压电换能型传感器电学响应特性研究

Study on Electrical Response of Transducing Piezoelectric Sensor

压电元件用作换能型传感器，是一个机电二端网络，压电方程描述了机电转换的关系，而实际应用端口条件将确定传感器的最终输出。文章分析了在理想开路和实际应用条件下的电学响应特性，推导了压电敏感元件在实际应用条件下的传感响应微分方程，给出了传感输出的瞬态响应表达式。

When piezoelectric device is used as transducing sensor, it is a dual ported device:mechanical input port and electrical output port. Piezoelectric equations describe mechanical electric transmission and port parameters will determine actual output. In this paper, it characterizes the electric response under practical condition and gives out differential equation of transient output.