A feature extraction technique based on principal component analysis for pulsed Eddy current NDT

Pulsed Eddy current (PEC) is a new emerging NDT technique for sub-surface defect detection. The technique mainly uses the response peak value and arrival to detect and quantify the defects. This could suffer from noise and be not sufficient to extract more information about the defects, e.g. depth i...

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Bibliographic Details
Published in:NDT & E international : independent nondestructive testing and evaluation 2003, Vol.36 (1), p.37-41
Main Authors: Sophian, Ali, Tian, Gui Yun, Taylor, David, Rudlin, John
Format: Article
Language:English
Subjects:
Analysing. Testing. Standards
Applied sciences
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Feature extraction
Materials science
Materials testing
Measurement of properties and materials state
Metals. Metallurgy
Nondestructive testing
Nondestructive testing: electromagnetic testing, eddy-current testing
Physics
Principal component analysis (PCA)
Pulsed Eddy current sensor
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Summary:Pulsed Eddy current (PEC) is a new emerging NDT technique for sub-surface defect detection. The technique mainly uses the response peak value and arrival to detect and quantify the defects. This could suffer from noise and be not sufficient to extract more information about the defects, e.g. depth information of defects. This paper introduces the application of principal component analysis in extracting information from PEC responses. A comparative test carried out shows that the introduced technique has performed better than the conventional technique in the classification of defects.
ISSN:0963-8695
1879-1174
DOI:10.1016/S0963-8695(02)00069-5