a heating cable which is installed in a measurement object; an optical cable which is installed in the measurement object around the heating cable; a heating cable temperature controller which controls the temperature of the measurement object around the heating cable by being connected with the heating cable; and an optical temperature sensor measuring device which is connected with the optical cable, measures the temperature of the measurement object by using the optical cable, and constantly maintains the temperature of all positions of the measurement object by controlling the heating cable temperature controller.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical fiber temperature measurement system,

The present invention relates to an apparatus and method for detecting a temperature change occurring in a power bus duct that is used when a temperature control management such as a gas storage place is required, And a method for the same. 2. Description of the Related Art

As energy consumption has increased recently, large-scale storage sites for oil and gas, which are energy sources, are needed. However, these energy sources are very sensitive to temperature changes in storage and storage. There is a risk of explosion if the temperature of the storage area rises. If the temperature of the storage area goes down too much, problems may occur.

In order to efficiently operate and secure high reliability of such a storage facility, there is a strong demand for constant monitoring of the facility and construction of an anomaly prevention management system. Especially, when the facility is long and is distributed in a large area, It is necessary to provide a highly reliable sensing system that collects the monitoring information of the electronic device without collecting the electromagnetic induction disturbance.

 In recent years, various sensor technologies have been developed and sensors using photonic technology have been developed. However, most of them are point sensors capable of measuring only the temperature of a local part. In order to detect a long section, A power supply, a transmission device, and the like are required, so it is practically impossible to sense the whole.

Korean Patent Application No. 2004-0032366 refers to a technique for detecting an abnormality or a fire of a cable installed in a building through measurement of reflected light of an optical cable, but a feature of managing the temperature change by measuring the temperature of the measurement object is mentioned It is not.

The object of the present invention is to maintain the temperature of the measurement object within the normal temperature range by managing the temperature change of the measurement object and comparing it with the normal temperature range.

It is still another object of the present invention to measure temperature changes of a measurement object more stably and accurately using a plurality of optical cables.

Other objects of the present invention will become readily apparent from the following description of the embodiments.

According to an aspect of the present invention, there is provided a temperature measurement system for a measurement object using an optical cable, the system comprising: a heating cable installed in a measurement object; an optical cable installed in the measurement object in the vicinity of the heating cable; A heating cable temperature control device for controlling the temperature of the measurement object in the vicinity of the heating cable; And a light temperature sensor measuring device connected to the optical cable and measuring the temperature of the measurement object using the optical cable and controlling the heating cable temperature control device to maintain a constant temperature at all positions of the measurement object, Wherein the optical temperature sensor measurement system comprises:

The optical temperature sensor measuring apparatus may further include a distance measuring unit measuring a distance between a specific position of the optical cable and the optical cable, a temperature measuring unit measuring a temperature of the specific position of the optical cable, A measured object temperature change calculating unit for calculating a temperature change at a corresponding position to be measured of the measurement object by using the distance and the temperature measured by the measurement object; And a display unit for displaying the temperature of the measurement object on the basis of a plurality of intervals of the measurement object.

Here, when the normal temperature range of the measurement object is set and the temperature of the corresponding position of the measurement object deviates from the normal temperature range, the temperature of the corresponding position of the measurement object is controlled by controlling the heating cable temperature control device And a temperature control unit for controlling the temperature to be within a normal temperature range.

Here, the measurement object temperature change calculation unit may divide the area of the measurement object into a plurality of intervals, and calculate a temperature change for each interval.

Here, the temperature change per section may be a maximum temperature, a minimum temperature, and an average temperature within a measurement period.

The apparatus may further include an alarm unit for notifying the temperature calculated by the measurement object temperature change calculation unit when the temperature is outside the normal temperature range.

The optical cable and the heating cable may be embedded in the measurement object when the measurement object is a support base structure.

Here, the optical cable may have a structure in which only one side of the optical cable is connected to the optical cable connection part.

Here, the optical cable may have a loop structure in which both ends of the optical cable are connected to the optical cable connection portion.

Here, the optical cable is composed of two or more optical cables, one optical cable operates normally, and the remaining optical cables are configured as spare.

Here, the optical cable is composed of two or more optical cables, and the measurement distance and the temperature of the optical cable are measured using the optical cables. The measurement object temperature change calculation unit averages the measurement distance and the temperature of the measured optical cable, And calculating the corresponding position and temperature to be measured.

A method of measuring a temperature of a measurement object using an optical cable, the method comprising: setting a normal temperature range of the measurement object; and determining at least one of a specific position of the optical cable and a specific position of the optical cable using scattered light in the optical cable, Calculating a temperature of the corresponding position, a corresponding position to be measured of the measurement object and a temperature at the corresponding position, and determining whether the calculated temperature is within the normal temperature range. A method for measuring an optical temperature sensor is provided.

And generating an abnormal alarm when the calculated temperature is out of the normal temperature range as a result of the determination.

Here, when at least one heating cable is installed in the measurement object, the heating cable is individually controlled when the calculated temperature deviates from the normal temperature range, and temperature control is performed so that the temperature of the corresponding position is within the normal temperature range The method comprising the steps of:

The present invention has the effect of more accurately measuring the temperature of a wide area.

Further, there is an effect that the temperature of the measurement object can be maintained within the normal temperature range.

1 is a diagram showing a configuration of a light temperature sensor measuring system according to an embodiment of the present invention.
2 is a diagram illustrating a configuration for measuring a temperature of a measurement object using an optical temperature sensor measurement system according to an embodiment of the present invention.
FIG. 3 is a view showing that an optical cable is connected to a light temperature sensor measuring device in a loop structure according to another embodiment of the present invention.
4 is a view illustrating a specific position of an optical cable using scattered light according to an embodiment of the present invention.
FIG. 5 is a diagram for explaining a method of measuring the temperature of a position where scattered light in an optical cable is reflected using Rayleigh scattered light and Raman scattered light spectrum according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating the position and temperature of a rear optical cable at a position where an anomaly occurs when an abnormality occurs in a specific position of the optical cable according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating the construction of separate loops using two optical cables according to an embodiment of the present invention.
FIG. 8 is a diagram illustrating measurement of sections of measurement objects separately using a plurality of optical cables according to an embodiment of the present invention. FIG.
Fig. 9 is a view showing a case in which a plurality of optical cables are included in a case forming one loop according to an embodiment of the present invention. Fig.
10 is a diagram showing the temperature management for each zone of an object to be measured by using an optical cable according to an embodiment of the present invention.
FIG. 11 is a diagram illustrating the construction of an optical temperature sensor measuring system by adding an apparatus for temperature control according to an embodiment of the present invention.
12 is a diagram illustrating a plurality of measurement objects managed by one optical temperature sensor measurement system using one optical cable constituted by a loop according to an embodiment of the present invention.
FIG. 13 is a diagram illustrating the management of a plurality of measurement objects by connecting only one side of an optical cable to one optical temperature sensor measurement system according to an embodiment of the present invention.
14 is a diagram showing a configuration of a light temperature sensor measurement system according to an embodiment of the present invention.
FIG. 15 is a diagram showing a temperature for each section of a measurement object in the display unit according to an embodiment of the present invention. FIG.
16 is a view showing a method of measuring a light temperature sensor according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. First and second or the above terms are used only for the purpose of distinguishing one element from another. Also, the singular expressions may include plural expressions unless the context clearly dictates otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing a configuration of a light temperature sensor measuring system according to an embodiment of the present invention.

1, the optical fiber temperature management system (OTMS) of the present invention includes an optical temperature sensor measuring apparatus 100, an optical cable 200, a heating cable temperature control apparatus 400, , And heating cables 401, 402, 403, 404, 405.

The optical temperature sensor measuring apparatus 100 measures the temperature of a specific distance of the optical cable 200 using the optical cable 200 and measures the position and the temperature of the measurement object 300 using the distance of the optical cable and the temperature of the optical cable. Can be measured.

The optical cable 200 is connected to the temperature sensor measurement device 100 and is installed in the measurement object 300. The optical cable 200 receives incident light from the temperature sensor measuring device 100 and reflects the scattered light.

The heating cable temperature control device 400 controls the heating cables 401, 402, 403, 404, and 405 provided in the measurement object 300 under the control of the optical temperature sensor measurement device 100, To be in the normal range.

The heating cables 401, 402, 403, 404, and 405 are provided in one or more of the measurement objects 300. Each of the heating cables 401, 402, 403, 404, 405 is installed at a predetermined interval in the measurement object 300 so that the heating cables 401, 402, 403, 404, It is responsible for the temperature of a certain area.

The optical cable 200 and the heating cables 401, 402, 403, 404, and 405 may be embedded in the measurement object 300 when the measurement object 300 is a support base structure.

In FIG. 1, the optical cable 200 and the heating cables 401, 402, 403, 404, and 405 are installed at different heights of the measurement object 300.

2 is a diagram illustrating a configuration for measuring a temperature of a measurement object using an optical temperature sensor measurement system according to an embodiment of the present invention.

As shown in FIG. 2, the optical temperature sensor measuring apparatus 100 of the present invention measures the temperature of the measurement object 300 using the optical cable 200. That is, in the present invention, the optical cable 200 is used as a sensor for measuring the distance and the temperature.

The optical temperature sensor measuring apparatus 100 can measure the scattered light reflected in the optical cable 200 to determine the specific position of the optical cable 200 and measure the temperature at the corresponding position. The reason why the optical cable can be used as a sensor for measuring the distance and the temperature will be described later with reference to FIG. 4 and FIG.

The optical cable 200 is connected to the optical temperature sensor measuring apparatus 100 and is installed in contact with the measurement object 300. In FIG. 2, a single optical cable 200 is installed in the measurement object 300 at regular intervals in a zigzag form in order to measure the temperature of all the positions of the measurement object 300.

The optical cable 200 may be installed in the measurement object 300 as shown in FIGS. 1 and 2, and the bent portion may be disposed outside the measurement object 300 to form a zigzag shape. It may be installed so as to protrude. That is, the portion bent from one line to the next line of the optical cable 200 may be configured to be out of the measurement object 300. The reason why the portion bent from one line to the next line of the optical cable 200 is disposed outside the measurement object 300 is that if an abnormality occurs in a specific line of the measurement object 300, A portion of the measurement object 300 which is out of the measurement object 300 is disconnected to connect the defective portion to the optical temperature sensor measuring apparatus 100 to irradiate light to the next line of the generated abnormal line, The temperature of the next stage can be measured, or since the optical cable 200 is drawn into the measurement object 300, there is an advantage that the maintenance can be facilitated at the time of disconnection.

In the case where the optical cable 200 is connected to the optical temperature sensor measuring apparatus 100 as shown in FIG. 2 (that is, only one side of the optical cable 200 is connected to the optical temperature sensor measuring apparatus 100) The sensor measuring apparatus 100 can measure light scattered by the light reflected from the optical cable by irradiating light from the side connected to the optical cable 200 and measuring the temperature of the spot where the scattered light is reflected.

However, in the structure in which only one side of the optical cable 200 as shown in FIG. 2 is connected to the optical temperature sensor measuring apparatus 100, in the case where the specific part of the optical cable 200 is abnormal or disconnected, No light is transmitted. Therefore, it is impossible to measure the distance and the temperature using the optical cable at the rear portion of the optical cable portion where the abnormality occurs.

As shown in FIG. 1, heating cables 401, 402, 403, 404 and 405 are installed around the optical cable 200 so that the temperature of the measurement object is measured using the heating cables 401, 402, 403, 404, The temperature of the object to be measured 300 may not be maintained at a constant temperature due to external environmental factors or the like. That is, the temperature of a specific site may be lower than that of other sites. When the temperature of the measurement object is not constant, the position of the structure installed above the measurement object 300 may be changed.

For example, when the measurement object 300 is a support base structure of the gas storage tank, if the temperature of the specific region is different from other regions, the surface of the region may swell up or off. If the surface can not maintain a constant height, the gas storage tank may be inclined, which may adversely affect the storage and storage of the gas. If the temperature of the measurement object 300 is not constant, the temperature of all the parts of the gas storage tank can not be maintained constant, and therefore, there is a risk of explosion.

Therefore, when the measurement object 300 is a support base structure, it is very important to keep the temperature of all the parts constant. In the present invention, in order to keep the temperature of all the parts of the measurement object 300 constant, heat is transmitted through the heating cable at a low temperature region using the heating cables 401, 402, 403, 404, and 405, Keep the temperature constant with the surrounding temperature. In the high temperature region, reduce the heat transmitted from the heating cable and lower the temperature to keep it constant with the ambient temperature.

Although the heating cable is not shown in FIG. 2, the heating cable may be located between each line of the optical cable 200 as in FIG.

In addition, the optical temperature sensor measurement system of the present invention may further include an RTD (Resistance Temperature Detector) sensor.

2, when the RTD sensor 500 is installed in the measurement object 300 in addition to the optical cable 200 and an error occurs in the optical cable to cause a problem in temperature measurement, the measurement object (300) 300) is measured.

2 shows that the RTD sensor 500 is installed at a central portion of the measurement object 300. However, one or more RTD sensors 500 may be installed at various positions of the measurement object 300. FIG.

FIG. 3 is a view showing that an optical cable is connected to a light temperature sensor measuring device in a loop structure according to another embodiment of the present invention.

As shown in FIG. 3, the optical cable 200 is connected to the other side optical temperature sensor measuring device 100, not to the side of the optical cable 200, so that both sides of the optical cable 200 are connected to the optical temperature sensor measuring device 100 As shown in FIG.

3 shows that the optical cable 200 is embedded in the measurement object 300 when the measurement object 300 is a support base structure.

 In the structure in which both ends of the optical cable 200 are connected to the optical temperature sensor measuring apparatus 100, the optical temperature sensor measuring apparatus 100 can irradiate light at both ends of the optical cable 200. Therefore, even when an abnormality occurs in a specific portion of the optical cable 200, the position and temperature of all the portions of the optical cable 200 in which the abnormality occurs can be measured by irradiating light from the other side.

A detailed description thereof will be given later with reference to FIG.

Although the heating cable is not shown in FIG. 3, the heating cable may be positioned between each line of the optical cable 200, as in FIG.

4 is a view illustrating a specific position of an optical cable using scattered light according to an embodiment of the present invention.

When light is incident on the optical cable 200, the incident light is absorbed by the quartz molecules in the optical cable to generate a transverse mode of thermal vibration, and then a part of the light is re- Stokes < / RTI > In addition, a part of the light is converted into a short-wavelength anti-Stokes light having a shorter wavelength than the incident light which absorbs the transverse mode and re-emits the energy.

At this time, a phenomenon such as scattering and absorption occurs due to the glass gratings (SiO 2) in the optical cable 200. Rayleigh scattered light having the same wavelength component as the incident light and scattered light having a different wavelength component exist in this scattered light. The components of other wavelengths have different names depending on the wavelength transition. Among them, the scattered light due to interaction with the transverse mode among the lattice thermal vibrations of the constituent materials is called Raman scattering light. This Raman scattering light exhibits a strong temperature dependence due to the Maxwell-Boltzmann energy distribution which exists between the various vibrational states of the quartz molecules. That is, the characteristic changes depending on the temperature.

Here, the position X at which the scattered light is generated inside the optical cable 200 can be simply calculated by measuring the time of the speed of light and the time the scattered light returns to correspond to the following formula (1).

Formula (1): X = v * t / 2

(v: transmission speed of light in the optical cable, t: time taken for scattered light to return)

That is, the position X at which the scattered light is generated can be measured by measuring the time at which light is incident and returned, dividing it by 2, and multiplying by the speed of light (2 x 10E8 m / sec).

FIG. 5 is a diagram for explaining a method of measuring the temperature of a position where scattered light in an optical cable is reflected using Rayleigh scattered light and Raman scattered light spectrum according to an embodiment of the present invention.

When abnormal deterioration occurs in a specific portion of the optical cable 200, Raman scattering light whose amplitudes vary with temperature varies in scattered light scattered at a specific point where abnormal deterioration occurs. The scattered light is reflected by the Raman scattering light The temperature of the point can be measured.

That is, since the Raman scattering light has a component of a wavelength different from the wavelength of the input light among the scattered light returning to the input end to which the light is irradiated, if the ratio of the wavelength of the incident light to the wavelength of the Raman scattering light reflected back is measured, The absolute temperature of the spot where the scattered light is reflected can be calculated.

The intensity ratio of the Stokes light and the anti-Stokes light is measured by the following formula (2)

Formula (2):

(h, k: Planck constant and Boltzmann constant,

    c: Light speed during vacuum

    T: Absolute temperature of core in optical fiber section receiving scattered light

v: frequency of incident light)

The temperature of the point where the scattered light of the optical cable 200 is reflected is obtained by the following formula (3).

Formula (3):

(tr: Reference point (reference fiber inside the distribution temperature sensor) Absolute temperature,

   r: reference position in reference optical fiber,

AS [j]: Additive value of anti-stokes light,

 S [j]: add value of stokes light,

K1, K2, K3: constant value)

Therefore, it is possible to measure the absolute temperature of the medium regardless of the light intensity, the incident condition, the structure of the optical cable, and the composition of the material by measuring the Stokes light and the anti-Stokes light in the optical cable 200, There is an optical fiber attenuation difference between Stokes and anti-Stokes wavelengths, and the propagation speed of light in the optical cable differs due to wavelength difference. Therefore, optical transmission characteristics, mechanical characteristics, and construction characteristics must be considered.

FIG. 6 is a diagram illustrating the position and temperature of a rear optical cable at a position where an anomaly occurs when an abnormality occurs in a specific position of the optical cable according to an embodiment of the present invention.

If the point at which an abnormality occurs in the optical cable 200 is X (hereinafter, X means a broken portion of the optical cable), the optical cable is connected to the optical temperature sensor measuring apparatus 100 with the structure shown in FIG. 2 The distance and temperature of the optical cable after the point X can not be measured. In other words, if the incident light travels from A to B direction, it is impossible to measure the position of the zone from X to B and the temperature measurement after the X point. This is because the incident light can not be transmitted.

3, when the optical fiber 200 is connected to the optical temperature sensor measuring apparatus 100 in a loop structure, the position and temperature of the zone from A to X irradiate the incident light to the A point The position and temperature of the zone from B to X can be measured using scattered light that reflects incident light and reflects back to B point.

Here, the position and temperature measured by the scattered light in the present invention are the point and the temperature in the optical cable 200. Therefore, the temperature of the specific region and the region of the measurement object 300 are calculated by using the measured position and temperature in the optical cable.

Therefore, when the optical cable 200 is brought into contact with the object to be measured 300 in a zigzag manner, it is important to keep the intervals between neighboring optical cables at a constant interval.

In FIG. 6, the spacing between neighboring optical fibers 200 is kept constant so that a line of optical fibers can measure a constant distance L of the region of the measurement object 300.

Although the heating cable is not shown in FIG. 6, the heating cable may be positioned between each line of the optical cable 200 as in FIG.

FIG. 7 is a diagram illustrating the construction of separate loops using two optical cables according to an embodiment of the present invention.

The present invention can also be configured as a plurality of loops 210 and 220 using a plurality of optical cables.

That is, one optical cable 210 can be used as a sensor for measuring a normal position and temperature, and another optical cable 220 can be used as a means for preparing a case where an optical cable 210 is operated.

7, when the position and the temperature of the X-point of the measurement object 300 are measured, when an error occurs in the optical cable 210 performing the normal operation, the preliminary optical cable 220 is used to measure X The position and temperature of the point can be measured.

FIG. 8 is a diagram illustrating measurement of sections of measurement objects separately using a plurality of optical cables according to an embodiment of the present invention. FIG.

That is, the section of the measurement object 300 may be divided into a plurality of sections, and the optical fibers 210, 220, 230, 240, 250, 260, and 270 may be positioned in each section, and the position and temperature of the section may be measured using the optical cable .

7, the measurement object 300 may be divided into seven sections, and one optical cable may be positioned in each section to measure a desired position and a temperature at the corresponding section within the section.

Here, the heating cable is not shown, but may be located adjacent to the optical cables 210, 220, 230, 240, 250, 260, and 270.

Fig. 9 is a view showing a case in which a plurality of optical cables are included in a case forming one loop according to an embodiment of the present invention. Fig.

As shown in FIG. 7, when a plurality of optical cables are used to form separate loops to measure the position and temperature of the measurement object 300, a separate optical cable must be contacted or embedded in the measurement object 300, Time and process are required.

Accordingly, in the present invention, it is possible to show the effect of using a plurality of loops as described in FIG. 7 by simply constructing a single loop on a measurement object by using the case 210 including a plurality of optical cables 201 and 202.

10 is a diagram showing the temperature management for each zone of an object to be measured by using an optical cable according to an embodiment of the present invention.

In the present invention, the measurement object 300 is divided into a plurality of zones A1, A2, B1, B2, C1, C2, C3, D1, D2, D3, E1, E2, F1, F2, You can also manage it.

That is, by calculating and managing the maximum temperature, the minimum temperature, and the average temperature in the measurement period for each of the zones A1, A2, B1, B2, C1, C2, C3, D1, D2, D3, E1, E2, F1, The temperature change of each zone can be known.

That is, although not shown in FIG. 10, a zone of the measurement object, the temperature of which is controlled through the heating gimbals during the control of the temperature control in the heating cable installed adjacent to the optical cable 200, A1, A2, B1, B2, C1, C2, C3, D1, D2, D3, E1, E2, F1 and F2.

By thus managing the temperature of the divided zone by dividing the measurement object into a plurality of zones A1, A2, B1, B2, C1, C2, C3, D1, D2, D3, E1, E2, F1, F2, Can identify the area where the problem occurs frequently and can establish countermeasures.

11 is a view showing a modified configuration of a heating cable in a light temperature sensor measuring system according to an embodiment of the present invention.

In FIG. 1, the heating cables 401, 402, 403, 404, and 405 and the optical cable 200 are installed at different heights of the measurement object. However, when the heating cables 401, 402, 403, 404, and 405 and the optical cable 200 are installed at different heights, a measurement error may occur due to the distance. That is, when the heating cables 401, 402, 403, 404 and 405 and the optical cable 200 are installed at different heights without being adjacent to each other, the temperature measured by the optical cable 200 may be different from the temperature controlled by the heating cables 401, 402, 403, 404 and 405 have.

11, one or more heating cables 401, 402, 403, 404, and 405 may be inserted between the lines of the optical cable 200 in a staggered manner between the lines of the optical cable 200, do. In this case, the distance between the optical cable 200 and the heating cables 401, 402, 403, 404, 405 can be kept to a minimum so that the temperature transmitted from the heating cables 401, 402, 403, 404, It is possible to measure more accurately.

12 is a diagram illustrating a plurality of measurement objects managed by one optical temperature sensor measurement system using one optical cable constituted by a loop according to an embodiment of the present invention.

The present invention can also be managed by connecting a plurality of measurement objects (301, 302, 303, 304) to one optical temperature sensor measurement apparatus (100).

That is, a loop is formed in one optical temperature sensor measuring apparatus 100, and one optical cable connected to each of the measurement objects 301, 302, 303, and 304 is continuously connected to measure the position and temperature of a desired position of the measurement object, Can be managed.

Here, although the heating cable is not shown, a heating cable may be installed adjacent to the optical cable installed in each of the measurement objects 301, 302, 303, and 304. [

FIG. 13 is a diagram illustrating the management of a plurality of measurement objects by connecting only one side of an optical cable to one optical temperature sensor measurement system according to an embodiment of the present invention.

The basic configuration is similar to that of FIG. 12, but one optical cable having only one side connected to the optical temperature sensor measuring device 100 is continuously connected to the measurement targets 301, 302, 303, and 304, Temperature can be measured and managed.

Here, although the heating cable is not shown, a heating cable may be installed adjacent to the optical cable installed in each of the measurement objects 301, 302, 303, and 304. [

14 is a diagram showing a configuration of an optical temperature sensor measuring apparatus according to an embodiment of the present invention.

The optical temperature sensor measuring apparatus 100 of the present invention includes an optical cable connecting unit 110, a distance measuring unit 120, a temperature measuring unit 130, a measured object temperature changing calculating unit 140, a display unit 150, ), And an alarm unit 170.

The optical cable connection unit 110 performs a function of irradiating incident light or measuring scattered light to a place connected to the optical cable.

The distance measuring unit 120 measures the distance of the point where the scattered light is reflected by using the scattered light received through the optical cable connection unit 110 as described above with reference to FIG.

The temperature measuring unit 130 measures the temperature at the point where the scattered light is reflected as described above with reference to FIG. 4 by using the scattered light received through the optical cable connection unit 110.

The measurement object temperature change calculation unit 140 calculates a temperature change at a corresponding position to be measured of the measurement object using the measured distance and temperature. The optical cable does not measure the temperature of all the areas of the object to be measured but measures the temperature at the place where the optical cable is located. It may cause a difference due to the error in the distance from the desired point of the object to be measured. Therefore, the measured object temperature change calculator 140 calculates the temperature of the desired point using the measured position and temperature from the optical cable. Or when a plurality of optical cables are used, the temperature at a desired point can be calculated using the temperature measured at each optical cable and the distance measured at the optical cable. For example, when two or more optical cables are configured as shown in FIG. 6, the distance and temperature measured in each optical cable can be averaged to calculate the position and temperature of the object to be measured.

The display unit 150 not only displays the position and temperature measured using the optical cable, but also divides the measurement object into a plurality of sections and displays a temperature change of each section.

The temperature controller 160 is connected to the heating cable temperature controller 400. When it is necessary to control the temperature of the specific area of the measurement object 300, the heating cable temperature control device 400 is controlled to control the temperature of the heating cable installed in the corresponding area, Can be controlled to a desired temperature.

The alarm unit 170 generates an alarm when the temperature of the measurement object is out of the normal range, and notifies the system administrator of the alarm.

FIG. 15 is a diagram showing a temperature for each section of a measurement object in the display unit according to an embodiment of the present invention. FIG.

The display unit 150 divides a region of the measurement object 300 into a predetermined distance and displays a temperature change of the corresponding region according to the distant distance.

15, for example, the measurement object 300 is divided at intervals of 1 m and the temperature change of the corresponding zone is displayed. Here, the temperature change may be a maximum temperature, a minimum temperature, and an average temperature.

16 is a view showing a method of measuring a light temperature sensor according to an embodiment of the present invention.

In step S100, the normal temperature range of the measurement object 300 is set.

The range of normal operation may be different depending on the measurement object 300. [ Accordingly, in the present invention, when an object to be measured is specified, a temperature range in which the object to be measured 300 operates normally is set.

Step S110 is a step of measuring the position and temperature of the point where the scattered light is reflected by the distance measuring unit 120 and the temperature measuring unit 130 using the scattered light.

In step S120, a position to be measured of the measurement object is determined using the distance and the temperature in the measured optical cable, and the temperature of the position is calculated.

Since the measured position and temperature are the distance and the temperature in the optical cable, the position of the measurement object to be measured is calculated through the distance and temperature correction, and the temperature of the position is calculated.

In step S130, it is determined whether the temperature of the specific area of the measurement object calculated in step S120 is included in the normal temperature range.

In step S140, an abnormal alarm is generated when the temperature of the specific area of the measurement object calculated as a result of the determination in step S130 is out of the normal temperature range. Here, step S140 is not an essential constituent step of the present invention. That is, the process may proceed directly from step S130 to step S150 without an alarm.

In step S150, it is determined whether the temperature of the measurement object calculated as a result of the determination in step S130 is a normal temperature range or a problem due to the temperature change. If the temperature is outside the normal temperature range, if the difference is not significant, you can simply signal the alarm. If it deviates greatly from the normal temperature range, a problem due to the temperature change may occur. In this case, it is necessary to judge whether there is a possibility of a problem due to the temperature change.

In step S160, if it is determined that the temperature of the specific area of the measurement object calculated as a result of the determination in step S150 is far out of the normal range and a problem may arise, the temperature controller 160 controls the heating cable temperature controller 400 to measure Controlling the corresponding heating cable installed in a specific area of the object 300 so that the temperature of the corresponding area is raised or lowered to be within the normal temperature range. In FIG. 15, when the temperature of the specific region of the measurement object 300 is lower than the normal range, heat is generated in the heating cable installed in the region to raise the temperature of the region (position) Respectively.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims And changes may be made without departing from the spirit and scope of the invention.

100: Optical temperature sensor measuring device 110: Optical cable connection part
120: distance measuring unit 130: temperature measuring unit
140: Measurement object temperature change arithmetic unit 150:
160: Temperature control unit 170: Alarm unit
200: Optical cable 300: Measurement object
400: heating cable temperature control device 401,402,403,404,405: heating cable
500: RTD (Resistance Temperature Detector) sensor

Claims (15)

1. A temperature measurement system for a measurement object using an optical cable,
A heating cable installed on a measurement object;
An optical cable installed in the measurement object in the vicinity of the heating cable;
A heating cable temperature control device connected to the heating cable and controlling a temperature of the measurement object around the heating cable; And
And an optical temperature sensor measuring device connected to the optical cable and measuring the temperature of the measurement object using the optical cable and controlling the heating cable temperature control device to maintain a constant temperature at all positions of the measurement object,
The optical cable
The method includes sensing a temperature of each region by dividing an area of an internal region of the measurement object into a plurality of regions having a constant interval, the region being embedded in the measurement object so that a constant gap is maintained in a zigzag pattern,
The heating cable
Wherein the optical fiber cable is inserted and arranged between the lines of the zigzag optical cable in a staggered manner so as to maintain a constant distance from the adjacent optical cable.
The method according to claim 1,
The optical temperature sensor measuring device comprises:
Optical cable connection;
A distance measuring unit for measuring a distance of a specific position of the optical cable;
A temperature measuring unit for measuring a temperature of a specific position of the optical cable;
A measured object temperature change calculating unit for calculating a temperature change at a corresponding position to be measured of the measured object by using the distance and the temperature respectively measured by the distance measuring unit and the temperature measuring unit; And
And a display unit for displaying a temperature change of the measurement object by a plurality of sections of the measurement object.
3. The method of claim 2,
Wherein the control unit controls the heating cable temperature control device so that the temperature of the corresponding position of the measurement object is the normal temperature range of the measurement object when the temperature of the measurement object falls outside the normal temperature range, And a temperature control unit for controlling the temperature of the optical temperature sensor to be within a predetermined range.
3. The method of claim 2,
Wherein the measurement object temperature change arithmetic unit divides an area of the measurement object into a plurality of sections and calculates a temperature change for each section.
5. The method of claim 4,
Wherein the temperature change per section is a maximum temperature, a minimum temperature, and an average temperature within a measurement period.
3. The method of claim 2,
Further comprising an alarm unit for notifying the temperature of the measured object when the temperature calculated by the temperature change calculation unit is out of a normal temperature range.
delete The method according to claim 1,
And the optical cable is connected to the optical cable connection part only at one side thereof.
The method according to claim 1,
Wherein the optical cable is formed in a loop structure in which both sides of the optical cable are connected to the optical cable connection portion.
The method according to claim 1,
Wherein the optical cable is composed of two or more optical cables, one optical cable operates normally, and the remaining optical cables are configured as spare.
3. The method of claim 2,
The optical fiber cable includes at least two optical cables and measures the distance and temperature of the optical cable using each optical cable. The measurement object temperature change calculation unit averages measurement distances and temperatures of the measured optical cables, And the temperature of the optical temperature sensor is calculated.
The method according to claim 1,
And an RTD (Resistance Temperature Detector) sensor to measure temperature with the RTD sensor when a problem occurs in temperature measurement with the optical cable.
A method of measuring a temperature of a measurement object using an optical cable,
Setting a normal temperature range of the measurement object;
Measuring a specific position and a temperature of the optical cable using scattered light in the optical cable using at least one optical cable installed in the measurement object;
Calculating a temperature of a corresponding region and a corresponding region of the object to be measured;
Determining whether the computation temperature is within the normal temperature range; And
Wherein at least one heating cable is installed in the measurement object to individually control the heating cable when the calculated temperature deviates from the normal temperature range to perform temperature control so that the temperature of the corresponding zone is within the normal temperature range Comprising:
The step of measuring the specific position of the optical cable and the temperature of the optical cable
An internal area of the object to be measured is divided into a plurality of regions at regular intervals through the optical cable buried in the object to be measured in a zigzag fashion,
The step of performing the temperature control
Wherein the temperature control is performed by individually controlling the heating cable installed so that the distance between adjacent lines of the optical cable is staggeredly inserted and disposed between the lines of the zigzag optical cable.
14. The method of claim 13,
And generating an abnormal alarm when the calculated temperature is out of the normal temperature range as a result of the determination. delete

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