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Flaw Detection in Ultrasonics Using Wavelets Transform and Split Spectrum Processing

DRAI Redouane, KHELIL Mohamed & BENCHAALA Amar
Centre de Recherche Scientifique et Technique en Soudage et Contrôle (CSC), Laboratoire de Traitement du Signal et de l'Image, Route de Dely-Ibrahim, BP 64, Chéraga, Alger, Algérie
Tel. & Fax : (213) 2 36 18 50
Email.: redouane_drai@hotmail.com
Contact

Abstract :

Introduction :

1. Problem position

2. Split Spectrum Processing (SSP)

3. Wavelets Transform (4).

Experiments and results

References :

  1. Paradis, L. Development of methods and a device of signal processing adapted to NDT by ultrasonic waves, Thesis of Doctor Engineer, INP Grenoble, (1983).
  2. Drai, R. Khelil, M. & Benchaala, A.
    "Elaboration of some signal processing algorithms in ultrasonic techniques : Application to materials Ndt.". Ultrasonics, Vol.38 (1-8)2000, pp.503-507 - Ed. elsevier.
  3. Bilgutay, N. M., Newhouse, V.L., and Furgason, E.S. "Flaw visibility enhancement by split spectrum processing technique". Ultrasonics symposium. (1981), 878-883.
  4. Rashmi, M., Bilgutay N. M. and Kagan Kaya, O. "Detection of ultrasonic anomaly signals using wavelet decomposition." Materials evaluation (Nov. 1997), 1274-1279.

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