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.
No takes yet. Share an insight, caveat, or question.
Chady et al. (1999) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: