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Subway train wheel-rail force monitoring method based on computer vision

A computer vision, train wheel technology, applied in the direction of railway vehicle shape measuring instrument, calculation, railway car body parts, etc., to achieve the effect of reducing instrument cost, reducing manpower, and ensuring safety

Pending Publication Date: 2022-04-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of computer vision technology to the measurement of the wheel-rail force of subway trains not only puts higher requirements on the image acquisition frequency and resolution of the camera, but also poses challenges to the stability and accuracy of the monitoring method.

Method used

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  • Subway train wheel-rail force monitoring method based on computer vision
  • Subway train wheel-rail force monitoring method based on computer vision
  • Subway train wheel-rail force monitoring method based on computer vision

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Embodiment Construction

[0044] The following combination figure 1 The device schematic diagram of the shown inventive method and figure 2 The schematic diagram of rail stress further illustrates the specific implementation of the present invention. The specific steps are as follows:

[0045] A. Install monitoring equipment ；

[0046] A1. Select the subway track 2 between two adjacent fasteners 1 as the monitoring target, fix the high-precision industrial camera 3 on the surface of the ballast bed 4 or the wall of the segment near the monitoring target, and align the camera 5 with the monitoring track 2;

[0047] A2. Investigate the on-site lighting conditions, turn on the supplementary light 6 with its own power supply for lighting, so that there is a clear contrast between the edge of the rail 2 and the background;

[0048] A3. Adjust the position of the camera head 5 to ensure that it can obtain real-time monitoring images of the monitoring target.

[0049] B. Debugging and monitoring equipme...

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Abstract

The invention discloses a subway train wheel-rail force monitoring method based on computer vision, and the method comprises the steps: selecting a section of subway rail between two adjacent sleepers as a monitoring target, obtaining a rail image through an industrial camera when a subway train passes through, and analyzing the image through a computer vision method to obtain the vertical displacement of the rail. When wheels press the steel rails, the steel rails form a simply supported beam structure through the support of the two sleepers, and the load, namely the wheel-rail force, acting on the track structure is obtained through the relationship between the load and displacement in elastic mechanics. The method has the main advantages that (1) the method is a lossless wheel-rail force measurement method, and normal operation of a track or a subway is not affected in the monitoring process; and (2) the method is a non-contact monitoring method, the problem that a sensor is difficult to install due to narrow space below the steel rail is solved, the monitoring accuracy is slightly influenced by environmental factors, and long-term continuous displacement monitoring can be realized.

Description

technical field [0001] The invention relates to a method for monitoring the wheel-rail force of a subway train based on computer vision, which is used for measuring the wheel-rail force of the subway train. Background technique [0002] In soft soil areas, long-term settlement of subway shield tunnels will occur due to various reasons during the operation period, which will affect the tunnel structure and operational safety. The main reasons for the long-term settlement of the subway tunnel are the load of the subway train, the ground conditions, the water leakage of the tunnel structure, and the influence of other surrounding engineering constructions, etc., and the load of the subway train is considered to be one of the most important factors. The cyclic dynamic load caused by the operation of the subway train produces a dynamic response in the tunnel structure and soil, resulting in long-term cumulative deformation of the soil, which has an adverse effect on the safety an...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/62B61K9/08
Inventor 叶肖伟张鸿乾李哲勋
Owner ZHEJIANG UNIV
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