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A method and device for measuring the wear of catenary wires based on machine vision

A technology of machine vision and measurement methods, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of rigid suspension busbars such as inelasticity, large impulse, and large degree of wear of contact wires, so that the wear situation is easier to monitor intuitively, Overcome all kinds of interference and facilitate timely feedback on the effect of maintenance and replacement

Active Publication Date: 2020-02-04
CHENGDU TANGYUAN ELECTRICAL APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rigid suspension busbar has no elasticity and is used to counteract the lifting force of the pantograph. It suddenly appears with the lifting force of the pantograph on the contact suspension, so that the impulse of the pantograph lifting force to the contact suspension is relatively large. Thus the wear of the contact wire is greater

Method used

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  • A method and device for measuring the wear of catenary wires based on machine vision
  • A method and device for measuring the wear of catenary wires based on machine vision
  • A method and device for measuring the wear of catenary wires based on machine vision

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Experimental program
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Effect test

Embodiment 1

[0051] Step 1: Single-channel camera captures the catenary image including the bottom of the catenary rigid conductor;

[0052] Step 2: Segment the maximum connected area of ​​catenary wires including L1, L2 and L3, boundary position E1 and boundary position E2 from the above-mentioned catenary image;

[0053] Step 2. The specific process of segmenting the maximum connected area, boundary position E1 and boundary position E2 of the wire is: according to the general gray distribution characteristics of catenary wire imaging, by setting the empirical threshold, the maximum connected area of ​​the wire including L1, L2 and L3 Distinguished from the background area, the maximum connected area of ​​the wire including L1, L2 and L3 is obtained.

[0054] Step 3: Thresholding the maximum connected area of ​​the catenary wire to obtain the thresholded image T(x, y). According to the characteristics of the connected area of ​​the catenary wire, combined with the boundary position E1 and...

Embodiment 2

[0066] Embodiment 2: On the basis of Embodiment 1, when the L2 width information cannot be identified through one image acquisition camera, and the wire wear value d cannot be calculated, it is necessary to further determine whether the single image is due to the L1 and L2 in the image. The L3 wire is discontinuous; the specific steps are:

[0067] Step 5: When the wire wear value d cannot be calculated, it also includes:

[0068] Step 51: Refine the central positions of L1, L2 and L3; that is, on the basis of the calculated L1, L2 and L3 and the bus boundary E1 and E2, use the binary image refinement algorithm to determine the maximum connectivity of L1, L2 and L3 The area is refined, and the three centerlines corresponding to L1, L2 and L3 can be obtained;

[0069] Step 52: On the basis of the maximum connected domain of the wires, the center positions of L1, L2, and L3 are combined with the left and right borders E1, E2 of the wires to identify the discontinuity of the wir...

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Abstract

The invention relates to the field of contact network rigid-lead-wire measurement subway systems in urban rail transit, and provides a machine vision-based contact network lead-wire wear measurement method and device for the problems existing in the prior art. Wear measurement is realized through using basic methods of image processing and machine vision. In a captured image containing lead wires,L1, L2 and L3 are segmented from a rest background in the image through image processing threshold processing and communicated-region characteristic analysis, lead-wire boundary locations E1 and E2 are utilized to determine a lead wire L2, and a wear value d can be obtained simply by measuring L2 width. Further, if only a partial region of the lead wire is discontinuous in the image due to complicated subway lines, and a wear value d of each position of the lead wire L2 cannot be accurately calculated, lead wire tracking, image refinement and the like are used to obtain an exact position of the lead wire, and thus the lead wire wear value d is calculated and measured.

Description

technical field [0001] The invention relates to the field of measuring the rigid conductors of catenary systems in urban rail transit, in particular to a method and device for measuring the wear of catenary conductors based on machine vision. Background technique [0002] In the electrified railway, the train runs through the mutual contact and sliding of the pantograph slide plate and the catenary wire to obtain current. In order to ensure good current reception by the pantograph, it is necessary to have a certain contact pressure between the pantograph slide plate and the contact wire. However, with the vibration brought by the train running and the long-term contact between the pantograph slide plate and the catenary wire, the catenary wire will be worn to different degrees and at different angles. [0003] It can be seen from the knowledge of physics that the wear of the catenary wire is mainly related to the pantograph-catenary pressure, the characteristics of the pant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00
CPCG01B11/00G06T7/11G06T7/136G06T2207/10004
Inventor 李想彭博曹伟王瑞锋
Owner CHENGDU TANGYUAN ELECTRICAL APPLIANCE
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