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.