J. Phys. IV France 02 (1992) C1-637-C1-640
APPLICATION DE L'ANALYSE EN ONDELETTES À LA DÉTECTION DE FISSURES PAR ÉCHOGRAPHIE ULTRASONOREJ.P. LEFEBVRE and P. LASAYGUES
Laboratoire de Mécanique et d'Acoustique, 31 Ch. Joseph-Aiguier, F-13402 Marseille cedex 9, France
This paper is related to the problem of echographic detection of cracks under coatings. It is concerned with both modelization and signal processing. For the modelization of scattering, we have chosen monoscattering approximations (Born for interfaces in material, Physical Optics for cracks) that appear to be very efficient for the problem. As a tool for signal processing, we have chosen a time-scale method, the wavelet analysis, that appears to be very well suited for signal discrimination.
© EDP Sciences 1992