Tunnel wall crack detection device based on distributed optical fiber sensing system

Abstract

The utility model discloses a tunnel wall crack detection device based on a distributed optical fiber sensing system, which comprises a bottom plate, the top of the bottom plate is fixedly provided with a bottom supporting plate, the top of the bottom supporting plate is provided with a combination assembly, the inner side end of a moving plate is fixedly provided with a clamping plate, and the inner side end of the moving plate is provided with a clamping groove. The outer side of the moving plate is attached to the inner wall of the bottom supporting plate, and the tunnel wall crack detection device comprises the tunnel wall crack detection technology field. According to the tunnel wall crack detection device based on the distributed optical fiber sensing system, the movable plate drives the clamping plates to synchronously and reversely move, the clamping plates on the two sides clamp the two sides of an optical fiber sensor so that the optical fiber sensor can be fixed, the optical fiber sensor is fixed to the inner wall of a tunnel through the paired clamping plates on the inner side, and during maintenance, the clamping plates are not prone to falling off. And the fixation of the clamping plate can be released only by screwing the first knob, and the optical fiber sensor can be detached, so that the purpose of convenient maintenance and replacement of the optical fiber sensor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel wall crack detection, in particular to a tunnel wall crack detection device based on a distributed optical fiber sensing system. Background Art

[0002] Distributed fiber optic sensors are sensors that use optical fibers as sensing elements and sense external physical quantities by measuring changes in optical signals in the optical fibers. In structural health monitoring, distributed fiber optic sensors can be used to measure parameters such as strain and temperature of structures such as bridges and buildings, thereby achieving real-time monitoring and evaluation of the structural health status.

[0003] Existing distributed optical fiber sensors are generally installed directly on the tunnel wall through fixing tools during installation. Although this method has a good fixing effect, when the distributed optical fiber sensor needs to be repaired or replaced, the existing fixing method is not convenient for disassembling the distributed optical fiber sensor, resulting in inconvenience in repair and replacement.

[0004] To this end, the utility model provides a tunnel wall crack detection device based on a distributed optical fiber sensing system to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a tunnel wall crack detection device based on a distributed optical fiber sensing system, which solves the above-mentioned problems.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a tunnel wall crack detection device based on a distributed optical fiber sensing system, comprising a base plate, a bottom support plate is fixedly installed on the top of the base plate, a combination component is arranged on the top of the bottom support plate, a combination support plate is fixedly installed on the top of the combination component, an arc plate is fixedly installed on the top of the combination support plate, the bottom support plate, the combination support plate and the inner sides of the arc plate are all provided with fixing components, an adjustment component is arranged between the two combination support plates, the fixing component comprises a side plate, the side plate is fixedly installed on the inner side of the bottom support plate, a first screw is rotatably connected between the two side plates, two movable plates are screwed on the outer side of the first screw, a clamping plate is fixedly installed on the inner end of the movable plate, and the outer side of the movable plate is fitted with the inner wall of the bottom support plate.

[0007] Preferably, the threads on both sides of the center of the first screw have different rotation directions, and the two movable plates are respectively screwed to the outsides of two threads with different rotation directions on the outside of the first screw.

[0008] By adopting the above technical solution, the two movable plates can move synchronously in opposite directions by rotating the first screw.

[0009] Preferably: the splint is an arc plate, the two opposite splints are symmetrical to each other and the recessed positions are opposite, the outer side of the side plate is rotatably connected to a first knob, a rotating shaft is fixedly installed between the first knob and the corresponding first screw, and the rotating shaft is rotatably connected to the inside of the side plate.

[0010] By adopting the above technical solution, the optical fiber sensor passing through the clamp is fixed by the clamp.

[0011] Preferably, the combined assembly comprises an upper plate and a lower plate, the upper plate is fixedly mounted on the bottom of the combined support plate, the lower plate is fixedly mounted on the top of the bottom support plate, and bolts are fixedly mounted between the upper plate and the lower plate.

[0012] By adopting the above technical solution, the combined support plate and the bottom support plate are fixed together by the upper plate, the lower plate and the bolts.

[0013] Preferably, the adjustment assembly comprises an intermediate cylinder, both ends of the intermediate cylinder are screwed with second screw rods, the outer side of the second screw rod is rotatably connected with a connecting block, and the connecting block is fixedly installed on the inner side of the corresponding combined support plate.

[0014] By adopting the above technical solution, the position of the combined support plates on both sides is adjusted by adjusting the position of the second screw.

[0015] Preferably, a communicating groove is provided inside the connecting block, and a second knob is fixedly mounted on the outer side of the second screw rod.

[0016] By adopting the above technical solution, the routing of the optical fiber sensor will not be affected by the connecting groove.

[0017] Beneficial Effects

[0018] The utility model provides a tunnel wall crack detection device based on a distributed optical fiber sensing system. Compared with the prior art, it has the following beneficial effects:

[0019] 1. The tunnel wall crack detection device based on the distributed optical fiber sensing system drives the clamping plate to move synchronously in the opposite direction through the moving plate. The optical fiber sensor can be fixed by clamping the clamping plates on both sides of the optical fiber sensor. The optical fiber sensor is fixed to the inner wall of the tunnel through the inner pair of clamping plates. During maintenance, the clamping plate can be released by turning the first knob, that is, the optical fiber sensor can be removed, thereby achieving the purpose of convenient maintenance and replacement of the optical fiber sensor.

[0020] 2. The tunnel wall crack detection device based on the distributed optical fiber sensing system drives the second screw to rotate by turning the second knob. The rotation of the second screw can change the position of the second screw and the intermediate cylinder. The second screw moves outward to apply an extrusion force to the outside. The extrusion force acts on the combined support plate to improve the overall stability. The stability of the overall position in the tunnel can be greatly improved by cooperating with the larger bottom plate below, thereby ensuring the stability of the optical fiber sensor after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation scheme of the utility model or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0023] Figure 2 It is a three-dimensional diagram of the internal overall structure of the utility model;

[0024] Figure 3 It is an enlarged view of part of the structure of the utility model;

[0025] Figure 4 It is an enlarged view of the fixing component of the utility model.

[0026] In the figure: 1. bottom plate; 2. fixing assembly; 21. movable plate; 22. clamping plate; 23. first screw rod; 24. side plate; 25. first knob; 3. adjusting assembly; 31. intermediate cylinder; 32. second screw rod; 33. second knob; 34. connecting block; 35. connecting groove; 4. combined assembly; 41. upper plate; 42. lower plate; 43. bolt; 5. bottom support plate; 6. combined support plate; 7. arc plate. DETAILED DESCRIPTION

[0027] It should be noted that in the description of the embodiments of the present application, the terms "front, rear", "left, right", "up, down", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] The present application is further described in detail below through drawings and examples.

[0029] Reference Figures 1 to 4 The embodiment of the present application provides a tunnel wall crack detection device based on a distributed optical fiber sensing system, including a bottom plate 1, a bottom support plate 5 is fixedly installed on the top of the bottom plate 1, a combination component 4 is arranged on the top of the bottom support plate 5, a combination support plate 6 is fixedly installed on the top of the combination component 4, an arc plate 7 is fixedly installed on the top of the combination support plate 6, a fixing component 2 is arranged on the inner sides of the bottom support plate 5, the combination support plate 6 and the arc plate 7, an adjustment component 3 is arranged between the two combination support plates 6, the fixing component 2 includes a side plate 24, the side plate 24 is fixedly installed on the inner side of the bottom support plate 5, a first screw 23 is rotatably connected between the two side plates 24, two movable plates 21 are screwed to the outer side of the first screw 23, a clamping plate 22 is fixedly installed on the inner end of the movable plate 21, and the outer side of the movable plate 21 is in contact with the inner wall of the bottom support plate 5.

[0030] The threads on both sides of the center of the first screw rod 23 have different rotation directions, and the two movable plates 21 are respectively screwed on the outsides of the two threads with different rotation directions on the outside of the first screw rod 23. The clamping plate 22 is an arc plate, and the two opposite clamping plates 22 are symmetrical to each other and have opposite recessed positions. The outside of the side plate 24 is rotatably connected to the first knob 25, and a rotating shaft is fixedly installed between the first knob 25 and the corresponding first screw rod 23, and the rotating shaft is rotatably connected to the inside of the side plate 24.

[0031] In this embodiment, when fixing the optical fiber sensor, the optical fiber sensor is passed through the corresponding clamping plates 22 one by one. When passing through the corresponding clamping plates 22, the first screw 23 is driven to rotate by rotating the first knob 25. The rotation of the first screw 23 drives the movable plate 21 to move synchronously in the opposite direction. The movable plate 21 drives the clamping plates 22 to move synchronously in the opposite direction. The optical fiber sensor can be fixed by clamping the clamping plates 22 on both sides on both sides of the optical fiber sensor. The optical fiber sensor is fixed to the inner wall of the tunnel by the inner pair of clamping plates 22. During maintenance, the clamping plates 22 can be released by simply turning the first knob 25, that is, the optical fiber sensor can be removed, thereby achieving the purpose of convenient maintenance and replacement of the optical fiber sensor.

[0032] Reference Figures 1 to 4 In one aspect of the present embodiment, the combination assembly 4 includes an upper plate 41 and a lower plate 42, the upper plate 41 is fixedly mounted on the bottom of the combination support plate 6, the lower plate 42 is fixedly mounted on the top of the bottom support plate 5, and bolts 43 are fixedly mounted between the upper plate 41 and the lower plate 42.

[0033] The adjustment assembly 3 includes an intermediate cylinder 31, and the two ends of the intermediate cylinder 31 are both screwed with a second screw rod 32, and the outer side of the second screw rod 32 is rotatably connected with a connecting block 34, and the connecting block 34 is fixedly installed on the inner side of the corresponding combined support plate 6. A connecting groove 35 is opened inside the connecting block 34, and a second knob 33 is fixedly installed on the outer side of the second screw rod 32.

[0034] In this embodiment, before the optical fiber sensor is installed, the upper plate 41 and the lower plate 42 are combined by bolts 43, so that the bottom support plate 5 and the combined support plate 6 can be combined together. The overall split design can facilitate transportation before assembly. After assembly, the bottom support plate 5, the combined support plate 6 and the arc plate 7 are attached to the inner wall of the tunnel. After attachment, the second knob 33 is turned to drive the second screw 32 to rotate. The rotation of the second screw 32 can change the position of the second screw 32 and the intermediate cylinder 31. The second screw 32 can move outward to apply an extrusion force to the outside. The extrusion force acts on the combined support plate 6, which can improve the overall stability. In combination with the larger bottom plate 1 below, the stability of the overall position in the tunnel can be greatly improved, thereby ensuring the stability of the optical fiber sensor after installation.

[0035] Working principle: Before installing the optical fiber sensor, the upper plate 41 and the lower plate 42 are combined by bolts 43, so that the bottom support plate 5 and the combined support plate 6 can be combined together. The overall split design can facilitate transportation before assembly. After assembly, the bottom support plate 5, the combined support plate 6 and the arc plate 7 are attached to the inner wall of the tunnel. After attachment, the second knob 33 is turned to drive the second screw 32 to rotate. The rotation of the second screw 32 can change the position of the second screw 32 and the intermediate cylinder 31. The second screw 32 can be moved outward to apply an extrusion force to the outside. The extrusion force acts on the combined support plate 6 to improve the overall stability, and the stability of the overall position in the tunnel can be greatly improved in combination with the larger bottom plate 1 below. The stability of the optical fiber sensor after installation is ensured. When fixing the optical fiber sensor, the optical fiber sensors are passed through the corresponding clamping plates 22 one by one. When passing through the corresponding clamping plates 22, the first screw 23 is driven to rotate by turning the first knob 25. The rotation of the first screw 23 drives the movable plate 21 to move synchronously in the opposite direction. The clamping plates 22 are driven to move synchronously in the opposite direction by the movable plate 21. The optical fiber sensor can be fixed by clamping the clamping plates 22 on both sides of the optical fiber sensor. The optical fiber sensor is fixed to the inner wall of the tunnel by the inner pair of clamping plates 22. During maintenance, the clamping plates 22 can be released by twisting the first knob 25, that is, the optical fiber sensor can be removed, thereby achieving the purpose of convenient maintenance and replacement of the optical fiber sensor.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tunnel wall crack detection device based on a distributed optical fiber sensing system, comprising a bottom plate (1), characterized in that: A bottom support plate (5) is fixedly mounted on the top of the bottom plate (1), a combination assembly (4) is arranged on the top of the bottom support plate (5), a combination support plate (6) is fixedly mounted on the top of the combination assembly (4), an arc-shaped plate (7) is fixedly mounted on the top of the combination support plate (6), a fixing assembly (2) is arranged on the inner sides of the bottom support plate (5), the combination support plate (6) and the arc-shaped plate (7), an adjustment assembly (3) is arranged between the two combination support plates (6), the fixing assembly (2) comprises a side plate (24), the side plate (24) is fixedly mounted on the inner side of the bottom support plate (5), a first screw rod (23) is rotatably connected between the two side plates (24), two movable plates (21) are screwed to the outer side of the first screw rod (23), a clamping plate (22) is fixedly mounted on the inner side end of the movable plate (21), and the outer side of the movable plate (21) is in contact with the inner wall of the bottom support plate (5).

2. A tunnel wall crack detection device based on a distributed optical fiber sensing system according to claim 1, characterized in that: The threads on both sides of the center of the first screw rod (23) have different rotation directions, and the two movable plates (21) are respectively screwed to the outsides of two threads with different rotation directions on the outside of the first screw rod (23).

3. A tunnel wall crack detection device based on a distributed optical fiber sensing system according to claim 2, characterized in that: The clamping plate (22) is an arc plate, and the two opposite clamping plates (22) are symmetrical to each other and have opposite recessed positions. The outer side of the side plate (24) is rotatably connected to a first knob (25), and a rotating shaft is fixedly installed between the first knob (25) and the corresponding first screw rod (23), and the rotating shaft is rotatably connected to the inside of the side plate (24).

4. The tunnel wall crack detection device based on a distributed optical fiber sensing system according to claim 1, characterized in that: The combined assembly (4) comprises an upper plate (41) and a lower plate (42), wherein the upper plate (41) is fixedly mounted on the bottom of the combined support plate (6), and the lower plate (42) is fixedly mounted on the top of the bottom support plate (5), and bolts (43) are fixedly mounted between the upper plate (41) and the lower plate (42).

5. The tunnel wall crack detection device based on a distributed optical fiber sensing system according to claim 1, characterized in that: The adjustment assembly (3) comprises an intermediate cylinder (31), both ends of which are screwed with second screw rods (32), the outer side of the second screw rod (32) is rotatably connected with a connecting block (34), and the connecting block (34) is fixedly mounted on the inner side of the corresponding combined support plate (6).

6. The tunnel wall crack detection device based on a distributed optical fiber sensing system according to claim 5, characterized in that: A communicating groove (35) is provided inside the connecting block (34), and a second knob (33) is fixedly mounted on the outer side of the second screw rod (32).

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