Vision system using linear CCD cameras in fluorescent magnetic particle inspection of axles of railway wheelsets

被引：8
|
作者：
Hao, HW [1 ]
Li, LM [1 ]
Deng, YH [1 ]
机构：
[1] Tsing Hua Univ, Tsinghua Space Ctr, Beijing 100084, Peoples R China
来源：
Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems IV | 2005年 / 5768卷
关键词：
fluorescent magnetic particle; axle of railway wheelset; linear CCD; image processing; crack identification;
D O I：
10.1117/12.600519
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Automatic magnetic particle inspection based vision system using CCD camera is a new development of magnetic particle inspection. A vision system using linear CCD cameras in semiautomatic fluorescent magnetic particle inspection of axles of railway wheelsets is presented in this paper. The system includes four linear CCD cameras, a PCI data acquisition & logic control card, and an industrial computer. The unique characteristic of striation induced by UV light flicker in scanning image acquired by linear CCD camera are investigated, and some digital image processing methods for images of magnetic particle indications are designed to identify the cracks, including image pre-processing using wavelet, edge detection based connected region using Candy operator and double thresholds. The experimental results show that the system can detect the article cracks effectively, and may improve inspection quality highly and increase productivity practically.
引用
收藏
页码：442 / 449
页数：8
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