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Crack detection and recognition using an eddy current differential probe

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3 Author(s)
Chady, T. ; Fac. of Eng., Oita Univ., Japan ; Enokizono, M. ; Sikora, R.

This paper proposes a new eddy current differential sensor and a system for multi-frequency testing of conducting plates. Precise crack imaging was achieved by the use of spectrograms obtained from an eddy-current probe multi-frequency response and application of a neural network. Results of experiments with test specimens made of SUS304 showing very good sensitivity and spatial resolution are presented. The possibility of detection of an opposite side 20% crack was also confirmed

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Magnetics, IEEE Transactions on  (Volume:35 ,  Issue: 3 )