Nonlinearized mapping of volumetric defects affecting a metal tube

Juan Felipe P. J. Abascal (1) , Marc Lambert (1) , Dominique Lesselier (1) , Oliver Dorn (2)

1 L2S - Laboratoire des signaux et systèmes
2 Modelling and Numerical Simulation

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.

Domaines: Electromagnétisme

Juan Felipe P. J. Abascal, Marc Lambert, Dominique Lesselier, Oliver Dorn. Nonlinearized mapping of volumetric defects affecting a metal tube. Y.-K. Shin and H.-B. Lee and S.-J. Song. Electromagnetic Non--Destructive Evaluation (XII), IOS Press, pp.172--179, 2009, Studies in Applied Electromagnetics and Mechanics, ⟨10.3233/978-1-60750-023-0-172⟩. ⟨hal-00433485⟩