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文章论述了在压电陶瓷材料与前质量块之间以及压电陶瓷材料与后质量块之间分别放置了前机械阻抗匹配器和后机械阻抗匹配器的纵向振动换能器的特性.具有不同机械阻抗匹配器,为换能器提供了双调谐的特性.然而,通过对前、后匹配器的适当的设计能对换能器响应的调谐频率作出予报.本文计算了这种换能器的电导纳和发射电压响应表达式,为了获得所要求的宽带特性,应用计算机模拟和计算机设计来确定匹配器的适当参数值.上述换能器的数值计算结果表明,其发射电压响应的3dB带宽超过一个倍频程.并与实验结果相吻合.理论的电导纳与实验结果也大体上相一致.
The article discusses the characteristics of a longitudinal vibratory transducer in which a front mechanical impedance matcher and a rear mechanical matcher are placed between a piezoelectric ceramic material and a front mass and between a piezoelectric ceramic material and a back mass, respectively. The mechanical impedance matcher, which provides double tuning of the transducer, however, the tuning frequency of the transducer response can be reported by proper design of the front and rear matchers.This paper calculates the effect of this transducer Of the conductance and emission voltage response expression, in order to obtain the required broadband characteristics, the application of computer simulation and computer design to determine the appropriate parameters of the matcher.The numerical calculation of the transducer results show that the emission voltage response 3dB bandwidth More than one octave.And consistent with the experimental results.The theoretical admittance and experimental results are generally consistent.