Development and Validation of a 3D Model of a Magneto-Optic/Eddy Current Imager by a Dyadic Green's Functions Formalism

摘要

This paper deals with the development of a 3D electromagnetic model of a plane wire inducing eddy-currents in a flat flawed conductive media as in the case of a magneto-optic imager. The described model is based on the dyadic Green's functions formalism to solve the forward problem. The response of the flaw is observed via a pick-up coil scanning the surface above the investigated region. Thus, the normal component of the magnetic field is evaluated by the model. Simulated data provided by the model are compared to 3D finite element data and to experimental data. The validation of the proposed model is intently tested before a future work considering the inverse problem. The proposed model is also exploited in order to simulate a countersunk head rivet with a buried crack.