混合气体成分光声光谱分析的非线性拟合法  

Photoacoustic Measurement of Multi-component Gas Mixtures Applying Nonlinear Fitting Algorithm

作　　者：杨晓龙[1] 于清旭[1] 李少成[1] 

机构地区：[1]大连理工大学物理系,辽宁大连116024

出　　处：《光电子．激光》2003年第2期163-167,共5页Journal of Optoelectronics·Laser

基　　金：高等学校博士学科点专项科研基金资助项目(1999014106)

摘　　要：采用激光腔内光声光谱技术分析微量气体含量,通过Levenberg-Marquardt拟合方法处理实验数据,有效地消除了混合气体中CO2气体对其他气体浓度检测结果的影响。利用该光谱仪,分别对摩托车尾气和富士苹果释放的C2H4和CO2气体浓度进行了测量,结果证明了非线性拟合分析方法的有效性。The concentrations of multi-component gas mixture were quantitatively measured with a multiline detection technique, and the Levenberg-Marquardt algorithm for fitting nonlinear functions was applied to a waveguide CO2 laser based on intracavity photoacoustic spectrometer to calculate the concentrations of multi-component gas mixture containing CO2 gas. Experiments have been carried out on measuring C2H4 and CO2 concentration released from a Fuji apple and a motorbike exhaust respectively. The experimental results demonstrated the availability and validity of the nonlinear fit algorithm.

关 键 词：混合气体成分 光声光谱仪 微量气体测量 非线性拟合 气体光声信号 

分 类 号：TH744.4[机械工程—光学工程]