Evaluation of Material Plate Proprieties Using Inverse Problem NDT Techniques

Abstract

The defect detection mechanism for eddy current non-destructive testing (NDT) probes is related to the interaction of induced eddy currents in the metal test specimen with flaws and the coupling of these interaction effects with the moving test probe. We review in this paper formulation of three dimensional eddy current problems in terms of various magnetic and electric potentials in order to predict change in impedance of an absolute coil as it scans the metal plate surface along the diagnostic direction for detection of flaws and than evaluate characterization of material using BFGS optimisation method.