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

5th International Workshop on New Computational Methods for Inverse Problems

物理学;计算机科学

Vourc'H, Eric^1 ; Bore, Thierry^1 ; Cai, Caifang^2 ; Soulat, Romain^3

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

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

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/657/1/012015/pdf
DOI  :  10.1088/1742-6596/657/1/012015

学科分类：计算机科学（综合）

来源: IOP

【 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.