Vehicle-mounted measurement device of three-dimensional deformation monitoring of subway tunnels based on reference transmission

Abstract

The invention belongs to the technical field of three-dimensional detection of subway tunnels, and discloses a vehicle-mounted measurement device of three-dimensional deformation monitoring of subwaytunnels based on reference transmission. A rotatable laser distance measurement system for high-speed distance measurement and angle measurement is integrated by a laser range finder, an inclination angle sensor, a high-precision turn table and a PLC controller together; a tunnel section outline is measured in a discrete multi-point mode; meanwhile, in combination with a photoelectric encoder installed on a distance measurement wheel at the bottom of a tunnel detection vehicle, a fixed displacement amount of the detection vehicle between a starting position and a travelling position on an axial direction of the tunnel is obtained, a program is triggered, and the detected data of the specific position in the tunnel are transmitted to an upper computer by a wireless communicator. The vehicle-mounted measurement device disclosed by the invention makes breakthroughs in the practical technical innovation of the online monitoring of the tunnel structure safety, lays a foundation for forminga technical system for the reliability design, analysis, test and evaluation of rail transit facilities, and has practicality in many fields.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional detection of subway tunnels, in particular to a vehicle-mounted measurement device for three-dimensional deformation monitoring of subway tunnels based on reference transmission. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] As a new high-tech technology, deformation monitoring has different measurement methods. Photogrammetry technology is mainly aimed at large-area deformation monitoring, such as large-scale special measurements of tunnel construction planes. Using digital close-range photogrammetry technology and laser scanning form to conduct precise anatomical measurement and intelligent technical analysis on the tunnel ground, and comprehensively count the deformation of the ground during tunnel construction. [0004] The tunnel convergence monitoring method is suitable for the monitoring and measurement...

AI Technical Summary

Problems solved by technology

[0015] 1) Low monitoring efficiency: For the detection of tunnel longitudinal settlement, lateral displacement and section convergence deformation, traditional monitoring is mostly carried out by manual periodic monitoring. Due to its long observation time, limited observation period and frequency, it is not suitable for tunnel operation state use

[0016] At the same time, with the improvement of analysis requirements, the tunnel health monitoring system during the operation period needs to have long-term online, real-time automatic monitoring and other functions. Can't meet engineering needs

[0017] 2) High monitoring cost: Traditional subway tunnel monitoring requires professional tunnel or subway operators to go to each monitoring point during the non-operating period of the subway vehicle, set up testing equipment, and inspect each point on each tunnel section according to standard testing procedures. Carry out measurement, record the distance z of the tunnel section from the starting point, and the distance and angle of each point on the tunnel section from the center of the rail (or the position of the distance meter), and then convert this information into absolute three-digit data describing the entire subway space (x,y,z)

In general, it will lead to high monitoring costs

[0018] 3) Poor monitoring accuracy: Most of the methods and instruments used in the early subway tunnel monitoring were classic ground measurement methods and traditional instruments such as levels and theodolites

Some monitoring technologies need to install sensor arrays on the tunnel section, which will cause certain damage to the tunnel, and the long-term reliability of the sensor installation structure will also affect the monitoring accuracy

[0019] 4) Low degree of information integration: The trend of subway tunnel monitoring should be towards automation, informatization and intelligence

[0021] The difficulties in solving the above technical problems are as follows: With the development of technology, some of them have received research attention from the academic and engineering circles, some have been solved, and some targeted solutions have been proposed. However, due to the complexity and particularity of the three-dimensional deformation monitoring of subway tunnels , the problem is still not systematically resolved

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