Selectivity enhancement of subharmonic phased array for crack evaluation (SPACE)

Kazushi Yamanaka, Yoshikazu Ohara

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


To enhance the selectivity of subharmonic phased array for crack evaluation (SPACE) we propose long burst SPACE with narrowband spectrum. But image of a scatterer is elongated towards direction connecting the object and the center of receiving array (RA). However, since the inclination angle is changed by changing the position of the RA, the invariant part of the images obtained with different RA positions gives true image of the scatterer, with an improved temporal resolution. In this study, we show a simulation of this method using product of image intensity with different RA positions.

Original languageEnglish
Pages (from-to)824-831
Number of pages8
JournalAIP Conference Proceedings
Publication statusPublished - 2009
EventReview of Progress in Quantitative Nondestructive Evaluation - Chicago, IL, United States
Duration: 2008 Jul 202008 Jul 25


  • Crack size measurement
  • Fatigue crack
  • Nonlinear ultrasound
  • Phased array
  • Subharmonic

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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