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Vehicle contour detection system and method for rail transit

A contour detection and rail transit technology, which is applied in the field of rail transit vehicle contour detection system, can solve problems such as strong detection coverage, unsatisfactory requirements, and unsatisfactory detection accuracy, and achieve strong anti-interference ability, high detection accuracy and The effect of repeatability

Pending Publication Date: 2022-05-13
BEIJING AEROSPACE MEASUREMENT & CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the algorithm of this technology is relatively mature, its biggest disadvantage is that it is greatly affected by the environment, and problems such as image processing grayscale distortion, geometric distortion, noise interference, and special structures (flat areas, repeated similar structures) will introduce large problems. Detection error, detection accuracy often cannot meet the requirements of actual use
[0004] To sum up, the current existing technologies mainly include contact measurement and non-contact measurement. The existing problems include detection accuracy that cannot meet the demand, detection efficiency is low, the scope of application of the detection method is too limited, and the detection coverage cannot meet the demand. Wait

Method used

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  • Vehicle contour detection system and method for rail transit
  • Vehicle contour detection system and method for rail transit
  • Vehicle contour detection system and method for rail transit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] In this embodiment, the laser 3D industrial camera is used as the optical measuring instrument to realize the detection of the vehicle to be tested. The deployment of the laser 3D industrial camera is as follows: Figure 4 shown.

[0080] The working process of the existing laser 3D industrial camera is as follows: a line laser transmitter emits a line laser to form a laser contour line on the vehicle, the industrial camera records the laser contour line, and then obtains the spatial information of the contour through three-dimensional mapping. Through the calibration of the distortion coefficient and the internal parameters of the rotation matrix of the laser 3D industrial camera, the conversion mapping of pixel coordinates, image coordinates, camera coordinates and the world coordinate system is completed.

[0081] For each section of the vehicle to be inspected, multiple integrated laser 3D industrial cameras are used to obtain its contour lines. The laser emits lin...

Embodiment 2

[0088] In this example, a large-size three-dimensional scanner is used as an optical measuring instrument, and a vehicle contour detection device and system for rail transit provided by the present invention is used to complete the detection of the vehicle to be measured. The process is as follows: Figure 5 The specific process is as follows:

[0089] Each large-scale 3D scanner has its own coordinate system, and two adjacent large-scale 3D scanners identify the common target, extract the same feature points, and use it as the registration basis for splicing. The center line of the track can be selected as a point. The origin of the world coordinates, establishes the corresponding relationship f(x) between each large-scale 3D scanner coordinate system and the world coordinate system, and completes the conversion of each large-scale 3D scanner 3D point cloud to the world coordinate system. In addition, in order to further save the detection time, after the coordinate transform...

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Abstract

The invention discloses a vehicle contour detection system and method for rail transit, and the method comprises the steps: deploying a high-precision laser range finder, and mounting an optical measuring instrument on a portal frame; and the high-precision laser range finder is matched with the optical measuring instrument, so that real-time detection and abnormal contour positioning of the contour of the vehicle to be detected can be realized.

Description

technical field [0001] The invention belongs to the technical field of contour detection of rail transit vehicles such as high-speed rail, urban rail and electric locomotive, and particularly relates to a vehicle contour detection system and method for rail transit. Background technique [0002] At present, with the rapid development of national rail transit, the safety requirements for high-speed rail, urban rail and electric locomotives are becoming more and more strict. , it is not allowed to exceed the outline dimension line. No part of the vehicle shall, under any circumstances, exceed the dimensions specified by the vehicle limits. With the progress of vehicle processing and manufacturing technology, the requirements of vehicle contour processing and manufacturing accuracy are gradually improved, so the detection requirements for vehicle contour are becoming more and more strict. Combined with the analysis of the characteristics of the vehicle, the characteristics of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24G01S17/08
CPCG01B11/24G01S17/08
Inventor 肖江涛白伟光王忆南
Owner BEIJING AEROSPACE MEASUREMENT & CONTROL TECH