Defect Detection by Split Spectrum Processing and Discrete Wavelet Transform in Coarse Grains Materials

Auteurs :  Redouane DRAI, Abdessalem BENAMMAR, Mohamed KHELIL, Amar BENCHAALA
Année : 2004
Domaine : Electronique
Type : Communication
Conférence: Proceedings du 7ème Congrès Français d’Acoustique
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés : Ultrasonic NDE, Defect Detection, split spectrum processing, DWT

Résumé : 

In this work, we propose in one hand, to develop algorithms based on Split Spectrum Processing (SSP) with Q constant method associated to "Group delay moving entropy" (GDME), and on the second hand, to develop a method based on Discrete Wavelet Transform (DWT). These algorithms allow detecting and locating imperfections echoes drowned in the structural noise of materials.