Transmission of larger amplitude ultrasound with SiC transistor pulser for subharmonic signal measurements at closed cracks

Ren Koda, Tsuyoshi Mihara, Katsuhiro Inoue, Goki Konishi, Yoshio Udagawa

Research output: Contribution to journalConference article

Abstract

With measurements using the Subharmonic Phased Array for Crack Evaluation system, transmission of large-amplitude ultrasound is required to generate subharmonics near closed cracks. We designed a new pulser using a SiC transistor making larger currents available with low output impedance to generate large-amplitude signals. We report on the efficacies of the pulser in comparison with a conventional pulser. We investigated combinations of excitations from several transducers and the two pulsers by measuring signal amplitude, effective voltage, and electric current for each transducer. By applying larger electric currents, larger excitation amplitudes were produced, even when the capacitance oftransducer was larger.

Original languageEnglish
Pages (from-to)528-531
Number of pages4
JournalPhysics Procedia
Volume70
DOIs
Publication statusPublished - 2015 Jan 1
EventICU International Congress on Ultrasonics, ICU 2015 - Metz, France
Duration: 2015 May 112015 May 14

Keywords

  • SiC transistor pulser;Cracks evaluation
  • Subharmonic signal;Large amplitude ultrasound

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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