A High Resolution Pursuit-based approach for detecting ultrasonic flaw echoes

Author

Ruiz-Reyes, N. ; Vera-Candeas, P. ; Curpian-Alonso, J. ; Canadas-Quesada, F.

Author_Institution

Electron. & Telecommun. Eng. Dept., Univ. of Jaen, Linares, Spain

fYear

2006

fDate

4-8 Sept. 2006

Firstpage

1

Lastpage

5

Abstract

A new NDT method to detect ultrasonic flaw echoes close to the surface in strongly scattering materials is proposed. The method is based on High Resolution Pursuit (HRP), which is a version of Matching Pursuit (MP) that emphasizes local fit over global fit. Since HRP produces representations which resolve closely spaced features, it is a very valuable signal processing tool for achieving the goal claimed in this work. Furthermore, HRP has the same order of complexity of MP. The good performance of the method is experimentally verified using ultrasonic traces acquired from a Carbon Fibre Reinforced Plastic (CFRP) material.

Keywords

carbon fibre reinforced plastics; flaw detection; iterative methods; time-frequency analysis; ultrasonic materials testing; ultrasonic scattering; NDT method; carbon fibre reinforced plastic material; global fit; high resolution pursuit-based approach; local fit; matching pursuit; signal processing tool; strongly scattering materials; ultrasonic flaw echo detection; ultrasonic traces; Abstracts; Damping; Plastics; Synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2006 14th European

Conference_Location

Florence

ISSN

2219-5491

Type

conf

Filename

7071243