Title :
Matching pursuit-based signal processing method to improve ultrasonic flaw detection in NDT applications
Author :
Ruiz, N. ; Vera, P. ; Curpián, J. ; Martínez, D. ; Mata, R.
Author_Institution :
Departamento de Electronica, Univ. de Jaen, Linares Jaen, Spain
fDate :
2/20/2003 12:00:00 AM
Abstract :
A novel matching pursuit-based signal processing method is proposed to improve ultrasonic flaw detection in non-destructive testing (NDT) applications. The method utilises time-shifted Morlet functions as dictionary elements, since they are well matched with the ultrasonic pulse echoes obtained from the transducer used in the experiments. It is fast enough to be used in the signal processing stage of real-time inspection systems. Experimental results show meaningful SNR improvements for low input SNR´s (below 0 dB).
Keywords :
acoustic signal processing; flaw detection; inspection; iterative methods; real-time systems; ultrasonic materials testing; NDT applications; SNR improvements; US flaw detection; dictionary elements; iterative algorithm; matching pursuit-based signal processing method; nondestructive testing; real-time inspection systems; time-shifted Morlet functions; ultrasonic flaw detection; ultrasonic pulse echoes;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030262
