Optical fiber sensing testing device for testing deformation of underground building

Abstract

The invention relates to the technical field of optical fiber sensing testing, in particular to an optical fiber sensing testing device for testing deformation of an underground building, which comprises a grating demodulator and a heat dissipation fan mounted in the grating demodulator, a plurality of interfaces are arranged on two sides of the grating demodulator, and a support is rotationally opened and is in contact with a stop block to support the grating demodulator. The grating demodulator is obliquely placed on a testing site, the grating demodulator has the advantage of being convenient to operate, the grating demodulator can be conveniently lifted and carried through the support, the grating demodulator has the advantage of being convenient to carry, the interface of the grating demodulator is covered with the sponge piece, it is ensured that the interface is not polluted by dust and impurities, and the grating demodulator is convenient to carry. By adjusting the placing position and the placing angle of the optical fiber connector connecting line, the optical fiber connector connecting line does not shield a display screen of the optical fiber grating demodulator, and by clamping and fixing the optical fiber connector connecting line, the optical fiber connecting line is prevented from loosening and falling off from an interface of the optical fiber grating demodulator on the premise that the optical fiber connecting line is interfered by external force.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber sensing testing, and in particular to an optical fiber sensing testing device for testing deformation of underground buildings. Background Art

[0002] Fiber optic sensing includes two functions: perception and transmission of external signals. The so-called perception means that the external signal changes the physical characteristic parameters of the light wave transmitted in the optical fiber, such as intensity, wavelength, frequency, phase and polarization state, according to its changing law. Fiber optic sensing technology includes two aspects: modulation and demodulation, namely, the modulation technology of how the external signal modulates the light wave parameters in the optical fiber and the demodulation technology of how to extract the external signal from the modulated light wave.

[0003] The principle of fiber Bragg grating demodulator is to use the reflection characteristics of fiber Bragg grating, the coherent light interference phenomenon of interferometer and the spectrum measurement ability of spectrum analyzer to achieve accurate measurement of the changes of the measured structure.

[0004] During use, the traditional fiber grating demodulator needs to be carried to the test site and connected to the fiber optic sensor wires to test the deformation of underground buildings. During the test, the tester needs to hold it with one hand, which is inconvenient to operate. Due to the chaotic environment and high air pollution at the test site, dust and impurities can easily enter the interface of the fiber grating demodulator, resulting in poor contact after the fiber connector is inserted into the interface. In addition, due to the different positions of the fiber connectors and the need to connect multiple fiber connectors to the fiber grating demodulator at the same time, the scattered connecting wires not only easily block the display screen of the fiber grating demodulator and affect the observation of test data, but also cause the connector to loosen and fall off from the interface of the fiber grating demodulator under the influence of external forces such as pulling, resulting in damage to the data being tested. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a fiber optic sensing test device for testing the deformation of underground buildings, which can effectively solve the problem of the inconvenience of using the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides an optical fiber sensing test device for testing deformation of underground buildings, comprising a grating demodulator and a heat dissipation fan installed in the grating demodulator, a plurality of interfaces are arranged on both sides of the grating demodulator, and blocks are fixedly installed on both sides of the grating demodulator. A cleaning component comprises triangular prisms installed on both sides of the grating demodulator, and also comprises exhaust strips arranged above and below the corresponding triangular prisms to blow air on both sides of the triangular prisms, and the two exhaust strips are both connected with the output end of the heat dissipation fan. A supporting component comprises a rotating ring rotatably installed on both sides of the grating demodulator, and the outer ring walls of the two rotating rings are both centrally symmetrically installed with fixed cylinders and fixed rods, and the inner side walls of the two fixed cylinders are both installed with sponge sheets, and the ends of the two fixed cylinders away from the rotating rings are elastically installed with telescopic rods. A baffle is fixedly connected between the two telescopic rods. When the telescopic rod is rotated to be parallel to the grating demodulator, the sponge sheet covers several interfaces, and the baffle sheet contacts the bottom of the grating demodulator. When the telescopic rod is rotated to be perpendicular to the grating demodulator, the sponge sheet slides over the surface of the triangular prism, and the fixed rod contacts the corresponding baffle. The wire-hanging assembly includes two linear telescopic nut seats slidably installed between the two fixed rods, and wire-hanging seats are rotatably provided on the two nut seats. Two first wire clamping heads are fixedly provided on the two wire-hanging seats, and a second wire clamping head is slidably provided on one side of the first wire clamping head. When the position of the second wire clamping head is fixed, the corresponding rotation angle of the wire-hanging seat is synchronously fixed.

[0008] Furthermore, several of the interfaces are electrically connected to the grating demodulator, and several of the interfaces located on the same side are linearly distributed, and the opening sizes are smaller than the width of the sponge sheet, and the two exhaust strips are provided with exhaust outlets connected to the output end of the cooling fan, and filters are embedded in the two exhaust outlets.

[0009] Furthermore, the support assembly also includes limit members fixedly installed on both sides of the grating demodulator, the two rotating rings are respectively rotatably mounted on the corresponding limit members, the two fixed cylinders are each provided with a socket at one end away from the rotating ring, the two telescopic rods are respectively inserted into the corresponding sockets, and springs are installed between the two telescopic rods and the corresponding sockets, and a support roller with a surface contour exceeding the telescopic rod is rotatably installed between the two telescopic rods.

[0010] Furthermore, the wire-string assembly also includes a double-ended screw rotatably mounted between two fixed rods, wherein an outer wall of one of the fixed rods is also rotatably mounted with a crank fixedly connected to one end of the double-ended screw, and the two nut seats are respectively threadedly mounted on the two ends of the double-ended screw.

[0011] Furthermore, a guide rod is fixedly connected between the two fixed rods, and a sliding sleeve on the guide rod is provided with two limit sleeves respectively fixed to the corresponding nut seats. Positioning seats are fixedly installed on the outer ring walls of the two nut seats, and circular holes are provided on the tops of the two positioning seats, and annular grooves are provided on the inner hole walls of the two circular holes.

[0012] Furthermore, the two cable mounting seats are both truncated cone-shaped in design, and the bottoms are inserted into corresponding circular holes. A movable cavity is provided at the tops of the cable mounting seats. The bottoms of the two cable mounting seats are both fixedly sleeved with limit rings, and the two limit rings are rotatably installed in corresponding annular grooves respectively.

[0013] Furthermore, two cable racks are centrally symmetrically installed on the outer ring walls of the two cable racks, a first cable clamp is fixedly installed on the top of the four cable racks, a cavity connected to the active cavity is opened in the four cable racks, and a sliding hole is opened through the cavity on the top of the cable racks.

[0014] Furthermore, a synchronous fixing component is provided in each of the two active cavities, and each of the two synchronous fixing components includes a gear rotatably arranged in the active cavity, a square sleeve is fixedly installed on the bottom end of the two gears, a square head is slidably inserted under the two square sleeves, a threaded head that penetrates the wire rack seat is installed on the bottom end of the two square heads, and the two threaded heads are in conflict with the corresponding bottom of the circular hole cavity, and the outer ring walls of the two gears are symmetrically meshed with two racks, and the four racks extend into the corresponding cavity at one end away from the corresponding gear, and are connected to a second wire clamping head through the corresponding sliding hole.

[0015] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0016] 1. The brackets are rotated and installed on both sides of the grating interrogator. When the grating interrogator is tested at the test site, the brackets are rotated to open and the grating interrogator is tilted and placed at the test site by interfering with the block. The operator does not need to hold it, so that the operator can free his hands for other operations, which has the advantage of convenient operation. In addition, when the grating interrogator is carried and transported, the bracket is rotated to be parallel to the grating interrogator, and the grating interrogator can be lifted and carried by the bracket, which has the advantage of convenient carrying;

[0017] 2. A sponge sheet is arranged on the inner wall of the bracket. When the bracket is rotated to be parallel to the grating demodulator, the sponge sheet can cover multiple interfaces of the grating demodulator, thereby preventing dust and impurities from entering the interfaces and affecting the smooth access of the optical fiber connector. At the same time, triangular prisms are arranged on both sides of the grating demodulator. When the bracket is rotated to adjust the shape, the sponge sheet will slide over the surface of the triangular prism to scrape off the dust and impurities carried by the sponge sheet itself, ensuring that the sponge sheet covering the interface remains clean and does not pollute the interface. In addition, a heat dissipation fan for dissipating heat in the grating demodulator is arranged in the grating demodulator, and the output end of the heat dissipation fan is connected to an exhaust strip. The exhaust strip is opposite to the two sides of the triangular prism. The hot air discharged from the exhaust strip will blow away the dust and impurities remaining on the surface of the triangular prism due to the scratching of the sponge sheet, ensuring that the surface of the triangular prism remains clean, so that the sponge sheet will not be stained with dust and impurities on the surface of the triangular prism when it scratches the triangular prism next time.

[0018] 3. A wire rack assembly connected to the bracket is arranged on the top of the grating demodulator. The wire rack assembly mainly includes a wire rack seat which can linearly reciprocate to adjust the lateral position and the rotation angle. The wire rack seat is provided with a wire clamping head which can adjust the mutual spacing and clamp and fix the optical fiber connecting line. The wire rack seat with the adjusted rotation angle can be limited and fixed by the synchronous fixing assembly while the spacing between the two wire clamping heads is determined. By adjusting and fixing the optical fiber connecting line, the obstruction affecting the display screen data observation of the optical fiber Bragg grating demodulator can be avoided. At the same time, the optical fiber connecting line can be prevented from loosening and falling off from the interface of the optical fiber Bragg grating demodulator under the premise of being interfered by external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall carrying state structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall test state structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the support assembly structure of the present invention;

[0023] Figure 4 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0024] Figure 5 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0025] Figure 6 It is a schematic diagram of the structure of the wiring assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the installation structure of the first clamping head and the second clamping head of the present invention;

[0027] Figure 8 For the present invention Figure 6 Enlarged structural diagram at point C in the middle.

[0028] The numbers in the figure represent:

[0029] 1. Grating demodulator; 11. Triangular prism; 12. Exhaust strip; 13. Filter; 14. Stopper;

[0030] 21. Limiting member; 22. Rotating ring; 23. Fixed cylinder; 24. Sponge sheet; 25. Telescopic rod; 26. Spring; 27. Support roller; 28. Stop bar; 29. ​​Fixed rod;

[0031] 31. Double-ended screw rod; 32. Crank handle; 33. Nut seat; 34. Guide rod; 35. Limit sleeve; 36. Positioning seat; 37. Annular groove;

[0032] 4. Wire rack; 41. Active cavity; 42. Limit ring; 43. Wire rack; 44. First wire clamp; 45. Sliding hole;

[0033] 51. Gear; 52. Square sleeve; 53. Square head; 54. Threaded head; 55. Rack; 56. Second thread clamp; 57. Knob. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The present invention will be further described below in conjunction with the embodiments.

[0036] Embodiment 1:

[0037] Reference Figure 1-8, which is the first embodiment of the present invention, a fiber optic sensing test device for testing the deformation of underground buildings, includes a grating demodulator 1 and a heat dissipation fan installed in the grating demodulator 1, the bottom end of the grating demodulator 1 is designed as an inclined surface to increase the contact area with the ground, a plurality of interfaces are arranged on both sides of the grating demodulator 1, and blocks 14 are fixedly installed on both sides of the grating demodulator 1. The cleaning component includes a triangular prism 11 installed on both sides of the grating demodulator 1, and also includes exhaust strips 12 arranged above and below the corresponding triangular prism 11 to blow air on both sides of the triangular prism 11. The two exhaust strips 12 are both connected to the output end of the heat dissipation fan. Since the heat dissipation fan works for a long time, the spray cleaning of dust and impurities on the surface of the triangular prism 11 is also continuously carried out. The supporting component includes a rotating ring 22 rotatably installed on both sides of the grating demodulator 1, and the outer ring walls of the two rotating rings 22 are both centrally symmetrically installed with fixed cylinders 23 and fixed rods 29. The inner walls of the two fixed cylinders 23 are both installed with sponge sheets 24, and the sponge sheets 24 are bonded by glue. The sponge sheet 24 is attached to the inner wall of the fixed cylinder 23, so it can be replaced regularly. The ends of the two fixed cylinders 23 away from the rotating ring 22 are elastically installed with telescopic rods 25. A baffle 28 is fixedly connected between the two telescopic rods 25. When the telescopic rod 25 rotates to be parallel to the grating demodulator 1, the sponge sheet 24 covers several interfaces, and the baffle 28 contacts the bottom of the grating demodulator 1. When the telescopic rod 25 rotates to be perpendicular to the grating demodulator 1, the sponge sheet 24 slides over the surface of the triangular prism 11, and the fixed rod 29 and The corresponding blocks 14 are in conflict with each other, and the cable-hanging assembly includes two linear telescopic nut seats 33 slidably installed between the two fixed rods 29. The two nut seats 33 are rotatably provided with cable-hanging seats 4. Two first cable clamping heads 44 are fixedly provided on the two cable-hanging seats 4. A second cable clamping head 56 is slidably provided on one side of the first cable clamping head 44. When the position of the second cable clamping head 56 is fixed, the rotation angle of the corresponding cable-hanging seat 4 is synchronously fixed, which reduces the operation steps and improves the efficiency of the preparation work before the test.

[0038] Embodiment 2:

[0039] Reference Figure 1-4, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: a plurality of interfaces are electrically connected to the grating demodulator 1, and a plurality of interfaces located on the same side are linearly distributed, and the opening size is smaller than the width of the sponge sheet 24, ensuring that the sponge sheet 24 can be fully covered, and an exhaust port connected to the output end of the heat dissipation fan is opened on the two exhaust strips 12, and a filter screen 13 is embedded in the two exhaust ports to prevent dust and impurities from entering the grating demodulator 1 when the heat dissipation fan is not started. The support assembly also includes a filter 13 fixedly installed on the optical The limit pieces 21 on both sides of the grating demodulator 1, the two rotating rings 22 are respectively rotatably mounted on the corresponding limit pieces 21, the two fixed cylinders 23 are provided with sockets at one end away from the rotating rings 22, the two telescopic rods 25 are respectively inserted into the corresponding sockets, and springs 26 are installed between the two telescopic rods 25 and the corresponding sockets, and a support roller 27 with a surface contour exceeding the telescopic rod 25 is rotatably installed between the two telescopic rods 25 to ensure that when the grating demodulator 1 is in the final placement state, the support roller 27 and the bottom inclined surface are in contact with the ground, ensuring that the grating demodulator 1 is tilted.

[0040] The remaining structures are the same as those of Example 1.

[0041] Embodiment 3:

[0042] Reference Figure 1-35-7 is the third embodiment of the present invention, which is different from the second embodiment in that: the wire stringing assembly also includes a double-headed screw 31 rotatably installed between the two fixed rods 29, the double-headed screw 31 is a screw with opposite spiral directions at both ends, which belongs to the prior art in this technical field, is not the key to the innovation of the present invention, and is not elaborated in detail. The outer wall of one of the fixed rods 29 is also rotatably installed with a crank 32 fixedly connected to one end of the double-headed screw 31, so as to facilitate the rotation of the double-headed screw 31. Two nut seats 33 are respectively threadedly mounted on the two ends of the double-headed screw 31. A guide rod 34 is also fixedly connected between the two fixed rods 29. Two limiting sleeves 35 fixed to the corresponding nut seats 33 are slidably mounted on the guide rod 34. The outer diameter of the guide rod 34 is consistent with the inner diameter of the limiting sleeve 35, so as to ensure that the linear movement of the nut seat 33 is stable and reliable. The outer ring wall is fixedly installed with a positioning seat 36, the top of the two positioning seats 36 is provided with a circular hole, the inner wall of the two circular holes is provided with an annular groove 37, the two cable mounting seats 4 are both designed in a truncated cone shape, and the bottom is inserted into the corresponding circular hole, the top of the cable mounting seat 4 is provided with an active cavity 41, the bottom of the two cable mounting seats 4 is fixedly sleeved with a limit ring 42, so that the cable mounting seat 4 can rotate relative to the positioning seat 36 without squeezing and interfering with the threaded head 54, thereby adjusting the direction of clamping the optical fiber connector connecting line, the two limit rings 42 are rotatably installed in the corresponding annular groove 37 respectively, the outer ring wall of the two cable mounting seats 4 are centrally symmetrically installed with two cable mounting platforms 43, the top of the four cable mounting platforms 43 are fixedly installed with a first cable clamping head 44, the four cable mounting platforms 43 are provided with a cavity connected to the active cavity 41, and the top of the cable mounting platform 43 is provided with a sliding hole 45 running through the cavity.

[0043] The remaining structure is the same as that of Example 2.

[0044] Embodiment 4:

[0045] Reference Figure 6-8, which is the fourth embodiment of the present invention, and this embodiment is different from the third embodiment in that: a synchronous fixing assembly is provided in each of the two active chambers 41, and each of the two synchronous fixing assemblies includes a gear 51 rotatably provided in the active chamber 41, and a positioning block is installed in the active chamber 41 to limit the position of the gear 51, and the gear 51 is only allowed to rotate with the thread head 54 as the center of the circle, and the bottom ends of the two gears 51 are fixedly installed with a square sleeve 52, and the two square sleeves 52 are slidably inserted with a square head 53, and the bottom ends of the two square heads 53 are installed with a threaded head 54 that penetrates the cable rack 4. 4. Both threaded heads 54 are in conflict with the bottom of the corresponding circular hole. When the threaded heads 54 are gradually extended, the square heads 53 will also slide relative to the corresponding square sleeves 52. The outer ring walls of the two gears 51 are both centrally symmetrically meshed with two racks 55. A sleeve is provided in the movable cavity 41 to facilitate the telescopic sliding of the racks 55, thereby improving the telescopic sliding stability of the racks 55. The ends of the four racks 55 away from the corresponding gears 51 are all extended into the corresponding cavities, and the second clamping heads 56 are connected to the corresponding sliding holes 45. A knob 57 is installed on the top of the gear 51.

[0046] The remaining structure is the same as that of Example 3.

[0047] Working principle of the present invention:

[0048] The first step is to pull up the guide rod 34, place the grating demodulator vertically and carry it to the test site, hold the guide rod 34 with one hand, and pull the support roller 27 with the other hand, so that the telescopic rod 25 extends out of the corresponding fixed cylinder 23 to increase the length. At this time, the corresponding spring 26 will be forced to stretch, and the blocking bar 28 will no longer fit the bottom of the grating demodulator 1. At this time, the rotating ring 22 is rotated, that is, the fixed cylinder 23, the sponge sheet 24, the telescopic rod 25, the support roller 27 and the fixed rod 29 are rotated synchronously until the fixed rod 29 rotates to a state of conflict with the block 14. At this time, the grating demodulator 1 can be tilted and placed at the test site through the lower bottom inclined surface of the grating demodulator 1 and the support roller 27, without the need for the tester to hold it;

[0049] In the second step, the sponge sheet 24 will slide over the surfaces of the triangular prisms 11 on both sides of the grating demodulator 1 during the rotation process, thereby scraping off the dust and impurities attached to the sponge sheet 24, so that the sponge sheet 24 remains clean and does not contaminate the optical fiber interface of the grating demodulator 1;

[0050] The third step is to adjust the placement position of the grating demodulator 1 according to the position of the optical fiber connector to be connected on site, and then insert the optical fiber connector into the corresponding interface on the grating demodulator 1, and place the connecting line of the optical fiber connector between the corresponding first clamping head 44 and the second clamping head 56. At this time, according to actual needs, adjust the rotation angle between each cable rack 4 and the positioning seat 36, and drive the gear 51, square sleeve 52, square head 53 and threaded head 54 to rotate by rotating the knob 57 clockwise. Since the threaded head 54 itself is a thread that penetrates the cable rack 4, it will directly contact the corresponding annular groove 37 on the positioning seat 36, so that the cable rack 4 and the positioning seat 36 remain fixed. In this process, the rotation of the gear 51 will also engage and drive the corresponding rack 55 to move linearly, thereby driving the corresponding second clamping head 56 to slide in the corresponding sliding hole 45, reducing the distance between the corresponding first clamping head 44, so that the optical fiber connector connecting line is clamped and fixed;

[0051] Step 4: At this time, the optical fiber connector cable will be partially blocked on the display screen of the grating demodulator 1, affecting the observation of the test data. At this time, the double-headed screw 31 can be driven to rotate by rotating the crank 32, and the guide rod 34 and the limit sleeve 35 can be cooperated to slide in a limited manner, thereby driving the two nut seats 33 to move linearly along the axial direction of the double-headed screw 31, and adjusting the placement of the optical fiber connector cable to avoid blocking and affecting the display screen data observation of the optical fiber grating demodulator;

[0052] The fifth step is to start the grating demodulator 1 to detect the deformation data of the underground building. The working principle of the grating demodulator 1 is that the light source emits broadband light, which produces strong reflection after passing through the fiber grating. After the reflected light enters the demodulator, it is divided into two coherent light beams. The two coherent light beams pass through the reference fiber grating and the measuring fiber grating respectively. Since the periodic refractive index changes of the reference fiber grating and the measuring fiber grating are different, the two coherent light beams will have different phase shifts after passing through their respective gratings. The two coherent light beams interfere in the interferometer to form alternating light and dark interference fringes. The frequency of alternating light and dark of the interference fringes is closely related to the phase difference of the two coherent light beams. The phase difference of the two coherent light beams can be obtained by measuring the interference fringes with a spectrum analyzer. Since the wavelength of the light source and the periodic refractive index change of the fiber grating are known, the strain or temperature change of the measured fiber grating can be calculated. By real-time monitoring of the change of the interference fringes, the change of the measured structure, such as strain, temperature, etc., can be obtained. During the test, the heat dissipation fan located in the grating demodulator 1 is started normally, and the heat in the grating demodulator 1 is discharged through the exhaust strip 12. The hot air discharged from the exhaust strip 12 is directly blown to the two oblique surfaces of the corresponding triangular prism 11, and the dust and impurities left on the surface of the triangular prism 11 due to the scratching of the sponge sheet 24 are blown away, ensuring that the surface of the triangular prism 11 remains clean;

[0053] Step 6. After the test is completed, adjust the position of the second wire clamp 56, and take out the optical fiber connector from the interface of the grating demodulator 1, and then take out the connecting wire of the grating demodulator 1 from between the two wire clamps. At this time, hold the guide rod 34 with one hand again, and hold the support roller 27 with the other hand to deform the spring 26, and rotate the rotating ring 22 to rotate the baffle 28 to a position that fits the bottom of the grating demodulator 1. During this process, the sponge sheet 24 will be reversed and swiped away from the surface of the triangular prism 11 again, scraping off the dust and impurities on the surface of the sponge sheet 24, ensuring that the sponge sheet 24 remains clean and covers multiple interfaces of the grating demodulator 1, ensuring that during the movement and storage of the grating demodulator 1, dust and impurities will not enter the interface and affect the smooth connection of the optical fiber connector.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fiber optic sensor testing device for testing deformation of underground buildings, comprising a grating demodulator (1) and a heat dissipation fan installed in the grating demodulator (1), wherein a plurality of interfaces are arranged on both sides of the grating demodulator (1), and blocks (14) are fixedly installed on both sides of the grating demodulator (1), characterized in that: Also includes: A cleaning component comprises triangular prisms (11) mounted on both sides of a grating demodulator (1), and also comprises exhaust strips (12) arranged above and below the corresponding triangular prisms (11) for blowing air to both sides of the triangular prisms (11), wherein both exhaust strips (12) are connected to an output end of a heat dissipation fan; A support assembly comprises a rotating ring (22) rotatably mounted on both sides of a grating demodulator (1), the outer ring walls of the two rotating rings (22) are both centrally symmetrically mounted with a fixed cylinder (23) and a fixed rod (29), the inner side walls of the two fixed cylinders (23) are both mounted with a sponge sheet (24), the ends of the two fixed cylinders (23) away from the rotating ring (22) are both elastically mounted with a telescopic rod (25), a baffle (28) is fixedly connected between the two telescopic rods (25), when the telescopic rod (25) is rotated to a state parallel to the grating demodulator (1), the sponge sheet (24) covers a plurality of interfaces, the baffle (28) contacts the bottom of the grating demodulator (1), when the telescopic rod (25) is rotated to a state perpendicular to the grating demodulator (1), the sponge sheet (24) slides over the surface of the triangular prism (11), and the fixed rod (29) contacts the corresponding baffle (14); The wire-hanging assembly comprises two linear telescopic nut seats (33) slidably installed between two fixed rods (29); a wire-hanging seat (4) is rotatably arranged on the two nut seats (33); two first wire clamping heads (44) are fixedly arranged on the two wire-hanging seats (4); a second wire clamping head (56) is slidably arranged on one side of the first wire clamping head (44); when the position of the second wire clamping head (56) is fixed, the rotation angle of the corresponding wire-hanging seat (4) is synchronously fixed.

2. The optical fiber sensing test device for testing deformation of underground buildings according to claim 1, characterized in that: The plurality of interfaces are electrically connected to the grating demodulator (1), and the plurality of interfaces located on the same side are linearly distributed, and the opening sizes are smaller than the width of the sponge sheet (24), and the two exhaust strips (12) are each provided with an exhaust port connected to the output end of the heat dissipation fan, and the two exhaust ports are each embedded with a filter screen (13).

3. The optical fiber sensing test device for testing deformation of underground buildings according to claim 1, characterized in that: The support assembly also includes limiters (21) fixedly mounted on both sides of the grating demodulator (1); the two rotating rings (22) are respectively rotatably mounted on the corresponding limiters (21); and the two fixed cylinders (23) are each provided with a socket at one end away from the rotating ring (22).

4. The optical fiber sensing test device for testing deformation of underground buildings according to claim 3, characterized in that: The two telescopic rods (25) are respectively inserted into corresponding sockets, and springs (26) are installed between the two telescopic rods (25) and the corresponding sockets. A support roller (27) with a surface profile exceeding that of the telescopic rod (25) is rotatably installed between the two telescopic rods (25).

5. The optical fiber sensing test device for testing deformation of underground buildings according to claim 1, characterized in that: The stringing assembly also includes a double-ended screw (31) rotatably mounted between two fixed rods (29), wherein an outer wall of one of the fixed rods (29) is also rotatably mounted with a crank (32) fixedly connected to one end of the double-ended screw (31), and the two nut seats (33) are respectively threadedly mounted on the two ends of the double-ended screw (31).

6. The optical fiber sensing test device for testing deformation of underground buildings according to claim 5, characterized in that: A guide rod (34) is fixedly connected between the two fixing rods (29), and two limiting sleeves (35) are slidably mounted on the guide rod (34) and are respectively fixed to the corresponding nut seats (33). Positioning seats (36) are fixedly mounted on the outer ring walls of the two nut seats (33), and circular holes are formed at the tops of the two positioning seats (36), and annular grooves (37) are formed on the inner hole walls of the two circular holes.

7. The optical fiber sensing test device for testing deformation of underground buildings according to claim 6, characterized in that: The two cable mounting seats (4) are both designed in a truncated cone shape, and the bottoms are inserted into corresponding circular holes. A movable cavity (41) is provided at the top of the cable mounting seat (4). The bottoms of the two cable mounting seats (4) are both fixedly sleeved with limit rings (42), and the two limit rings (42) are rotatably mounted in corresponding annular grooves (37).

8. The optical fiber sensing test device for testing deformation of underground buildings according to claim 7, characterized in that: Two wiring platforms (43) are centrally symmetrically mounted on the outer ring walls of the two wiring bases (4); a first wire clamping head (44) is fixedly mounted on the top of the four wiring platforms (43); a cavity communicating with the active cavity (41) is provided in the four wiring platforms (43); and a sliding hole (45) is provided on the top of the wiring platforms (43) through the cavity.

9. The optical fiber sensing test device for testing deformation of underground buildings according to claim 8, characterized in that: Both active chambers (41) are provided with synchronous fixing components, and both synchronous fixing components include gears (51) rotatably arranged in the active chamber (41), and square sleeves (52) are fixedly installed at the bottom ends of the two gears (51), and square heads (53) are slidably inserted under the two square sleeves (52).

10. According to claim 9, a fiber optic sensing test device for testing the deformation of underground buildings, the bottom ends of the two square heads (53) are each installed with a threaded head (54) that penetrates the cable holder (4) through a thread, and the two threaded heads (54) are both in conflict with the bottom of the corresponding circular hole cavity, and the outer ring walls of the two gears (51) are both centrally symmetrically meshed with two racks (55), and the four racks (55) extend into the corresponding cavity at one end away from the corresponding gear (51), and are connected to a second wire clamping head (56) through the corresponding sliding hole (45), and a knob (57) is installed on the top of the gear (51).

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