Defect localization and characterization in Eddy current nondestructive testing by change detection and global optimization

Abstract : Purpose: This paper presents a data processing methodology combining kernel change detection (KCD) and efficient global optimization (EGO) algorithms for solving inverse problem in eddy current non-destructive testing (EC-NDT). The main purpose is to reduce the computation cost of EC data inversion that is essentially due to the heavy forward modelling with finite element method (FEM) and the non-linearity of the parameter estimation problem. Design/methodology/approach The KCD algorithm is adapted and applied to detect damaged parts in an inspected conductive tube using probe impedance signal. The localization step allows to reduce the number of measurement data that will be processed for estimating the flaw characteristics using a global optimization algorithm (EGO). Actually, the minimized objective function is calculated from data related to defect detection indexes provided by KCD. Findings Simulation results show the efficiency of the proposed methodology in terms of defect detection and localization, a significant reduction of computing time is obtained in the step of defect characterization. Originality/value The combination of a change detection method (KCD) with a global optimization algorithm (EGO) for defect detection and characterization. To show that such approach allows to reduce the numerical cost of ECT data processing.
Type de document :
Article dans une revue
COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, Emerald, 2018, pp.00 - 00. 〈10.1108/COMPEL-05-2017-0201〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01720109
Contributeur : Saïd Moussaoui <>
Soumis le : mercredi 28 février 2018 - 19:42:06
Dernière modification le : jeudi 19 avril 2018 - 11:46:05

Identifiants

Collections

Citation

Majda Kermadi, Saïd Moussaoui, Abdelhalim Taieb Brahimi, Mouloud Feliachi. Defect localization and characterization in Eddy current nondestructive testing by change detection and global optimization. COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, Emerald, 2018, pp.00 - 00. 〈10.1108/COMPEL-05-2017-0201〉. 〈hal-01720109〉

Partager

Métriques

Consultations de la notice

95