Surface crack reconstruction from eddy current images using a direct semi-analytic model. (November 2015)

• Record Type: Journal Article
• Authors: Vourc'h, Eric; Bore, Thierry; Cai, Caifang; Soulat, Romain
• Is Part Of: Journal of physics. Number 657(2015)
• Publication Date: 2015-11
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/657/1/012015
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: 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.