高振幅夹心式压电换能器

HIGH AMPLITUDE PIEZOELECTRIC SANDWICH TRANSDUCER

摘要: 用一维理论分析了由n个元件组成的压电换能器,用传输矩阵方法编程计算了换能器两端面的位移振幅比为最大时的最佳长度比,并作实验验证。实验和理论计算结果基本符合。

Abstract: A piezoelectric transducer consisted of n elements is desctribed by one dimensional theory.By means of transfer matrix operations,a computer program has been made for calculating the resonant frequencies of transducer and distribution of displacement along its axis.It is shown that a maximum ratio of the amplitude at the radiating surface to that at the backing of transducer can be obtained under an optimum length radio of transducer L₅/(L₃+L₄).Theoretical results are compared with measured ones,the two agree fairly well.