Surface crack reconstruction from eddy current images using a direct semi-analytic model

[摘要] A method relying on a direct semi-analytic model is proposed for reconstructing cracks from eddy current images. We consider systems featuring a uniform excitation flow which can be modelled by means of fictitious current sources distributed in the crack volume. Thanks to the relative simplicity of the model a reconstruction method based the comparison of EC images is considered. The sensitivity of different images comparison criteria is studied for 2D surface cracks, leading to a reconstruction method based on a genetic algorithm. Numerical experiments are carried out to examine the performances of the algorithm in terms of convergence and accuracy.

[发布机构] SATIE (ENS Cachan/CNRS/Paris-Saclay University), 61 Avenue du Président Wilson, Cachan; 94230, France^1;L2S, CentraleSupelec-CNRS-Univ. Paris-Sud, 3 Rue Joliot-Curie, Gif sur Yvette; 91192, France^2;LSV (ENS Cachan/CNRS/Paris-Saclay University), 61 Avenue du Président Wilson, Cachan; 94230, France^3

[效力级别] 计算机科学 [学科分类] 计算机科学（综合）

[关键词] Analytic modeling;Comparison criterion;Crack volume;Current sources;Numerical experiments;Reconstruction method;Surface cracks;Uniform excitation