Nonlinearized mapping of volumetric defects affecting a metal tube

Abstract : The retrieval of a volumetric defect (singly- or multiply-connected) affecting the wall of a hollow metal tube is investigated from measurements of variations of impedances of an inner probe. Both non-ferromagnetic and ferromagnetic materials are taken into account in view of potential applications. This inverse problem is modeled as the estimation of the shape of a volumetric void defect and then becomes a binary one, solved by properly adapted techniques, two of them analyzed herein: a conjugate-gradient-type one, and a level-set-type one, the performances of which are illustrated by simulations in various configurations.
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Submitted on : Wednesday, February 13, 2013 - 3:30:13 PM
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  • HAL Id : hal-00788032, version 1



Juan Felipe Abascal, Marc Lambert, Dominique Lesselier, Oliver Dorn. Nonlinearized mapping of volumetric defects affecting a metal tube. 13th International Workshop on Non-Destructive Evaluation (ENDE'08), Jun 2008, Seoul, South Korea. pp.Session 8 Modeling. ⟨hal-00788032⟩



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