A New Type of Piezoelectric Composite Transducers with High Frequency in Radial Vibration

LIN Shu-yu; CAO Hui

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A New Type of Piezoelectric Composite Transducers with High Frequency in Radial Vibration

更新时间：2025-07-16

- A New Type of Piezoelectric Composite Transducers with High Frequency in Radial Vibration
- Acta Electronica Sinica Vol. 36, Issue 5, Pages: 1004-1008(2008)
- 作者机构：
  
  陕西师范大学应用声学研究所,陕西,西安,710062
- 作者简介：
- 基金信息：
- DOI：
  CLC： O426.2
- Published：2008
- 稿件说明：
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LIN Shu-yu, CAO Hui. A New Type of Piezoelectric Composite Transducers with High Frequency in Radial Vibration[J]. Acta Electronica Sinica, 2008, 36(5): 1004-1008.
DOI：

LIN Shu-yu, CAO Hui. A New Type of Piezoelectric Composite Transducers with High Frequency in Radial Vibration[J]. Acta Electronica Sinica, 2008, 36(5): 1004-1008. DOI：

摘要

本文研究了一种新型的径向振动压电陶瓷高频复合超声换能器.该换能器由一个压电陶瓷圆环和一个嵌于其内部的金属圆盘复合而成.首先对压电陶瓷圆环及金属圆盘的径向振动进行了简单分析

推出了其机电等效电路和共振频率方程

分析了压电陶瓷圆环的几何尺寸对其共振及反共振频率的影响.在此基础上

分析了由压电陶瓷圆环和金属圆盘组成的复合换能器的径向振动

得出了其复合机电等效电路和共振频率方程.研究分析表明

对于具有相同外半径的压电陶瓷圆盘和压电陶瓷圆环

压电陶瓷圆盘的径向振动共振频率高于压电陶瓷圆环的径向共振频率

并且

压电陶瓷圆环的内半径越大

其径向共振频率越低.当在压电陶瓷圆环内部嵌入一金属圆盘而组成一径向复合超声换能器时

其径向共振频率高于压电陶瓷圆盘的径向共振频率

从而达到了提高换能器共振频率的目的.研制了一些径向复合高频超声换能器

并对其共振频率进行了测试

测试数据证明了理论结果的正确性.

Abstract

A new type of piezoelectric composite ultrasonic transducers with high frequency in radial vibration is studied.It is composed of a piezoelectric ceramic ring and a metal disk which is inserted in the inner of the ceramic ring.First

the radial vibration of a piezoelectric ring and a metal disk is analyzed;its electro-mechanical equivalent circuit and the resonance frequency equation are obtained.It is illustrated that when the radius ratio is increased

the resonance and anti-resonance frequency of a piezoelectric ceramic ring is decreased.This means that the resonance frequency of a piezoelectric disk is larger that that of a piezoelectric ring with the same outer radius.Then

the radial vibration of the composite transducer is studied;its compound electro-mechanical equivalent circuit and the frequency equation are given.It is shown that when a metal disk is inserted into the center of a piezoelectric ring

its resonance frequency is higher than that of a piezoelectric ring or a disk.This means that the composite radial piezoelectric transducer can produce radial vibration at high resonance frequency.Experiments show that the measured resonance frequency is in a good agreement with the theoretical results.

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Related Institution

Institute of Applied Acoustics,Shaanxi Normal University

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Department of Electronic and CommunicationZhongshan UniversityGuangzhouGuangdong 510275China

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