Abstract
This paper describes the detective characteristics of a planar-type eddy-current testing (ECT) probe for use in advanced ECT technology. The probe has a sandwich structure of meander and mesh coils. The key operation depends on the patterns of both meander and mesh coils for high-frequency excitation and sensing. The particular functions of the probe are the detection of (1)crack size and (2) its direction on the conducting plate. Experimental results confirm that the probe has detective characteristics, and sufficient sensitivity to detect cracks.
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