厚み縦振動の楔形超音波振動子について

概要

論文の詳細を見る
Usually ultrasonic transducers can only radiate ultrasonic waves of a narrow bandwidth, but it is possible to make a broad bandwidth by making a wedged type. The wedged transducers are made of PZT having the thickness extensional vibration. The fundamental characteristics of them are investigated, and the applications using them are attempted. First, the frequency characteristics of the free impedance and of the phase of the wedged transducers are measured. Also, the radiation patterns are observed using the schlieren method. Next, as the applications using those transducers two experiments are attempted. The one is the ultrasonic radiation of a broad bandwidth toward one direction using the semicylindrical wedged transducer. The other is the ultrasonic thickness measurement with resonance technique using the plate wedgrd and semicylindrical wedged transducer.
社団法人日本音響学会の論文
1982-12-01