Ultrasonic transmitter-receiver

申请公布号：

EP0874351(A2)

申请号：

EP19970121323

申请日期：

1997.12.04

申请公布日期：

1998.10.28

申请人：

MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人：

YAMAGUCHI, TAKESHI;TAKADA, MASAHIRO;NOMURA, NOBORU;KAWASAKI, OSAMU;ISHIHARA, HIROTAKA

分类号：

H04R17/00;G01B17/00;G01S7/521;G01S15/02;G10K9/122;G10K11/02;G10K11/08;(IPC1-7):G10K9/122

主分类号：

H04R17/00

摘要：

<p>In an ultrasonic transmitter-receiver for an apparatus for measuring the position or distance of an object, a composite vibrating unit is constructed with a piezoelectric vibrator (10) and a cone (11), wherein a substantial conical vertex of the cone is connected to a center of vibration of the piezoelectric vibrator, and a node of vibration (17) is generated on the cone at positions symmetrical about its center axis when the piezoelectric vibrator vibrates with deflection. &lt;IMAGE&gt;</p>