Abstract
This paper discusses an imaging of eddy current testing (ECT) data for surface breaking evaluation. The multicoil ECT probe utilized in this paper consists of transmit-receive (TR) type sensors as array elements to obtain the information on crack directions and deep situation. Switching two direction scan modes gives two-dimensional vector mapping as ECT images. The ECT signals of the TR type sensor also give the information on crack directions from their variation displayed on the complex number plane. Extracting a complex number component of the signals makes it possible to visualize directions of proximate EDM notches.
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