微悬臂梁传感系统在乙醇挥发检测中的应用

Application of microcantilever sensor system in ethanol volatilization detection

针对乙醇挥发性不易检测的问题,建立了一种基于微悬臂梁传感器的乙醇自挥发检测系统,采用光杠杆检测方法研究了乙醇自挥发对微悬臂梁挠度的影响。光电位置敏感探测器接收响应信号,在LabVIEW上实现了数据的处理和可视化功能,对乙醇体积与相应挥发时间的关系进行了曲线拟合,估算了短挥发时间下乙醇的体积量。实验结果表明:乙醇自挥发使微悬臂梁偏转位移逐渐减小,最终趋于恒定。乙醇挥发时间与微梁响应的最大偏转位移、乙醇体积量正相关。

Aiming at the problem that the volatility of ethanol is not easy to detect,an ethanol self-evaporation detection system based on microcantilever sensor is established. The effect of ethanol self-evaporation on deflection of microcantilever is studied by optical lever detection method. The photoelectric position sensitive detector receives response signal,data processing and visualization function in Lab VIEW is realized,the relationship between ethanol volume and the corresponding evaporation time is fitted,and the volume of ethanol in short evaporation time is estimated. The experimental results show that the self-evaporation of ethanol makes the deflection displacement of the microcantilever gradually decrease and eventually tends to be constant. The evaporation time of ethanol is positively correlated with the maximum deflection displacement of the microbeam response and the volume of ethanol.