发明名称 |
Frequency-controlled scanning of ultrasonic beams |
摘要 |
An ultrasonic wave transducer is formed from a body of piezoelectric material having nonuniform thickness. Each location on the transducer is resonant at a different frequency according to the thickness at that point. By changing the frequency of the applied excitation signal, the origin and direction of the radiation can be altered.
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申请公布号 |
US4350917(A) |
申请公布日期 |
1982.09.21 |
申请号 |
US19800157417 |
申请日期 |
1980.06.09 |
申请人 |
RIVERSIDE RESEARCH INSTITUTE |
发明人 |
LIZZI, FREDERIC L.;WEIL, KURT W. |
分类号 |
B06B1/06;G10K11/34;(IPC1-7):H03J3/28;H03H9/40;A61B10/00 |
主分类号 |
B06B1/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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