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公开(公告)号：US5142511A
公开(公告)日：1992-08-25
申请号：US709798
申请日：1991-06-03
申请人： Harumi Kanai , Yoshiaki Tanaka , Kazuyasu Hikita
发明人： Harumi Kanai , Yoshiaki Tanaka , Kazuyasu Hikita
CPC分类号： B06B1/0625
摘要： A piezoelectric transducer having electrodes formed on both surfaces has a piezoelectric base molded as a curved plate which can converge sound fields of acoustic waves at an arbitrary point and which can reduce noise or reverberation in a lateral direction which otherwise occur due to unnecessary vibration. At least one of the electrodes is divided concentrically. A material having a small electromechanical coupling factor K.sub.p in the lateral direction is used for the piezoelectric material, preferably porous PZT.
摘要翻译： 具有形成在两个表面上的电极的压电换能器具有模制为弯曲板的压电基座，其能够在任意点会聚声波场，并且可以减少由于不必要的振动而发生的横向的噪声或混响。 电极中的至少一个同心地分配。 用于压电材料的横向具有小的机电耦合系数Kp的材料，优选多孔PZT。
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公开(公告)号：US5122993A
公开(公告)日：1992-06-16
申请号：US707307
申请日：1991-05-29
申请人： Kazuyasu Hikita , Harumi Kanai , Yoshiaki Tanaka
发明人： Kazuyasu Hikita , Harumi Kanai , Yoshiaki Tanaka
CPC分类号： B06B1/0625
摘要： A piezoelectric transducer having plural piezoelectric transducer elements which can generate mechanical vibrations converging substantially on one point. The transducer is formed to control the convergent point by insulating piezoelectric transducer elements mechanically, arranging them concentrically and driving them independently and separately from each other.
摘要翻译： 一种具有多个压电换能器元件的压电换能器，其可以产生基本上在一点收敛的机械振动。 传感器形成为通过机械地绝缘压电换能器元件来同心地排列并将它们彼此独立且分开地驱动来控制会聚点。
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