一种直接测量压电换能器串联谐振频率和并联谐振频率的新方法  

A novel direct method for measuring the serial and the parallel resonant frequencies of a piezoelectric transducer

作　　者：鲍善惠[1] 

机构地区：[1]陕西师范大学应用声学研究所,西安710062

出　　处：《应用声学》2004年第6期12-15,30,共5页Journal of Applied Acoustics

基　　金：陕西师范大学重点科研基金赞助项目(项目号995004)

摘　　要：本文提出了一种利用补偿原理直接测量压电换能器串联谐振频率fs和并联谐振频率,fp的新方法一补偿法。在这种方法测量原理的基础上,进行了实际测量,并设计了一种实用的测量电路。采用此方法测量的测量结果与电桥法的结果相符得很好。Put forward in this paper is a new and simple method for measuring the serial resonant frequency fs and the parallel resonant frequency fp of a piezoelectric transducer. The main point of this method is to cancel the susceptance of the transducer by paralleling an inverse susceptance to get a pure admittance or, to cancel the reactance by serializing an inverse reactance to get a pure resistance. A practical measuring circuit is given. The measured result by this method coincides with that by the bridge method very well.

关 键 词：压电换能器 串联谐振频率 并联谐振频率 补偿原理 电桥法 

分 类 号：TM935.23[电气工程—电力电子与电力传动] TM915