基于分布式光纤传感系统的隧道墙壁裂缝快速探测装置
By improving the installation structure and protective measures, the problem of unstable installation of fiber optic sensors in tunnels has been solved, achieving stable installation and dust protection, and ensuring the reliability of information detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
- Filing Date
- 2025-10-10
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the installation of distributed fiber optic sensors between the mounting bracket and the tunnel wall is unstable, the installation method is cumbersome, and it is easy to loosen and shift, which affects the information detection effect.
The structure employs mounting plates, mounting bolts, support ramps, bonding plates, positioning columns, L-shaped limit blocks, and other components. Combined with magnetic blocks and metal movable plates, it achieves stable installation of fiber optic sensors through magnetic adsorption and tight pressure on rubber pads, and utilizes arc-shaped guide plates to protect the sensors.
This improves the installation stability and convenience of fiber optic sensors, prevents loosening and displacement, reduces dust adhesion, and ensures the reliability of information detection.
Smart Images
Figure CN224517814U_ABST
Abstract
Claims
1. A tunnel wall crack rapid detection device based on a distributed optical fiber sensing system, comprising a tunnel wall (1), characterized in that: An installation frame (2) is fixedly installed on the inner wall of the tunnel wall (1). An installation plate (3) is attached to one end of the bottom of the installation frame (2). An installation bolt (4) is symmetrically installed in the middle of the installation plate (3). A support inclined plate (5) is fixedly connected to the bottom of the installation plate (3). A fitting plate (6) is fixedly connected to the bottom of the support inclined plate (5). A positioning column (7) is fixedly installed in the middle of the bottom of the fitting plate (6). A positioning groove (8) is opened at one end of the bottom of the tunnel wall (1) at the position corresponding to the fitting plate (6). L-shaped limiting blocks (9) are symmetrically fixedly connected to both sides of the installation plate (3). Limiting grooves (10) are symmetrically opened on the side walls of the tunnel wall (1) at the positions on both sides of the installation plate (3). The mounting bracket (2) has fixed blocks (11) fixedly installed at equal intervals in the middle. The top of the fixed block (11) has a mounting groove (12) in the middle. The top two ends of the fixed block (11) are symmetrically fixedly installed with guide columns (13). A metal movable plate (14) is movably installed between the tops of the two guide columns (13). A tight-fitting rubber pad (15) is fixedly bonded to the bottom of the metal movable plate (14). A magnetic block (16) is fixedly installed in the middle of one end of the top of the fixed block (11). A distributed fiber optic sensor (17) is placed inside the mounting groove (12).
2. The rapid tunnel wall crack detection device based on the distributed optical fiber sensing system according to claim 1, characterized in that, The mounting bolt (4) passes through the mounting plate (3), and one end of the mounting bolt (4) is inserted into the interior of the tunnel wall (1). The mounting bracket (2) is fixedly connected to the tunnel wall (1) by the mounting bolt (4).
3. The rapid detection device for tunnel wall cracks based on a distributed optical fiber sensing system according to claim 1, characterized in that, The bonding plate (6) is tightly attached to the bottom surface of the tunnel wall (1), the positioning column (7) is movably inserted into the interior of the positioning groove (8), and one end of the L-shaped limiting block (9) is inserted into the interior of the limiting groove (10).
4. The rapid tunnel wall crack detection device based on the distributed optical fiber sensing system according to claim 1, characterized in that, The magnetic block (16) and the metal movable plate (14) are connected by magnetic adsorption, and the tight-fitting rubber pad (15) is attached to the top of the distributed optical fiber sensor (17).
5. The rapid tunnel wall crack detection device based on the distributed optical fiber sensing system according to claim 1, characterized in that, An arc-shaped bottom block (18) is fixedly connected to one end of the bottom of the fixed block (11). An extrusion pad (19) is embedded in the inner side of the arc-shaped bottom block (18), and an arc-shaped guide plate (20) is installed in the middle of the arc-shaped bottom block (18).
6. The rapid tunnel wall crack detection device based on the distributed optical fiber sensing system according to claim 5, characterized in that, The bottom end of the arc-shaped guide plate (20) is inserted into the middle of the arc-shaped bottom block (18), and the surface of the bottom end of the arc-shaped guide plate (20) is in close contact with the inner wall of the extrusion pad (19). The arc-shaped guide plate (20) covers one side of the distributed optical fiber sensor (17).