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Subway contact network abrasion measuring method and system based on 3D structured light camera

A measurement method and structured light technology, applied in the direction of measuring devices, optical testing flaws/defects, using optical devices, etc., can solve the problems of discontinuous measured values, high intensity, and low measurement efficiency

Pending Publication Date: 2020-04-10
CHENGDU NAT RAILWAYS ELECTRICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This manual fixed-point measurement method generally has the disadvantages of discontinuous measurement values, low measurement efficiency, and high strength, and is not suitable for the full-line catenary detection. Therefore, a fast, continuous, and full-coverage catenary wear measurement system is urgently needed and methods

Method used

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  • Subway contact network abrasion measuring method and system based on 3D structured light camera
  • Subway contact network abrasion measuring method and system based on 3D structured light camera
  • Subway contact network abrasion measuring method and system based on 3D structured light camera

Examples

Experimental program
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Effect test

Embodiment 1

[0091] refer to figure 1 , a method for measuring the wear of a subway catenary based on a 3D structured light camera, comprising the following steps,

[0092] S1: Scan the bottom contour of the contact line, acquire the contour image of the contact line, and execute S2.

[0093] refer to figure 2 , 3 , in this embodiment, four 3D structured light cameras 1 are installed on the roof of the subway 2 at a certain distance to scan the bottom contour of the contact line. Before scanning, the 3D structured light camera 1 is first calibrated, and a horizontal calibration plane with weak reflection is placed on the laser of the 3D structured light camera 1 for calibration, and then the region of interest, exposure, and point distance are set and calibrated. Send a synchronous trigger signal to the four 3D structured light cameras, so that the four 3D structured light cameras work synchronously. Secondly, through the subway movement, the horizontal coordinates of the four 3D struc...

Embodiment 2

[0135] refer to figure 1 , a method for measuring the wear of a subway catenary based on a 3D structured light camera, comprising the following steps,

[0136] S1: Scan the bottom contour of the contact line, acquire the contour image of the contact line, and execute S2.

[0137] refer to figure 2 , 3 , in this embodiment, four 3D structured light cameras 1 are installed on the roof of the subway 2 at a certain distance to scan the bottom contour of the contact line. Before scanning, the 3D structured light camera 1 is first calibrated, and a horizontal calibration plane with weak reflection is placed on the laser of the 3D structured light camera 1 for calibration, and then the region of interest, exposure, and point distance are set and calibrated. Secondly, through the movement of the subway 2, the horizontal coordinates of the four 3D structured light cameras 1 are translated, and the forced splicing in the X-axis direction is realized, so as to complete the scanning o...

Embodiment 3

[0181] refer to figure 2 , 3 , a metro catenary wear measurement system based on a 3D structured light camera, including

[0182] The image acquisition unit includes a plurality of 3D structured light cameras 1, and the plurality of 3D structured light cameras 1 are located on the same horizontal calibration plane and arranged along the length direction of the contact line, and are used to scan the bottom of the contact line and obtain a profile image of the contact line .

[0183] refer to figure 2 , 3 , in this embodiment, four 3D structured light cameras 1 are installed on the roof of the subway 2 at a certain distance to scan the bottom contour of the contact line. Before scanning, the 3D structured light camera 1 is first calibrated, and a horizontal calibration plane with weak reflection is placed on the laser of the 3D structured light camera 1 for calibration, and then the region of interest, exposure, and point distance are set and calibrated. Send a synchronou...

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Abstract

The invention relates to the technical field of rail construction and aims to provide a subway contact network abrasion measuring method and system based on a 3D structured light camera. The method comprises the following steps: S1, scanning the bottom contour of a contact line, obtaining a contact line contour image and executing S2; S2, de-noising and smoothing the acquired contact line contourimage and executing S3; S3, judging whether a contact line is a rigid line or not according to contact line contour data in the contact line contour image, if so, executing S5, and if not, executing S4; S4, adding a plurality of auxiliary points to two ends of the contact line contour respectively, constructing curvature mutation, and executing S5; S5, screening feature points representing a contour edge of the contact line, and executing S6; and S6, calculating an abrasion angle of the contact line. The method and the system has the advantages that traction power supply safety is ensured, manpower and time cost is saved, and working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of track construction, in particular to a method and system for measuring wear of a subway catenary based on a 3D structured light camera. Background technique [0002] Catenary is one of the important equipment of urban rail transit power supply system, its safety and reliability will be directly related to the operation status of the subway. Catenary personnel found contact lines in some areas during maintenance, such as some large bends, anchor sections Joints, intermediate joints, and reentry line forks have large wear, uneven wear, and even abnormal wear such as side wear. Abnormal wear of the contact wire will affect the normal matching relationship of pantograph and catenary, reduce the quality of pantograph current intake, shorten the service life of the contact wire, and even have certain hidden dangers to the safe operation of the subway. Therefore, it is particularly important to find out the abn...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/13G06T5/00G01B11/24G01N21/88
CPCG06T7/0004G06T7/13G01B11/24G01N21/8851G01N2021/8887G06T5/70
Inventor 范国海吕太洪胡文锐魏筱毛武莹薛晓利
Owner CHENGDU NAT RAILWAYS ELECTRICAL EQUIP
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