KR20070066751A - Apparatus of deformation measurement for underground pipe-line - Google Patents

Abstract

An apparatus for measuring deformation of an underground pipe line is provided to promptly recognize the deformation of the underground pipe line on the ground without damaging the underground pipe line. An apparatus for measuring deformation of an underground pipe line includes a measurement sensor(1) and a measurement unit(2). The measurement sensor includes at least one displacement measurement optical fiber(11) and at least one temperature measurement optical fiber(12). The measurement unit includes a light source generator(21), a deformation analyzing section(22), and a temperature analyzing section(23). The light source generator is connected to ends of the displacement measurement optical fiber and the temperature measurement optical fiber and illuminates light. The deformation analyzing section analyzes the deformation of the underground pipe line by measuring the change of the displacement measurement optical fiber. The temperature analyzing section analyzes leakage of the underground pipe line by analyzing the change of the temperature measurement optical fiber.

Description

Apparatus of deformation measurement for underground pipe-line}

1 shows an overall configuration of a measuring apparatus according to a first embodiment of the present invention,

       1A is a perspective view,

       1B is a cross-sectional view taken along the line A-A of FIG. 1A.

2 shows a state in which the measuring device according to the first embodiment of the present invention is embedded in the ground,

       2a is a section view of the underground,

       2B is a cross-sectional view taken along the line B-B in FIG. 2A.

Figure 3 is a graph showing the change in wavelength according to the temperature change and the displacement of the optical fiber in a communication fiber commonly known.

Figure 4 shows another embodiment of the measuring device of a first embodiment according to the present invention.

       4A is a section view of the underground,

       4B is a cross-sectional view taken along the line C-C in FIG. 4A.

Figure 5 shows the overall configuration of the measuring device according to a second embodiment of the present invention,

       5A is a perspective view,

       5B is a cross-sectional view taken along the line D-D in FIG. 5A.

6 shows a state in which the measurement apparatus according to the second embodiment of the present invention is embedded in the ground,

       6A is a section view of the underground,

       6B is a cross-sectional view taken along the line E-E in FIG. 6A.

Figure 7 shows another embodiment of the measuring device of a second embodiment according to the present invention.

       7A is a sectional view of the underground,

       FIG. 7B is a cross-sectional view taken along the line F-F in FIG. 7A. FIG.

<Explanation of symbols for the main parts of the drawings>

1: Measurement sensor

    11: displacement measurement optical fiber

    12: thermometer side optical fiber

    13: case strip

         131: insertion hole

2: measuring means

    21: light source generator

    22: deformation analysis unit,

    23: temperature analysis unit

    24: heating wire

    25: power supply

3: buried pipe

The present invention relates to a buried pipe deformation measuring apparatus, and more particularly, to a strain measuring device for quickly grasp the deformation of the buried pipe on the ground without damaging the buried pipe.

In general, the buried pipe refers to a pipe for moving fluids. The use of the buried pipe is classified according to the type of the fluid. The buried pipes have water and sewage pipes that are closely related to our lives. In addition, there are industrial tubes and chemicals through tubes.

In the buried pipe, the most important thing is the replacement and repair of the pipe due to deformation and leakage, and since the buried pipe is buried in the ground, it is difficult to identify the deformation and leakage of the buried pipe.

In the related art, an apparatus for measuring deformation and leakage of a buried pipe without developing the naked eye has been developed. As an embodiment, "Measurement method using an optical fiber" of Patent No. 339634, which has been previously filed and registered by the present applicant, and Devices thereof are known.

That is, the conventional measuring method using the optical fiber and the apparatus thereof, the optical fiber representing the change of the light transmitted by the deformation of the tube is integrally attached over the entire length of the tube along the portion not in contact with the fluid passing through the inside of the tube. And measuring the amount of deformation of the tube with the reflected light by allowing the light passing through the optical fiber to be reflected at the end point.

In addition, the optical fiber that is integrally attached over the entire length of the tube along the portion that is not in contact with the fluid passing through the inside of the tube and reflects light at the end, a light source generator for irradiating light to the starting point of the optical fiber and the end of the optical fiber Characterized in that the measuring device for measuring the amount of deformation of the tube consisting of a measuring instrument for receiving and reflecting the light reflected from.

Therefore, by using the measurement method and the device as described above is to have the advantage that can measure the deformation and breakage of the pipe buried in the ground without visual identification.

By the way, when manufacturing a tube wound the optical fiber, a spiral groove is formed along the outer surface of the tube over the entire length of the tube and the optical fiber is buried in the groove, or epoxy or the like is formed on the surface of the tube. Since the method of winding the optical fiber integrally through the adhesive is used, the production of the tube had a very difficult problem.

That is, as described above, when a spiral groove is formed in the tube and an optical fiber is embedded in the groove, the tube has a problem in that a lot of cost and manpower are consumed in forming the groove on the outside of the tube.

In addition, when the groove is formed on the outer side of the tube, the overall strength of the tube is lowered, so that the tube is easily damaged.

On the other hand, when manufacturing a tube for attaching the optical fiber to the outside through the adhesive, such as the epoxy as described later had to have a problem in that a lot of cost and manpower is consumed by applying the optical fiber while applying the adhesive.

Accordingly, the present invention is invented to solve the above problems, by embedding a measuring sensor for measuring the deformation and temperature of the buried pipe in the lower part of the buried pipe to analyze the deformation and leakage of the buried pipe from the ground, It is an object of the present invention to provide a buried pipe deformation measuring apparatus that can quickly detect deformation and leakage of buried pipe and take action without damaging the outer surface of the buried pipe.

In addition, the purpose of this is to accurately analyze the deformation and leakage of the buried pipe by section.

In order to achieve the above object, the present invention provides a measurement sensor comprising at least one displacement measurement optical fiber and at least one thermometer-side optical fiber which is buried in the same direction as the buried pipe in the lower part of the buried pipe buried in the ground; A light source generator connected to one end of the displacement measuring optical fiber and the thermometer optical fiber, and measuring the wavelength of the light reflected from the displacement measuring optical fiber in real time to measure the change of the displacement measuring optical fiber to analyze the deformation of the buried pipe Buried pipe strain measuring apparatus including a strain analyzing unit and a measuring means including a temperature analyzer for analyzing the leakage of the buried pipe by analyzing the change in the thermometer-side optical fiber while measuring the wavelength of the light reflected from the thermometer-side optical fiber in real time; It features.

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

Fig. 1 shows the overall configuration of a measuring device according to a first embodiment of the present invention, in which Fig. 1A is a perspective view and Fig. 1B is a cross-sectional view taken along line A-A in Fig. 1A; FIG. 2 is a view illustrating a state in which a measuring apparatus according to the first embodiment of the present invention is embedded in the ground. FIG. 2A is a cross-sectional view of the ground, and FIG.

Accordingly, the measuring device according to the first embodiment of the present invention, at least one displacement measuring optical fiber 11 and at least one buried in the same direction as the buried pipe 3 in the lower part of the buried pipe 3 buried in the ground The measurement sensor 1 including the above-described thermometer-side optical fiber 12 and one end of the displacement-measured optical fiber 11 and the thermometer-side optical fiber 12 are irradiated with light to irradiate the displacement-measured optical fiber 11 and the thermometer side. By measuring the wavelength of the light reflected from the optical fiber 12 in real time, the measurement means (2) for analyzing the deformation and leakage of the buried pipe (3) by analyzing the changes in the displacement measuring optical fiber (11) and the thermometer-side optical fiber (12) Characterized in that configured.

That is, the measurement sensor 1 includes a case strip 13 provided with a plurality of insertion holes 131 into which the displacement measuring optical fiber 11 and the thermometer optical fiber 12 are inserted. And the case strip 13 is made of a material that can flow.

The displacement measuring optical fiber and the thermometer optical fiber are composed of a communication optical fiber in which the wavelength of the light is reflected at the other end when light is irradiated to one end.

In addition, the measuring means 2 is connected to one end of the displacement measurement optical fiber 11 and the thermometer-side optical fiber 12, the light source generator 21 for irradiating light, and is reflected from the displacement measurement optical fiber 11 The deformation analyzer 22 analyzes the deformation of the buried pipe 3 by measuring the wavelength of the light in real time to measure the change of the displacement measuring optical fiber 11, and the wavelength of the light reflected by the thermometer-side optical fiber 12 in real time. The temperature analysis part 23 analyzes the change of the thermometer side optical fiber 12, and analyzes the leak of the buried pipe 3, while measuring it.

The measuring means 2 analyzes the wavelength of the light reflected from the displacement measuring optical fiber 11 and analyzes the change of the displacement measuring optical fiber 11 to analyze the deformation of the buried pipe 3, and the thermometer-side optical fiber. It is characterized in that it is configured to analyze the leakage of the buried pipe (3) by analyzing the wavelength of the light reflected and input from (12) to analyze the change in the thermometer-side optical fiber (12).

Below. The measurement means configured as above will be described in more detail as follows.

The light source generator 21 of the measuring means 2 is known to irradiate a light source from one end of the displacement measuring optical fiber 11 and the thermometer-side optical fiber 12 is known.

In addition, the deformation analysis unit 22 and the temperature analysis unit 23 constituting the measurement means 2 analyze the wavelength of the light reflected from the displacement measurement optical fiber 11 and change the displacement measurement optical fiber 11. Analyze the deformation of the buried pipe (3), and analyzes the wavelength of the light reflected from the thermometer-side optical fiber 12, the change in the thermometer-side optical fiber (12).

In detail, FIG. 3 is a principle graph showing a change in wavelength according to a displacement and temperature change of an optical fiber in a communication optical fiber, which is commonly known. When the light of one frequency band is irradiated to the optical fiber The wavelength reflected from the optical fiber generates two wavelengths with a fine wavelength and a large amplitude.

That is, one of the two large wavelengths is a wavelength (Brolean) whose position changes when the displacement and temperature of the optical fiber change, and the other wavelength (Raman) is a wavelength whose amplitude changes when the fiber temperature changes. to be.

Therefore, the deformation analysis unit is configured to include a wavelength analysis means for measuring the displacement change of the optical fiber by analyzing the position of the wavelength related to the displacement, the temperature analyzer is analyzed by analyzing the amplitude of the wavelength related to the temperature change of the optical fiber Wavelength analysis means is included to measure the change in temperature, and in the following description of the buried pipe deformation measuring apparatus of the first embodiment according to the present invention, a detailed description of the deformation analysis unit 22 and the temperature analysis unit 23 Is omitted.

Hereinafter, the construction process and the operation relationship of the measuring device of the first embodiment according to the present invention configured as described above are as follows.

First, in the case of constructing the measuring device according to the present invention, as shown in Figures 1 to 3, the measurement means (2) in the lower part of the underground depression in the state of the underground depression where the buried pipe 3 is embedded The integrated displacement measuring optical fiber 11 and the thermometer-side optical fiber 12 connected to each other are constructed. Then, the soil is embedded in the upper part of the displacement measuring optical fiber 11 and the thermometer-side optical fiber 12, and then the embedding pipe 3 is embedded in the upper part of the embedded soil to complete the construction of the measuring apparatus according to the present invention. .

And, when explaining the operation relationship of the measuring device constructed as described above, when the ground subsides due to external causes and the buried pipe (3) is lowered as shown in Figures 1 to 3, The displacement measuring optical fiber 11 provided in the lower part of the pipe 3 causes deformation.

Then, the position of the wavelength reflected by the displacement measuring optical fiber 11 is changed, and the change of the reflected wavelength is analyzed by the deformation analysis unit 22 constituting the measuring means 2 to quickly grasp the current deformation. You can do it.

Therefore, it is possible to take measures to prevent damage to the buried pipe 3 by quickly grasping the deformation of the buried pipe 3 at an early stage when the buried pipe 3 causes deformation.

In addition, when the buried pipe 3 is damaged due to internal pressure or external ground subsidence and a portion of the buried pipe is leaked, as shown in FIGS. 1 to 4, the buried pipe through the leaking liquid The temperature is changed in the thermometer side optical fiber 12 located below (3).

Then, the amplitude of the wavelength reflected from the thermometer-side optical fiber 12 is changed, and the current buried pipe 3 is analyzed by grasping and analyzing the amplitude change of the reflected wavelength by the temperature analyzer 23 constituting the measuring means 2. The leak can be quickly identified.

Therefore, it is possible to minimize the spread of leakage of the buried pipe (3) by quickly grasping the leak of the buried pipe (3) at an early stage.

On the other hand, Figure 4 shows another embodiment of the first embodiment measuring apparatus according to the present invention, Figure 4a is a cross-sectional view of the underground, Figure 4b is a cross-sectional view taken along the line C-C of Figure 4a,

Accordingly, the measuring device of another embodiment according to the first embodiment of the present invention includes the configuration of the first embodiment, and the case strip 13 is an upper portion of the insertion hole 131 provided with the thermometer side optical fiber. The upper portion of the heating wire 24 is further provided to be in close contact, the measuring means 2 further includes a power supply unit 25 for supplying power to the heating wire to increase the temperature of the thermometer-side optical fiber 12 It is characterized by.

That is, in general, when the temperature of the optical fiber is raised, the optical fiber medium is changed, and when the reflected signal is analyzed, the change in temperature is increased. Therefore, if the temperature of the optical fiber on the thermometer side is increased, the amplitude of the reflected light wavelength is increased. If leakage occurs and the temperature of the optical fiber is lowered or raised, the change in temperature is different from the surroundings.

Therefore, it is possible to precisely analyze and measure the leakage of the temperature change of the thermometer-side optical fiber 12.

FIG. 5 shows an overall configuration of a measuring device according to a second embodiment of the present invention, FIG. 5A is a perspective view, and FIG. 5B is a sectional view taken along the line D-D in FIG. 5A; 6 is a view illustrating a state in which a measuring apparatus according to a second embodiment of the present invention is embedded in the ground. FIG. 6A is a cross-sectional view of the ground, and FIG. 6B is a cross-sectional view taken along the line E-E of FIG. 6A.

Accordingly, the measuring device according to the second embodiment of the present invention, at least one displacement measuring optical fiber 11 and at least one which is buried in the same direction as the buried pipe 3 in the lower part of the buried pipe 3 buried in the ground The measurement sensor 1 including the above-described thermometer-side optical fiber 12 and one end of the displacement-measured optical fiber 11 and the thermometer-side optical fiber 12 are irradiated with light to irradiate the displacement-measured optical fiber 11 and the thermometer side. By measuring the wavelength of the light reflected from the optical fiber 12 in real time, the measurement means (2) for analyzing the deformation and leakage of the buried pipe (3) by analyzing the changes in the displacement measuring optical fiber (11) and the thermometer-side optical fiber (12) Characterized in that configured.

In addition, the displacement measuring optical fiber 11 and the thermometer-side optical fiber 12 is composed of a grating optical fiber that reflects light for each section when a plurality of lights having different frequency bands are irradiated at one end.

In addition, the measuring means 2 is connected to one end of the displacement measurement optical fiber 11 and the thermometer-side optical fiber 12, the light source generator 21 for irradiating light, and is reflected from the displacement measurement optical fiber 11 Deformation analysis unit 22 for analyzing the deformation of the displacement measuring optical fiber 11 by measuring the wavelength of light for each section in real time to analyze the deformation of the buried pipe (3), and for each section reflected by the thermometer-side optical fiber 12 The temperature analyzer 23 analyzes the change in the thermometer-side optical fiber 12 while measuring the wavelength of the light in real time to analyze the leakage of the buried pipe 3.

In addition, the displacement measuring optical fiber 11 is formed of a plurality, the measuring means 2 is provided with a plurality of insertion holes 131 into which a plurality of displacement measuring optical fibers 11 and the thermometer-side optical fiber 12 is inserted. The case band 13 is included, and the plurality of insertion holes 131 into which the displacement measuring optical fibers are inserted among the plurality of insertion holes 131 are formed to have different diameters, so that the displacement measuring optical fibers 11 inserted into the respective insertion holes 131 It is installed to be inserted in a straight line so that the length of the measurement section can be different.

In addition, the measuring means 2 analyzes the respective wavelengths of light reflected from the respective displacement measuring optical fibers 11 by section through irradiation of a plurality of light beams having different frequency bands to each of the plurality of displacement measuring optical fibers 11. The variation of each section of the buried pipe 3 is analyzed by analyzing the change in each section of each displacement measuring optical fiber 11. In addition, the measurement means (2), by analyzing the wavelength of each light reflected by the input from the at least one thermometer-side optical fiber 11 for each section to analyze the change in each section of the thermometer-side optical fiber 11 to leak the buried pipe (3) To analyze.

Below. The measurement means configured as described above will be described in more detail as follows.

The light source generator 21 of the measuring means 2 irradiates a plurality of lights having different frequency bands to each of the displacement measuring optical fibers 11, as well as a plurality of different frequency bands at one end of the at least one thermometer-side optical fiber 12. Various types are known to irradiate light.

The deformation analyzer 22 and the temperature analyzer 23 constituting the measuring means 2 are reflected from the displacement measuring optical fiber 11 at respective sections in response to irradiation of a plurality of lights having different frequency bands. Analyze the variation of the displacement measuring optical fiber 11 in each section by analyzing the multiple light wavelengths in each section to analyze the deformation of the buried pipe 3, and at least one thermometer-side optical fiber 12 according to the irradiation of a plurality of lights having different frequency bands. By analyzing a plurality of light wavelengths of each section reflected and input from the) it is possible to analyze the temperature change of the thermometer-side optical fiber 12.

In detail, FIG. 7 is a graph illustrating a change in wavelength according to a displacement change and a temperature change of an optical fiber in a commonly known distributed optical fiber, and the characteristics of the conventionally known lattice optical fiber distribute a plurality of lights having different frequency bands. When irradiated on the type optical fiber, the wavelength reflected in each section of the optical fiber generates two wavelengths having a fine wavelength and a large amplitude in each section.

That is, one of the two large wavelengths generated in each section is a wavelength at which the position is changed when the displacement of the optical fiber is changed, and the other is a wavelength at which the amplitude is changed when the optical fiber temperature is changed.

Therefore, the deformation analysis unit is configured to include a wavelength analysis means for measuring the displacement change of the optical fiber by analyzing the position of the wavelength associated with the displacement of each section of the distributed optical fiber, the temperature analysis unit is configured in each section of the distributed optical fiber Wavelength analysis means is included to measure the temperature change of the optical fiber by analyzing the amplitude of the wavelength associated with the change in the temperature of the star, and in the following description of the buried pipe deformation measuring apparatus of the second embodiment according to the present invention, The detailed description of the analyzer 22 and the temperature analyzer 23 will be omitted.

Hereinafter, the construction process and the operating relationship of the present invention configured as described above are as follows.

First, in the case of constructing the measuring device according to the present invention, as shown in Fig. 5 and 6, in the plated-in underground burial portion in which the buried pipe 3 is embedded in the lower part of the underground depression and measuring means (2) and The displacement measurement optical fiber 11 and the thermometer-side optical fiber 12 to be connected are constructed. Then, after embedding the soil in the upper portion of the optical fiber (2) is to complete the construction of the measuring device according to the present invention by embedding the buried pipe (3) in the upper portion of the embedded soil.

And, when explaining the operation relationship of the measuring device of the second embodiment constructed as described above, first when the ground is settled due to external causes and the buried pipe 3 is settled to the bottom, shown in Figures 5 and 6 As described above, the lattice-shaped displacement measuring optical fiber 11 provided at the lower portion of the buried pipe 3 causes deformation.

Then, the position of the wavelength reflected by each section in each displacement measurement optical fiber 11 is changed, and the variation analysis part 22 constituting the measuring means 2 analyzes the position change of the reflected wavelength by each section. By doing so, it is possible to quickly grasp the change in each section of the current displacement measurement optical fiber (11).

Therefore, it is possible to prevent damage to the buried pipe 3 in advance by quickly grasping the deformation of the buried pipe 3 in each section at an early stage when the buried pipe 3 causes deformation.

In addition, when the buried pipe 3 is partially damaged due to internal pressure or external ground subsidence, and leakage occurs, as shown in FIGS. 5 and 6, the buried pipe 3 is provided through the leaked liquid. The temperature is changed in one or more of the thermometer-side optical fibers 12 located below.

Then, the amplitude of the wavelength reflected by each section in the distributed thermometer-side optical fiber 12 is changed, and the change in the amplitude of the wavelength reflected in each section is analyzed by the temperature analyzer 23 constituting the measuring means 2. By grasping it, the leak of the buried pipe 3 can be known quickly.

Therefore, it is possible to minimize the spread of leakage of the buried pipe (3) by quickly grasping the leak of the buried pipe (3) at an early stage.

Meanwhile, as shown in FIG. 5, when the plurality of distributed displacement measuring optical fibers 11 are penetrated linearly through a plurality of insertion holes 131 having different sizes formed in the case band 13 that is deformable. The following phenomenon occurs.

First, in the distributed displacement measuring optical fiber 11 inserted into the small insertion hole 131, the inner surface of the insertion hole 131 is in close contact with the distributed displacement measuring optical fiber 11 even though the case strip 13 is slightly curved. As the number of parts increases, bending occurs severely in each section.

On the contrary, in the distributed displacement measurement optical fiber 11 inserted into the insertion hole 131 having a large diameter, when the case strip 13 is slightly curved, the inner surface of the insertion hole 131 becomes the lattice type displacement measurement optical fiber 11. On the other hand, the distributed displacement measurement optical fiber 11 causes deformation only when it is severely bent.

Therefore, when the space between the inner surface of the insertion hole 131 and the distributed displacement measurement optical fiber is run, the buried through the change of the wavelength of each section of the distributed displacement measurement optical fiber 11 inserted in the small insertion hole The initial displacement of the tube (up to the break point of the optical fiber) can be measured and inserted into a small insertion hole through a change in the wavelength of each section of the distributed displacement measuring optical fiber 11 inserted into the large insertion hole. By measuring the displacement beyond the measurement range of the distributed displacement measurement optical fiber sensor, the deformation of the buried pipe 3 can be measured more precisely by measuring the large deformation of the buried pipe 3.

Fig. 7 shows another embodiment of the measuring device of a second embodiment according to the present invention. Fig. 7A is a sectional view taken along the ground and Fig. 7B is a sectional view taken along the line F-F in Fig. 7A.

Therefore, the measurement device of another embodiment according to the second embodiment of the present invention, on the premise that the configuration of the second embodiment, the at least one of the insertion hole 131 is provided with a grating-type thermometer side optical fiber A heating wire 24 is further provided on the upper part of the case strip 13, which is an upper part, and the measuring means 2 supplies power to the heating wire 24 to increase the temperature of the thermometer-side optical fiber 12. The power supply unit 25 to be characterized in that it is further included.

Therefore, in general, when the temperature of the optical fiber is raised, the optical fiber medium is changed, and when the reflected signal is analyzed, the change in temperature is increased. Therefore, if the temperature of the optical fiber on the thermometer side is increased, the amplitude of the reflected light wavelength is increased. If leakage occurs and the temperature of the optical fiber is lowered or raised, the change in temperature is different from the surroundings.

Therefore, it is possible to precisely analyze and measure the leakage of the temperature change of the thermometer-side optical fiber 12.

As described above, the present invention prevents the strength of the buried pipe from being weakened by not damaging the outside of the buried pipe, while the buried pipe is deformed and leaked by quickly analyzing the deformation and leakage of the buried pipe. It is effective to provide a buried pipe deformation measuring apparatus that can prevent a disaster in advance.

In addition, by accurately analyzing the deformation and leakage of the buried pipe by section, it is also effective to shorten the repair time of the buried pipe.

While the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include many such variations.

Claims (9)

Measuring sensor (1) including at least one or more displacement measurement optical fibers 11 and at least one or more thermometer-side optical fibers (12) buried in the same direction as the buried pipe (3) buried in the underground buried pipe (3) )Wow, A light source generator 21 connected to one end of the displacement measuring optical fiber and the thermometer optical fiber and irradiating light, and measuring the wavelength of the light reflected by the displacement measuring optical fiber 11 in real time to change the displacement measuring optical fiber 11. The strain analyzer 22 analyzes the deformation of the buried pipe 3 and analyzes the change in the thermometer-side optical fiber 12 while measuring the wavelength of the light reflected from the thermometer-side optical fiber 12 in real time. A buried pipe deformation measuring apparatus comprising a measuring means (2) including a temperature analyzing section (23) for analyzing the leak of (3). According to claim 1, wherein the displacement measuring optical fiber 11 and the thermometer-side optical fiber 12, The buried pipe strain measuring device, characterized in that consisting of a communication optical fiber that reflects the wavelength of light at the other end once the light is irradiated. The method of claim 2, wherein the measuring means 2, Buried pipe deformation measuring apparatus characterized in that it comprises a case strip 13 is provided with a plurality of insertion holes (131) into which the displacement measuring optical fiber (11) and the thermometer-side optical fiber (12). The method according to claim 2 or 3, wherein the measuring means 2 Analyzes the deformation of the buried pipe 3 by analyzing the most ideal wavelength among the wavelengths of the light reflected from the displacement measuring optical fiber 11 and analyzes the most ideal wavelength among the wavelengths of the light reflected and input from the thermometer-side optical fiber 12. Buried pipe deformation measuring apparatus, characterized in that for analyzing the leakage of the buried pipe (3). The method of claim 4, wherein the buried pipe deformation measuring apparatus, A heating wire 24 provided in close contact with an upper portion of the insertion hole 131 provided with the thermometer side optical fiber 11, Buried pipe deformation measuring apparatus further comprises a power supply (25) included in the measuring means (2) to supply power to the heating wire (24) to increase the temperature of the thermometer-side optical fiber (11). According to claim 2, wherein the displacement measuring optical fiber 11 and the thermometer-side optical fiber 12, Buried pipe strain measurement device, characterized in that consisting of a grating optical fiber that reflects light for each section when a plurality of lights of different frequency bands at one end is irradiated. 7. The displacement measuring optical fiber of claim 6 is formed in plural, The measuring means 2 includes a case strip 13 having a plurality of insertion holes 131 into which a plurality of displacement measuring optical fibers 11 and thermometer-side optical fibers 12 are inserted, Among the plurality of insertion holes 131, the plurality of insertion holes 131 into which the displacement measurement optical fiber is inserted are formed to have different diameters so that the displacement measurement optical fiber 11 inserted into each of the plurality of insertion holes 131 may have different lengths in the measurement section. Buried pipe deformation measuring apparatus characterized in that it is mounted to be inserted into. The method of claim 6 or 7, wherein the measuring means (2) Through the irradiation of a plurality of light beams of different frequency bands to each of the plurality of displacement measuring optical fibers 11, the most ideal wavelength among the wavelengths of light reflected by each of the displacement measuring optical fibers 11 and inputted is analyzed to A buried pipe characterized by analyzing the deformation of each section, and analyzing the leakage of each section of the buried pipe (3) by analyzing the most ideal wavelength among the optical wavelengths of each section reflected and input from the thermometer-side optical fiber (11) Strain measurement device. According to claim 8, The buried pipe deformation measuring device, The heating wire 24 is provided in close contact with the upper portion of the insertion hole 131 provided with the thermometer-side optical fiber, and included in the measuring means (2) to supply power to the heating wire 24 of the thermometer-side optical fiber 12 Buried pipe deformation measuring apparatus further comprises a power supply unit 25 for increasing the temperature.

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