Recent Advances In Feature Extraction Techniques Being Developed For Ultrasonic Examination Of Austenitic Stainless Steel Welds

S. J. Mech; J. S. Emmons; T. E. Michaels

doi:10.1117/12.956751

9 January 1979 Recent Advances In Feature Extraction Techniques Being Developed For Ultrasonic Examination Of Austenitic Stainless Steel Welds

S. J. Mech, J. S. Emmons, T. E. Michaels

Author Affiliations +

Proceedings Volume 0155, Image Understanding Systems and Industrial Applications I; (1979) https://doi.org/10.1117/12.956751
Event: 22nd Annual Technical Symposium, 1978, San Diego, United States

Abstract

This paper describes techniques being developed to characterize the features found during ultrasonic examination of stainless steel welds which are indicative of defects. Ultrasonic waveforms obtained from both defects and grain boundaries have similar time-domain characteristics. This phenomenon, together with variable signal attenuation and dispersion, is commonly encountered. The problem is to develop feature extraction techniques which will enable the examiner to discriminate reliably between weld defect signals and the other noise. Techniques presented use both time and frequency domain algorithms. The use of these techniques has demonstrated significantly better discrimination than conventional ultrasonic methods.

Citation Download Citation

S. J. Mech, J. S. Emmons, and T. E. Michaels "Recent Advances In Feature Extraction Techniques Being Developed For Ultrasonic Examination Of Austenitic Stainless Steel Welds", Proc. SPIE 0155, Image Understanding Systems and Industrial Applications I, (9 January 1979); https://doi.org/10.1117/12.956751

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