Tunnel-vault distributed optical fiber monitoring device, construction technology thereof and monitoring method thereof

Abstract

The invention discloses a tunnel-vault distributed optical fiber monitoring device, a construction technology thereof and a monitoring method thereof, belongs to the technical field of sensors, and particularly relates to design of a tunnel-vault distributed optical fiber monitoring device, a construction technology thereof and a monitoring method thereof. The distributed optical fiber monitoring device comprises optical fibers, fiber cloth blocks, an optical time domain reflectometer and polyimide adhesive tape. The optical fibers are pasted to a tunnel vault through the polyimide adhesive tape, and then the fiber cloth blocks are pasted outside the pasted optical fibers and the pasted polyimide adhesive tape through epoxy resin glue; one ends of the optical fibers are connected with the optical time domain reflectometer. The distributed optical fiber monitoring device has the advantages of being novel in structure, convenient to install, low in manufacturing cost, capable of achieving the all-dimensional effect, free of blind areas, capable of achieving total time domain monitoring and the like; the distributed optical fiber monitoring device belongs to a novel tunnel-vault distributed optical fiber monitoring device integrating economical efficiency and practicability.

Description

technical field [0001] The tunnel vault distributed optical fiber monitoring device and its construction technology and monitoring method described in the present invention belong to the field of sensor technology, and in particular relate to the design of a tunnel vault real-time monitoring method based on distributed optical fibers. Background technique [0002] The existing tunnel detection technology mainly adopts Brillouin scattering technology (BOTDR), and its monitoring method focuses on structural displacement, strain and settlement, etc., and has the following limitations: [0003] (1) Multi-point type is easy to miss detection: point-type detection method layout points, the most dangerous place may be missed detection, there are blind spots; increasing the number of monitoring points, although the reliability of the results is improved, but the workload and equipment costs are greatly increased , considering factors such as economy and efficiency, it is difficult t...

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Problems solved by technology

[0003] (1) Multi-point type is easy to miss detection: point-type detection method layout points, the most dangerous place may be missed detection, there are blind spots; increasing the number of monitoring points, although the reliability of the results is improved, but the workload and equipment costs are greatly increased , considering factors such as economy and efficiency, it is difficult to infinitely deploy various detection probes or sensors in actual engineering or research projects;

[0004] (2) High dependence on engineering environment: Traditional technology has slow monitoring speed and low efficiency, and requires specialized operators, while tunnel engineering conditions are often complex, and traditional electrical sensors are sensitive to humidity, temperature, electromagnetic fields and other environmental factors

[0005] (3) The degree of real-time, parallel and automatic monitoring is not high, and there is a lack of long-distance technology and large-area monitoring methods

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