Automatic recording instrument for tunnel lining deformation

Abstract

The utility model discloses an automatic recording instrument for tunnel lining deformation, and relates to the technical field of tunnel safety monitoring, the automatic recording instrument for tunnel lining deformation comprises an information processing input terminal, a deformation monitoring assembly and a data monitoring assembly, the deformation monitoring assembly comprises an optical fiber cable, and the optical fiber cable is connected with the information processing input terminal. The optical fiber cable is provided with an optical fiber grating sensor; the data monitoring assembly comprises an optical signal transmitting station, the optical signal transmitting station is provided with an optical signal transmitter, the optical signal transmitting station is provided with a signal receiving station, and the signal receiving station is provided with a signal receiving mechanism. After the optical signal emitted by the optical signal emitter is reflected and received by the fiber grating sensor, the tunnel lining deformation can be monitored according to the change of the reflected optical signal, the data is automatically recorded through the information processing and recording terminal, the anti-interference capability of the optical fiber is strong, and the monitored data is accurate.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel safety monitoring, specifically to an automatic recording instrument for tunnel lining deformation. Background Technology

[0002] Tunnel lining deformation monitoring is a crucial aspect of tunnel engineering safety management and maintenance. During tunnel construction or operation, lining deformation may be related to construction techniques, material quality, or geological conditions. Tunnel lining deformation may be a precursor to structural instability. If it is not detected and addressed in time, it may lead to serious problems such as crack expansion, spalling, or even collapse.

[0003] Existing monitoring equipment mainly collects lining deformation data in real time through wireless sensor nodes or directly uses three-dimensional laser scanning technology. The former is susceptible to interference, which affects the accuracy of the data, while the latter, three-dimensional laser scanning, is highly dependent on light and is generally conducted periodically, resulting in data lag and making real-time monitoring difficult. Utility Model Content

[0004] This invention provides an automatic recording instrument for tunnel lining deformation, which has the advantages of strong anti-interference ability, accurate monitoring data, and continuous monitoring, thus solving the problems of existing monitoring equipment sensors being easily interfered with and low monitoring data accuracy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic recording instrument for tunnel lining deformation, comprising an information processing and input terminal, and further comprising a deformation monitoring component and a data monitoring component, wherein:

[0006] The deformation monitoring component includes multiple optical fibers that are laterally fixed to the inner wall of the tunnel lining by clamps and are arranged at equal intervals. Multiple reflective fiber Bragg grating sensors are installed at equal intervals on the optical fibers.

[0007] The data monitoring component includes optical signal transmitters symmetrically installed on both sides of the bottom of the tunnel. Each optical signal transmitter is equipped with multiple optical signal transmitters at different angles that cooperate with fiber optic grating sensors. A signal receiver is installed at the bottom of the optical signal transmitter, and the signal receiver is equipped with multiple angle-adjustable signal receiving mechanisms.

[0008] Both the signal receiving mechanism and the optical signal transmitter are communicatively connected to the information processing and input terminal.

[0009] As a preferred technical solution of this utility model, the optical fiber cables are symmetrically distributed in an arch shape on the tunnel lining, and the angles of the fiber optic grating sensors on different optical fiber cables are different and correspond to different signal receiving mechanisms at opposite positions.

[0010] As a preferred embodiment of this invention, the spacing between the fiber optic grating sensors on the optical fiber cable is 1.5m-3m.

[0011] As a preferred embodiment of the present invention, the signal receiving mechanism includes a rotating platform rotatably connected to the signal receiving platform, an optical signal receiver is mounted on the upper end of the rotating platform, a rotating shaft is symmetrically mounted on the front end of the rotating platform, and multiple sets of fixed platforms are symmetrically mounted on the upper end of the rotating platform. The rotating shaft is rotatably connected to the fixed platforms through shaft holes.

[0012] As a preferred technical solution of this utility model, a plurality of positioning platforms are symmetrically installed on the upper end of the signal receiving platform. Each positioning platform is provided with an arc-shaped and through rotating groove. Rotating shafts are symmetrically installed at the rear end of the rotating platform. The rotating shafts are movably connected to the rotating grooves. A limit plate is fixed at the end of one rotating shaft after it passes through the rotating groove. An adjustment plate for fixing is detachably installed at the end of the other rotating shaft after it passes through the rotating groove.

[0013] As a preferred embodiment of this utility model, a knob is installed on the outer side of the adjustment disc, the inner wall of the adjustment disc near the rotating shaft is made of friction material and a screw is installed thereon, the rotating shaft near the adjustment disc is provided with a screw hole, and the screw is threadedly connected to the screw hole.

[0014] As a preferred embodiment of this utility model, the information processing and input terminal includes an information processor and a wireless communication module, and the optical signal transmitter and optical signal receiver are both communicatively connected to the information processor.

[0015] Compared with the prior art, this utility model provides an automatic recording instrument for tunnel lining deformation, which has the following beneficial effects:

[0016] This invention utilizes optical fibers arranged in an arched shape laterally on the tunnel lining and multiple fiber optic grating sensors at different angles to monitor the strain of the tunnel lining in real time. When strain occurs, an optical signal is emitted by an optical signal transmitter, reflected by the fiber optic grating sensor, and received. The deformation of the tunnel lining can be monitored based on the change in the reflected optical signal, and the data is automatically entered into the information processing terminal. Moreover, the optical fiber has strong anti-interference capabilities, which can ensure the accuracy of the monitoring data. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the deformation monitoring component of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged view of area A in the middle;

[0020] Figure 4 This is a schematic diagram of the data monitoring component structure of this utility model;

[0021] Figure 5 This is an exploded view of the optical signal receiver of this utility model;

[0022] Figure 6 This is a schematic diagram showing the connection between the adjusting disc and the rotating shaft of this utility model;

[0023] Figure 7 This is a schematic diagram of optical signal transmission and reception of this utility model.

[0024] In the diagram: 1. Information processing and input terminal; 2. Deformation monitoring component; 21. Optical fiber cable; 22. Fiber optic grating sensor; 23. Clamp; 3. Data monitoring component; 31. Optical signal transmitter; 32. Signal receiver; 33. Optical signal transmitter; 4. Signal receiving mechanism; 41. Rotating table; 42. Optical signal receiver; 43. Rotating shaft; 431. Fixed table; 44. Adjusting plate; 441. Screw; 45. Knob; 46. Positioning table; 47. Rotating groove; 48. Rotating shaft; 481. Screw hole; 49. Limiting plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0026] Please see the appendix Figures 1-7 This utility model discloses an automatic recording instrument for tunnel lining deformation, including an information processing and input terminal 1, and also includes a deformation monitoring component 2 and a data monitoring component 3, wherein:

[0027] The deformation monitoring component 2 includes multiple optical fiber cables 21 that are laterally fixed to the inner wall of the tunnel lining by clamps 23 and are arranged at equal intervals. Multiple reflective fiber optic grating sensors 22 are installed at equal intervals on the optical fiber cables 21.

[0028] Data monitoring component 3 includes optical signal transmitters 31 symmetrically installed on both sides of the bottom of the tunnel. The optical signal transmitters 31 are equipped with multiple optical signal transmitters 33 at different angles that cooperate with fiber optic grating sensors 22. A signal receiver 32 is installed at the bottom of the optical signal transmitters 31. The signal receiver 32 is equipped with multiple angle-adjustable signal receiving mechanisms 4.

[0029] Both the signal receiving mechanism 4 and the optical signal transmitter 33 are connected to the information processing and input terminal 1.

[0030] Please refer to the appendix. Figure 1 , Figure 2 The optical fiber cables 21 are symmetrically distributed in an arch shape on the tunnel lining. The angles of the fiber optic grating sensors 22 on different optical fiber cables 21 are different and correspond to different signal receiving mechanisms 4 at opposite positions.

[0031] In this embodiment, when the tunnel lining experiences strain or temperature changes, the reflected light wavelength of the fiber optic grating changes. At this time, the optical signal transmitter 33 transmits the optical signal to the corresponding fiber optic grating sensor 22, and the fiber optic grating sensor 22 reflects the optical signal to the optical signal receiver 42 for real-time monitoring. By monitoring the wavelength offset, the strain or temperature change of the tunnel lining can be accurately measured.

[0032] Furthermore, the spacing between the fiber Bragg grating sensors 22 on the optical fiber cable 21 is 2m, and multiple fiber Bragg grating sensors 22 can be installed on the optical fiber cable 21, enabling large-scale monitoring.

[0033] Furthermore, the information processing and input terminal 1 includes an information processor and a wireless communication module, and the optical signal transmitter 33 and the optical signal receiver 42 are both connected to the information processor.

[0034] In this embodiment, the monitoring data is processed and entered into the information processor on the terminal for analysis and processing, and then recorded in the monitoring system through the wireless communication module. Example 2

[0035] Based on the above embodiment one, please refer to the appendix. Figure 4 , Figure 5 , Figure 6 The signal receiving mechanism 4 includes a rotating platform 41 rotatably connected to the signal receiving platform 32. An optical signal receiver 42 is installed on the upper end of the rotating platform 41. A rotating shaft 43 is symmetrically installed on the front end of the rotating platform 41. Multiple sets of fixed platforms 431 are symmetrically installed on the upper end of the rotating platform 41. The rotating shaft 43 is rotatably connected to the fixed platform 431 through a shaft hole.

[0036] Furthermore, multiple positioning platforms 46 are symmetrically installed on the upper end of the signal receiving station 32. Each positioning platform 46 has an arc-shaped and through-hole rotating groove 47. Rotating shafts 48 are symmetrically installed at the rear end of the rotating platform 41. The rotating shafts 48 are movably connected to the rotating grooves 47. One side of the rotating shaft 48 passes through the rotating grooves 47 and its end is fixed with a limit plate 49. The other side of the rotating shaft 48 passes through the rotating grooves 47 and its end is detachably installed with an adjustment plate 44 for fixing. A knob 45 is installed on the outside of the adjustment plate 44. The inner wall of the adjustment plate 44 near the rotating shaft 48 is made of friction material and is equipped with a screw 441. The rotating shaft 43 near the adjustment plate 44 is provided with a screw hole 481, and the screw 441 is threadedly connected to the screw hole 481.

[0037] In this embodiment, the adjustment plate 44 is loosened by turning the knob 45, and the rear end of the rotating platform 41 is held by hand to start rotating the rotating platform 41 so that the optical signal receiver 42 on the rotating platform 41 is aligned with the reflection direction of the fiber optic grating sensor 22. Then, the screw 441 is screwed into the screw hole 481 so that the inner side of the adjustment plate 44 is attached to the positioning platform 46 for fixation, thereby keeping the angle of the rotating platform 41 fixed, and monitoring can then be performed.

[0038] The working principle and usage process of this utility model are as follows: The optical fiber cable is installed on the inner wall of the tunnel lining by clamp 23. During installation, the angle of the fiber optic grating sensor 22 on the optical fiber cable needs to be rotated and adjusted so that the fiber optic grating sensor 22 is aligned with the emission direction of the corresponding optical signal transmitter 33 on the opposite optical signal transmitter 31. Then, the adjustment plate 44 is loosened by turning knob 45. The rear end of the rotating platform 41 is held by hand and the rotating platform 41 is rotated so that the optical signal receiver 42 on the rotating platform 41 is aligned with the reflection direction of the fiber optic grating sensor 22. Then, the screw 441 is screwed into the screw hole 481 so that the inner side of the adjustment plate 44 is attached to the positioning platform 46 for fixation, thereby keeping the angle of the rotating platform 41 fixed. At this time, monitoring can be performed.

[0039] When the tunnel lining experiences strain or temperature changes, the wavelength of the reflected light from the fiber optic grating changes. At this time, the optical signal transmitter 33 transmits the optical signal to the corresponding fiber optic grating sensor 22, which reflects the optical signal to the optical signal receiver 42 for real-time monitoring. By monitoring the wavelength shift, the strain or temperature change of the tunnel lining can be accurately measured. The monitoring data is processed and entered into the information processor on the terminal for analysis and processing, and then recorded in the monitoring system through the wireless communication module.

Claims

1. A tunnel lining deformation automatic recording apparatus comprising an information processing entry terminal (1), characterized in that, It also includes a deformation monitoring component (2) and a data monitoring component (3), wherein: The deformation monitoring component (2) includes multiple optical fiber cables (21) that are laterally fixed to the inner wall of the tunnel lining by clamps (23) and are arranged at equal intervals. Multiple reflective fiber optic grating sensors (22) are installed at equal intervals on the optical fiber cables (21). The data monitoring component (3) includes optical signal transmitters (31) symmetrically installed on both sides of the bottom of the tunnel. The optical signal transmitters (31) are equipped with multiple optical signal transmitters (33) at different angles and in cooperation with fiber optic grating sensors (22). A signal receiver (32) is installed at the bottom of the optical signal transmitters (31). The signal receiver (32) is equipped with multiple angle-adjustable signal receiving mechanisms (4). The signal receiving mechanism (4) and the optical signal transmitter (33) are both connected to the information processing and input terminal (1).

2. A tunnel lining deformation automatic recording instrument according to claim 1, characterized in that: The optical fiber cables (21) are symmetrically distributed in an arch shape on the tunnel lining. The angles of the fiber grating sensors (22) on different optical fiber cables (21) are different and correspond to different signal receiving mechanisms (4) at opposite positions.

3. A tunnel lining deformation automatic recording instrument according to claim 2, characterized in that: The spacing between the fiber optic grating sensors (22) on the optical fiber cable (21) is 1.5m-3m.

4. The instrument for automatic recording of deformations of tunnel linings according to claim 1, characterized in that: The signal receiving mechanism (4) includes a rotating platform (41) rotatably connected to the signal receiving platform (32). An optical signal receiver (42) is installed on the upper end of the rotating platform (41). A rotating shaft (43) is symmetrically installed on the front end of the rotating platform (41). Multiple sets of fixed platforms (431) are symmetrically installed on the upper end of the rotating platform (41). The rotating shaft (43) is rotatably connected to the fixed platform (431) through a shaft hole.

5. A tunnel lining deformation automatic recording instrument according to claim 4, characterized in that: The signal receiving station (32) is also symmetrically equipped with multiple positioning stations (46). Each positioning station (46) has an arc-shaped and through-hole rotating groove (47). The rotating station (41) is symmetrically equipped with rotating shafts (48) at its rear end. The rotating shafts (48) are movably connected to the rotating grooves (47). One side of the rotating shaft (48) passes through the rotating grooves (47) and the end of the shaft is fixed with a limiting plate (49). The other side of the rotating shaft (48) passes through the rotating grooves (47) and the end of the shaft is detachably equipped with an adjustment plate (44) for fixing.

6. A tunnel lining deformation automatic recording instrument according to claim 5, characterized in that: A knob (45) is installed on the outside of the adjustment disc (44). The inner wall of the adjustment disc (44) near the rotating shaft (48) is made of friction material and is equipped with a screw (441). The rotating shaft (43) near the adjustment disc (44) is provided with a screw hole (481). The screw (441) is threadedly connected to the screw hole (481).

7. The instrument for automatic recording of deformations of tunnel linings according to claim 1, characterized in that: The information processing and input terminal (1) includes an information processor and a wireless communication module. The optical signal transmitter (33) and the optical signal receiver (42) are both connected to the information processor.

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