Tunnel volume element deformation movable monitoring system and method

A mobile monitoring and mobile carrier technology, applied in measurement devices, surveying, mapping and navigation, instruments, etc., can solve the problems of unsuitable large-scale, automated, high-frequency overall monitoring of tunnels, and the results cannot be real-time dynamic, so as to avoid contradictions, The effect of improving the working environment

Inactive Publication Date: 2009-04-15
SHANDONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these subway tunnel monitoring methods have the characteristics of point deformation or discontinuous surface deformation monitoring, and the results cannot reflect the overall (or large-scale) deformation in real time, dynamically, and effectively. Therefore, these methods are more suitable for construction sites or easy to predict It is not suitable for large-scale, automatic and high-frequency overall monitoring of tunnels such as subways

Method used

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  • Tunnel volume element deformation movable monitoring system and method
  • Tunnel volume element deformation movable monitoring system and method

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0060] SICK291 two-dimensional laser scanner is adopted, and its main indicators are: measuring range 8m, ranging accuracy 1mm, scanning opening angle 180°, line frequency 5Hz, 361 points per line. A self-made odometer is used with a sensitivity of 0.1mm. The simulation test selects a 30-meter underground tunnel as the test site.

[0061] Fix the SICK291 two-dimensional laser scanner on the mine car, and push the mine car manually. With the operation of the mine car, the scanner scans the roadway surface; the scanner is connected to the computer, and the computer receives the data in real time. The position of the scanner is obtained by the odometer synchronized with the wheels of the mine cart. After the initial position is determined, the odometer can record the real-time position of the scanner.

[0062] Through preliminary research, the following preliminary conclusions are obtained:

[0063] Perform 100 repeated scans of the proving ground. Due to operation and other r...

experiment example 2

[0065] A 180° SICK scanner is used, the model is LMS200, the line sampling rate reaches 76 lines / s, the sampling accuracy can reach 1mm, and the minimum resolvable deformation is 3mm, so the expected index can be achieved. Utilize the existing geographic coordinate system and track information of the subway, and at the same time regard the tunnel as the topological invariant of the spatial shape to perform certain transformations.

[0066] Use the subway locomotive as the mobile carrier, scan dozens of times a day, and use the daily scan data for surface modeling to form a body; the next day (or every few days) carry out spatial registration of the two models to monitor the body deformation of the measured object quantity. Dozens of scan data are used for surface modeling, which not only increases the point cloud density, but also improves the model accuracy. In particular, the accuracy of voxel deformation analysis is much higher than that of single point monitoring.

[006...

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Abstract

The invention discloses a tunnel body form deformation mobile monitoring system and a monitoring method thereof. The hardware comprises a laser scanner, a CCD camera, a speed meter, an inertial navigator, a central control unit and bar codes. The central operation control unit leads the hardware of each sensor to be synchronous, stores the data of each sensor and carries out the corresponding position and stature calculation so as to process the obtained point cloud data of the tunnel sections; the bar codes are distributed at the positions on the tunnel surface where the CCD camera can shoot and the storage position information of the bar codes is adopted as the position reference of moving carriers and sensors. The hardware of the tunnel body form deformation mobile monitoring system provided by the invention is helpful for quickly and dynamically collecting space data and for further carrying out the body form deformation analysis through three dimensional modeling and reconstruction of models so as to monitor the deformation process continuously.

Description

technical field [0001] The invention relates to a tunnel deformation and movement monitoring system for subways and the like, in particular to a tunnel voxel deformation and movement monitoring system that can be loaded on a moving carrier in the tunnel. Background technique [0002] After the subway tunnel is completed, especially after long-term operation, it will be deformed by the surrounding environment such as ground pressure and its own strain. Larger deformation indicates the occurrence of engineering disasters. From the perspective of deformation, the occurrence of engineering disasters is a process from quantitative change to qualitative change. One of the main means of prevention is to monitor the deformation of subway tunnels. [0003] At present, the common deformation monitoring methods of subway tunnels at home and abroad are as follows: [0004] The automatic total station monitoring method, the system is composed of a total station and a remote control te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16G01C7/06
Inventor 卢秀山郑作亚许君一石波王冬柳林宋锐刘凤英独知行韩晓冬
Owner SHANDONG UNIV OF SCI & TECH
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