Ultrasonic imaging system using a leaky surface acoustic wave transducer composed of piezoelectric ceramic and fused quartz
作者:
Kohji Toda,
Akihiro Sawaguchi,
期刊:
Journal of Applied Physics
(AIP Available online 1991)
卷期:
Volume 69,
issue 1
页码: 103-108
ISSN:0021-8979
年代: 1991
DOI:10.1063/1.347745
出版商: AIP
数据来源: AIP
摘要:
An ultrasonic imaging system is described by using a leaky surface acoustic wave (SAW) transducer composed of a piezoelectric ceramic thin plate/interdigital transducer/fused quartz. It is shown, both numerically and experimentally, that three operation modes of the transducer at a water‐solid interface are available. Each of the three modes has a different operation frequency range, corresponding to the leaky SAW velocity. The bulk wave in water as an acoustical coupler between the transducer and a tested object has a frequency‐dependent angle relation; therefore, the acoustic beam steering is easily controlled and flexible in design. The reflection type ofC‐mode ultrasonic imaging results are demonstrated and are promising for nondestructive testing.
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