1. Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine MechanicsChinese Academy of Sciences, Hefei 230031, China
2. University of Science and Technology of China, Hefei 230026, China
3. Key Laboratory of Optical Monitoring Technology for Environment, Hefei 230031, China
Abstract：In this work, using a 266 nm laser as the excitation light source of the detection system, the water Raman spectra under the oil film of different thicknesses were obtained based on the laser-induced water Raman spectroscopy technology. The Gaussian function fitting method was used to correct the interference of the fluorescence spectrum on the Raman spectrum. And then, the oil film thickness inversion model could be established according to the water Raman suppression method combined with the nonlinear least square optimization algorithm. The results show that the six oils’ detectable oil film thickness range (92# gasoline, 0# diesel, Mobil oil 20w-40, Shell Helix10w-40, Lifeguard Fluid AG6 and crude oil) is from 0.19 to 379.22 μm. The average relative error of oil film thickness prediction ranges from 8.14% to 15.81% according to the water Raman spectrum-oil film thickness inversion model. This method can realize the measurement of micron-level oil film under laboratory conditions.
Key words：Oil film thickness; Raman spectroscopy; Rapid detection
基金资助: supported by National Natural Science Foundation (61805255, 61378041), National Key R&D Program of China (2017YFF0108402, 2016YFC1400602), Anhui Natural Science Foundation (1808085MF208), Anhui Key Research and Development Plan Project(1804a0802192), Anhui Province Science and Technology Major Project (17030801033)
作者简介: CHEN Yu-nan, (1992-), female, Ph. D, University of Science and Technology of China e-mail: ynchen@aiofm.ac.cn
引用本文:
陈宇男，杨瑞芳，赵南京，祝 玮，陈晓伟，张瑞琦. 基于激光诱导水拉曼抑制法的油膜厚度测量方法研究[J]. 光谱学与光谱分析, 2022, 42(12): 3954-3962.
CHEN Yu-nan, YANG Rui-fang, ZHAO Nan-jing, ZHU Wei, CHEN Xiao-wei, ZHANG Rui-qi. Research on Measuring Oil Film Thickness Based on Laser-Induced Water Raman Suppression Method. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(12): 3954-3962.
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