A new approach for restoration of eddy current images

被引：10
|
作者：
Rao, BPC [1 ]
Raj, B
Jayakumar, T
Kalyanasundaram, P
Arnold, W
机构：
[1] Indira Gandhi Ctr Atom Res, Met & Mat Grp, Kalpakkam 603102, Tamil Nadu, India
[2] NDT, Fraunhofer Inst, D-66123 Saarbrucken, Germany
来源：
JOURNAL OF NONDESTRUCTIVE EVALUATION | 2001年 / 20卷 / 02期
关键词：
eddy current testing; stainless steels; image processing and neural networks;
D O I：
10.1023/A:1012292124404
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Eddy current images of defects are blurred due to convolution of point spread function of eddy current probe with defects. Disturbing variables such as lift-off, surface roughness, and material property variations influence the eddy current images. In order to restore the length, width, depth, and orientation of surface-breaking defects in the presence of disturbing variables, a new and comprehensive approach has been developed. This approach uses artificial neural network and image processing methods. Studies on austenitic steel plates confirm that through this approach it is possible to restore the spatial information of surface-breaking defects of uniform or slowly varying depth and also to form their accurate three-dimensional pictures. This approach is fast as well as amenable for automation.
引用
收藏
页码：61 / 72
页数：12
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