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On-linesurface defect detection for steel rails based on multi-line lasers

Authors :
ZHOU Peng
XU Ke
ZHANG Chun-yang
YANG Chao-lin
Source :
工程科学学报, Vol 37, Iss S1, Pp 18-23 (2021)
Publication Year :
2021
Publisher :
Science Press, 2021.

Abstract

Multi-line lasers were applied to the on-line defect detection for steel rails instead of single-line laser,which solved the problem of "pseudo defects" due to the vibration of rails under the mode of single-line laser. Images of multi-line lasers captured by camera were processed to realize the online detection and the accurate defect feature area was acquired with steps of the extraction of strip centers,detection of difference algorithm,discrimination between real and pseudo defects,image mosaic,etc. Images of the defect area were extracted by the cross-correlation and self-correlation information of laser curves,and there was no need for the step of depth mapping under the single-line mode,so the problem of "fault detection" caused by the vibration of rails was solved fundamentally. The technique is applied to on-line detection of defects for the bottom side of steel rails,and the detection rate is much higher than manual detection.

Details

Language :
Chinese
ISSN :
20959389
Volume :
37
Issue :
S1
Database :
Directory of Open Access Journals
Journal :
工程科学学报
Publication Type :
Academic Journal
Accession number :
edsdoj.852edf6671a04f37913a05f10ffcaaa3
Document Type :
article
Full Text :
https://doi.org/10.13374/j.issn2095-9389.2015.s1.004