Image Reconstruction of Defects in Metallic Plates Using a Multi-Frequency Detector System and a Discrete Geometric Approach

This work presents an inversion procedure for the image reconstruction of defects in metallic plates using eddy current testing. We performed a minimization technique based on a discrete geometric approach for eddy currents, and an iteration procedure driven by sensitivity data. In particular we propose a multi-probe detector system excited with multi-frequency signal, in order to increase the number of sensitivity data. In this way we improve the accuracy and efficiency of the inverse procedure