水平剪切声板波的液体黏度传感研究

Study on liquid viscosity sensing with shear-horizontal acoustic plate mode wave

黏度是液体的特征参数之一,在很多应用场合,需要对液体黏度进行测量。以黏性液体为研究对象,通过在液体的弹性张量中加上虚部引入液体黏度,并根据层状介质中声波的传播特性建立了负载黏性液体的水平剪切声板波理论模型。以压电陶瓷PZT-5H为基片材料,通过数值计算和实验分析,表明了水平剪切声板波在一定程度上用于液体黏度传感的有效性,为声板波液体黏度传感器的进一步研究提供了理论指导和应用依据。

Viscosity is one of the characteristic parameters of liquid. The measurement of liquid viscosity is required in many applications. This paper introduces liquid viscosity by adding an imaginary part in liquid elastic tensor. The theoretical model of SH-APM loaded with viscous liquid is built using the propagation characteristics of acoustic wave in laminated mediums. The piezoelectric ceramic PZT-5H is used as the substrate material; Through numerical calculation and experimental analyses, the validity of liquid viscosity sensing with SH-APM model is proved, which provides a guidance for further research on APM liquid viscosity sensors.