Diffuse field full matrix capture for near surface ultrasonic imaging

J. N. Potter*, P. D. Wilcox, A. J. Croxford

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)
315 Downloads (Pure)

Abstract

This article reports a technique for near-surface ultrasonic array imaging. Information equivalent to an undelayed full matrix of inter-element responses is produced through cross-correlation of a later time diffuse full matrix. This reconstructed full matrix lacks the nonlinear effects of early time saturation present in a directly acquired response. Consequently the near-surface material information usually obscured by this effect is retrieved. Furthermore it is shown that a hybrid full matrix formed through a temporally weighted sum of coherent and reconstructed matrices allows for effective near-surface and bulk material imaging from a single direct-contact experimental realisation.
Original languageEnglish
Pages (from-to)44-48
Number of pages5
JournalUltrasonics
Volume82
Early online date18 Jul 2017
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Diffuse fields
  • Green's functions
  • Imaging
  • Ultrasonics

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