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压电陶瓷换能器在超声波测距仪中的应用
引用本文:毛剑波. 压电陶瓷换能器在超声波测距仪中的应用[J]. 合肥工业大学学报(自然科学版), 2005, 28(6): 696-698
作者姓名:毛剑波
作者单位:合肥工业大学,理学院,安徽,合肥,230009
摘    要:文章介绍了超声波测距的原理,论述了超声波测距仪的主要部件——压电陶瓷换能器的结构设计。证实将振子设计成压电陶瓷和金属片的矩形粘合片的形式,可实现与空气声阻抗良好的匹配。并当谐振频率为36kHz时,弯曲振动模式产生的超声场呈扇形,使所发射的超声波在空气中的传播效率较高,满足了仪器对检测范围、精度和灵敏度的要求。

关 键 词:压电陶瓷  换能器  超声波  测距
文章编号:1003-5060(2005)06-0696-03
修稿时间:2004-07-21

Application of the piezoelectric ceramic transducer to the ultrasonic distance measurement device
MAO Jian-bo. Application of the piezoelectric ceramic transducer to the ultrasonic distance measurement device[J]. Journal of Hefei University of Technology(Natural Science), 2005, 28(6): 696-698
Authors:MAO Jian-bo
Abstract:The principle of ultrasonic distance measurement is introduced. The piezoelectric ceramic transducer,which is the main part of the ultrasonic distance measurement device,is designed. A kind of rectangular binding structure of piezoelectric ceramic and thin metal is adopted to make the vibration element match the air acoustical impedance. As the resonance frequency is 36 kHz,the bending vibration mode can result in a sectorial ultrasonic field in which the ultrasonic transmission efficiency is good in the air. With the piezoelectric ceramic transducer,the requirement of the device in measurement scope, precision and sensitivity are satisfied.
Keywords:piezoelectric ceramic  transducer  ultrasonic  distance measurement
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