谐振腔声气体传感器的电路模型与计算机仿真

提出了一种谐振腔声气体传感器的等效电路修正模型。该模型将FMYB和Babak模型相结合，运用谐振腔与传输线的相似性、Babak模型利用LC回路等效声谐振腔的谐振频率，电阻变化模拟气体粘滞性和反射界面损失的基础上，提出将谐振腔气流损失等效为一定大小的负载电阻，使得新模型能够精确模拟不同气体浓度的声阻抗和谐振频率变化。实验表明：新模型在38．5～41．0KHz频率范围内不仅能模拟声气体传感器的阻抗变化趋势，而且能精确地计算声气体传感器的阻抗值，从而得出相应的气体浓度变化。

Electrical Modeling and Simulation of a Resonant Acoustic Gas Sensor

A modified equivalent circuit model of an acoustic gas sensor with resonator is introduced in this paper.Based on FMYB and Babak models,our modified RCL-link model simulates the impedance curve in terms of amplitude and resonant frequency well.In the new model resonator is equivalent to RCL-link and the characteristics of acoustic radiation is also included.It not only tells the trend of an impedance curve,but also gives the value exactly incertain frequency range from 38.5~41.5KHz.This modeling would be a ...