3-D inversion of eddy current data for non-destructive evaluation of steam generator tubes - EMG - Département Electromagnétisme Accéder directement au contenu
Article Dans Une Revue Inverse Problems Année : 1998

3-D inversion of eddy current data for non-destructive evaluation of steam generator tubes

Résumé

Three-dimensional (3D) eddy current non-destructive evaluation of steam generator tubes is cast in a wavefield integral framework and considered from an inverse problem point of view. Three inversion algorithms based on a gradient-type iterative search are studied: the modified gradient method, an inversion via the source-type integral equation, and one based on the localized nonlinear approximation. To overcome the inherent ill-posed nature of the inversion problem, a binary constraint is enforced on the contrast to be retrieved. Special attention is devoted to the evolution of the iterative processes, which is controlled by means of a tunable 'cooling' parameter. The difficulty of such 3D reconstructions is discussed with emphasis on attenuation problems that are typical in eddy current analysis.

Dates et versions

hal-00637687 , version 1 (02-11-2011)

Identifiants

Citer

Vikass Monebhurrun, Bernard Duchêne, Dominique Lesselier. 3-D inversion of eddy current data for non-destructive evaluation of steam generator tubes. Inverse Problems, 1998, 14, pp.707-724. ⟨10.1088/0266-5611/14/3/019⟩. ⟨hal-00637687⟩
86 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More