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Metrological characterization of an eddy-current-based system for non-destructive testing

A low-cost probe for non-destructive testing on conductive materials was realized and tested. It is based on the measurement of the magnetic field produced by eddy currents and perturbed by the presence of cracks. The magnetic sensor used, characterized by the authors in a previous work, gives an output that, suitably processed, allow both amplitude and phase of the magnetic field to be measured. The preliminary tests reported confirm the feasibility of the proposed probe in detecting cracks, and in correctly identifying their direction and depth.