Russian Journal of Nondestructive Testing

, Volume 54, Issue 1, pp 17–30 | Cite as

Pattern-Noise in Ultrasonic Inspection of Articles Made of Complexly Structured Materials

  • V. G. Kartashev
  • V. K. Kachanov
  • I. V. Sokolov
  • L. V. Voronkova
  • R. V. Kontsov
Acoustic Methods
  • 6 Downloads

Abstract

Pattern-noise (PN) that occurs due to combined reflection of an ultrasonic probing signal from acoustic inhomogeneities in the material structure is an interference that conceals echo-signals from flaws. The most efficient method for extracting echo-signals from PN is multichannel spacetime signal processing (STSP). Different inspection purposes dictate different configurations of STSP schemes with the parameters that are determined by PN correlation characteristics. A theoretical model has been used to determine mutual PN correlation characteristics for the main types of transducers. The theoretical results have been confirmed experimentally.

Keywords

ultrasonic inspection of articles made of complexly structured materials space-time signal processing pattern-noise correlation characteristics 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • V. G. Kartashev
    • 1
  • V. K. Kachanov
    • 1
  • I. V. Sokolov
    • 1
  • L. V. Voronkova
    • 2
  • R. V. Kontsov
    • 1
  1. 1.Moscow Power Engineering InstituteMoscowRussia
  2. 2.Central Scientific-Research Institute for Precision Machine EngineeringMoscowRussia

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