3D Modeling of a Magneto-Optic Imager by a Dyadic Green’s Functions Approach

Abstract

A 3D semi-analytical model based on dyadic Green's functions is proposed to solve the forward problem for a magneto-optic imager with a simplified eddy-current excitation. The normal component of the magnetic field is evaluated in place of the ferrimagnetic garnet. A comparison between data provided by the model and data computed by a 3D finite element method is presented. Theoretical results are also validated with experimental data obtained by a Magneto-Optic Imager designed by Physical Research Incorporation.

Simulation of Eddy Current Inspection Including Magnetic Field Sensor Such as a Giant Magneto-Resistance Over Planar Stratified Media Components With Embedded Flaws

“…Today, CIVA deals with a large number of NDT configurations which are of interest in ECT. The aim of this contribution is to describe a numerical model based on the volume integral approach [4,5,6] which allows to compute the flaw signal due to a given notch embedded in a planar stratified media. The flaw signal results from the measurement of local, punctual values of the surface magnetic field.…”