The main aspects are as follows:1. Derivate the resonance frequency equation according to the electro-mechanical equivalent circuit of sandwichtransducer.
主要工作如下：1、根据夹心式换能器的机电等效电路图，推导了换能器的整体频率方程。
2
By changing the stack position and quantity of the piezoelectricity chip of piezoelectric ceramic sandwichtransducer we can make the washing transducer bear two obvious resonance peaks.
通过改变夹心式换能器压电晶片的堆放位置及组数，使超声清洗换能器具有两个明显的谐振峰。
3
Sandwichtransducer with composite horn combines the advantage of high power of sandwichtransducer and the benefits of broad beamwidth of piston like transducer with small emitting area.