New speckle noise suppression technique using cross-correlation of array sub-apertures in ultrasonic NDE of coarse grain materials

Timothy Lardner, Minghui Li, Rui Gongzhang, Anthony Gachagan

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

7 Citations (Scopus)

Abstract

In ultrasonic NDE, materials with coarse grains are difficult to inspect because a significant portion of energy will be reflected by the grains which cause speckle noise when imaging. Coarse grain materials are widely used in industry therefore a suitable inspection technique must be developed. This paper presents Spatially Averaged Sub-Array Correlation Imaging (SASACI), an advanced method that reduces speckle noise. SASACI was validated through comparison with the Total Focusing Method. A mean noise reduction of over 20dB SNR was observed when inspecting a highly scattering nickel alloy at 5MHz with a 128 element array.
Original languageEnglish
Title of host publicationReview of Progress in Quantitative Nondestructive Evaluation
EditorsD.O. Thompson, D.E. Chimenti
Place of PublicationMelville
Pages865-871
Number of pages7
Volume32A and 32B
DOIs
Publication statusPublished - 2013
Event39th Annual Review of Progress in Quantative Nondestructive Evaluation (QNDE) - Denver, United States
Duration: 15 Jul 201220 Jul 2012

Publication series

NameAIP Conference Proceedings
PublisherAIP
Volume1511
ISSN (Print)0094-243X

Conference

Conference39th Annual Review of Progress in Quantative Nondestructive Evaluation (QNDE)
CountryUnited States
CityDenver
Period15/07/1220/07/12

Keywords

  • ultrasound
  • beamforming
  • NDE
  • speckle
  • noise suppression technique
  • cross-correlation
  • ultrasonic NDE
  • coarse grain materials
  • array
  • sub-apertures

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    Lardner, T., Li, M., Gongzhang, R., & Gachagan, A. (2013). New speckle noise suppression technique using cross-correlation of array sub-apertures in ultrasonic NDE of coarse grain materials. In D. O. Thompson, & D. E. Chimenti (Eds.), Review of Progress in Quantitative Nondestructive Evaluation (Vol. 32A and 32B, pp. 865-871). (AIP Conference Proceedings; Vol. 1511).. https://doi.org/10.1063/1.4789135