拉曼光谱气体检测装置设计及应用  

Design and application of Raman spectroscopy gas detection device

作　　者：黄保坤 杨大鹏 赵楚秋 马昕月 沈天阳 孙睿 李雨萌 王子衿 HUANG Baokun;YANG Dapeng;ZHAO Chuqiu;MA Xinyue;SHEN Tianyang;SUN Rui;LI Yumeng;WANG Zijin(School of Science,Jiangsu Ocean University,Lianyungang 222005,China;School of Ocean Engineering,Jiangsu Ocean University,Lianyungang 222005,China)

机构地区：[1]江苏海洋大学理学院,江苏连云港222005 [2]江苏海洋大学海洋工程学院,江苏连云港222005

出　　处：《光散射学报》2024年第3期249-259,共11页The Journal of Light Scattering

基　　金：国家自然科学基金项目(42127806);连云港市科技计划(CX2207);江苏省市场监督管理局科技计划项目(20230842-324408)资助。

摘　　要：以气体状态存在的小分子,它们的拉曼光谱特征性强,谱线本征展宽小,即使在多种气体混合条件下,由于它们的特征拉曼光谱互相重叠较少,也可实现对多成分的同时检测分析。然而,气体的分子密度低,拉曼散射信号弱,限制了拉曼技术在气体检测方面的应用。本文通过多重反射光学设计,提高拉曼光谱的激发效率,通过积分球设计增大拉曼散射信号的收集效率,构建高灵敏、多组分气体同时检出装置,可以实现无接触、无损、现场、原位分析,兼备定性和定量分析功能,对气体浓度的检测浓度范围宽,还适用于同分异构体分析以及同位素取代气体分子的分析,大大拓展了拉曼光谱技术在气体检测中的应用。Small molecules that exist in a gaseous state have their Raman characteristics peaks with small spectral line intrinsic broadening.Even under various gas mixing conditions,their characteristic Raman spectra overlap less,allowing for simultaneous detection and analysis of multiple components.However,the low molecular density of gases and weak Raman scattering signals limit the application of Raman technology in gas detection.This article improves the excitation efficiency of Raman spectroscopy through the design of multiple reflection optics,and increases the collection efficiency of Raman scattering signals through the design of an integrating sphere.A highly sensitive and multi-component gas simultaneous detection device is constructed,which can achieve non-contact,non-destructive,on-site,and in situ analysis,and has both qualitative and quantitative analysis functions.The detection concentration range of gas concentration is wide,and it is also suitable for the analysis of isomers and isotope substituted gas molecules,greatly expanding the application of Raman spectroscopy technology in gas detection.

关 键 词：拉曼光谱 气体 拉曼积分球 原位监控 

分 类 号：O433.4[机械工程—光学工程]