发明名称 |
ULTRASONIC TRANSMITTER-RECEIVER |
摘要 |
PURPOSE:To give a sharp directional characteristic and high transmission/ reception sensitivity characteristic by sticking an annular thin plate to an annular piezoelectric element. CONSTITUTION:An annular piezoelectric element 11 is stuck to an inner bottom of an annular plate having a V-shaped section for including a normal for passing through the center of a circle. Parabolic-surface hones 20 and 21 are provided inside and outside the thin plate 13 through an elastic rubber 22, etc. Then, the titled receiver shows the directional characteristic similar to a circular piston sound source. As a result, it shows the narrower directivity compared with a conventional one even if a ultrasonic wave emitting area is equal. |
申请公布号 |
JPS6126399(A) |
申请公布日期 |
1986.02.05 |
申请号 |
JP19840146942 |
申请日期 |
1984.07.17 |
申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
TAKAYAMA RYOICHI;ISE YUKIHIKO |
分类号 |
H04R1/30;G01N29/24;G01S7/521;G10K11/02;G10K11/32;H04R17/00 |
主分类号 |
H04R1/30 |
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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