大功率气介声波换能器的研究  

High power air borne transducer

作　　者：林书玉[1] 张福成[1] 郭孝武[1] 董胜林[1] 

机构地区：[1]陕西师范大学应用声学研究所

出　　处：《陕西师大学报（自然科学版）》1995年第4期43-45,共3页Journal of Shaanxi Normal University(Natural Science Edition)

摘　　要：研究了一种大功率气介声波换能器．该换能器由夹心式功率超声换能器及一个弯曲振动金属圆盘组成；推出了换能器各组成部分的共振频率设计方程；设计了一些换能器振子．实验表明，在小信号条件下，换能器的共振频率测试值与理论值符合很好．在大功率条件下，当输入电功率为２００Ｗ时，换能器可长时间工作于脉冲状态下，距声波辐射面１ｍ处的声压级可达１５０ｄＢ．A new type of high power air borne transducer is studied. The transducer consists of a longitudinal sandwiched vibrator and a flexcural circular plate. The resonance frequency equations are derived,and some transducers are made.Experiments show that the measured resonance frequencies tinder small electric signal conditions are in good agreement with the calculated results. Under the conditions of high power of 200 W, the transducer can be operated pulsely for a long time and the SPL can reach 150 dB at the distance of one meter from the transducer's radiating surface.

关 键 词：气介换能器 共振频率 弯曲振动 声波换能器 

分 类 号：TB552[理学—物理]