Frequency feature based quantification of defect depth and thickness
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Shulin Tian1, Kai Chen1, Libing Bai1
1School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China.
The Review of Scientific Instruments
|July 3, 2014
Abstract:
This study develops a frequency feature based pulsed eddy current method. A frequency feature, termed frequency to zero, is proposed for subsurface defects and metal loss quantification in metallic specimens. A curve fitting method is also employed to generate extra frequency components and improve the accuracy of the proposed method. Experimental validation is carried out. Conclusions and further work are derived on the basis of the studies.

