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.
|出版ステータス||Published - 2015|
|イベント||ICU International Congress on Ultrasonics, ICU 2015 - Metz, France|
継続期間: 2015 5 11 → 2015 5 14
ASJC Scopus subject areas
- Physics and Astronomy(all)