Metro tunnel deformation real-time monitoring and early warning system based on laser ranging principle

Abstract

The invention provides a real-time monitoring and early warning system for subway tunnel deformation based on the principle of laser ranging, mainly including a data acquisition system and a data display and processing system. The present invention is different from the traditional laser interferometric distance measuring device. The reflective target on the track subgrade and the surrounding rock of the tunnel can produce displacement changes due to subsidence of the subgrade and deformation of the tunnel structure. The displacement of each data acquisition module is determined by Fourier Ye established a continuous function for overall control, and calculated the displacement of the corresponding reflective target through the relative changes of the two functions, and then judged whether the tunnel is deformed, which can realize 24-hour uninterrupted monitoring of tunnel deformation. The present invention utilizes 6LoWPAN network to transmit the measurement data to the upper computer, which has low cost, low power consumption, low complexity, small and flexible collection nodes and easy networking, avoids various disadvantages of traditional wired cable transmission, and can be used for subway tunnels Real-time and reliable monitoring of deformation.

Description

technical field [0001] The invention relates to the technical field of subway tunnel monitoring, in particular to the technical field of tunnel structure deformation, positioning real-time monitoring and early warning based on the principle of laser ranging. Background technique [0002] With the development of economy, more and more cities begin to build subway projects. The subway tunnel is built in the downtown area with complex geology, narrow roads, dense underground pipelines and heavy traffic, so its safety cannot be ignored. Whether in the construction period or in the operation period, the deformation monitoring of the structure should be carried out to ensure the safety of the main structure and the surrounding environment. The stability of the subway foundation has an important impact on the safety of urban traffic, and the monitoring of the subway foundation can timely detect potential safety hazards that affect the normal operation of the railway. [0003] At ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the unrealizable and continuous tracking and monitoring of the existing system, solve the difficulties of wired monitoring wiring, expensive system, and inconvenient maintenance, this invention starts from the deformation characteristics of the tunnel and uses the principle of interferometric laser ranging to provide a new The tunnel positioning monitoring system, this system can not only measure the settlement of the track subgrade, but also measure the deformation of the surrounding rock of the tunnel

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