| 可调谐二极管吸收光谱痕量气体浓度算法的研究 |
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| 引用本文： | 王晓梅,张玉钧,刘文清,阚瑞锋,王铁栋,王敏,刘建国,董凤忠.可调谐二极管吸收光谱痕量气体浓度算法的研究[J].光学技术,2006,32(5):717-719. |
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| 作者姓名： | 王晓梅 张玉钧 刘文清 阚瑞锋 王铁栋 王敏 刘建国 董凤忠 |
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| 作者单位： | 中国科学院环境光学与技术重点实验室,中国科学院安徽光学精密机械研究所,合肥,230031 |
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| 基金项目： | 国家自然科学基金资助项目(10274080) |
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| 摘 要： | 基于可调谐二极管激光吸收光谱学的大气痕量气体在线监测分析仪具有高灵敏、快速响应和高选择性的特点。分析了可调谐二极管激光吸收光谱(TDLAS)二次谐波信号的特征,以高浓度谐波信号作为标准,采用线性最小二乘拟合的方法对谐波信号进行数值拟合,高精度的反演出了痕量气体浓度值。并对标准信号和检测信号之间的相关系数和浓度反演规律进行了研究。以甲烷气体的测量信号和浓度反演为例,验证了算法。
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| 关 键 词： | 可调谐二极管激光吸收光谱(TDLAS) 数字信号处理 最小二乘拟合 |
| 文章编号： | 1002-1582(2006)05-0717-03 |
| 修稿时间： | 2005年8月8日 |
Study on the arithmetic of trace gas concentration based on tunable diode absorption spectroscopy |
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| WANG Xiao-mei,ZHANG Yu-jun,LIU Wen-qing,KAN Rui-feng,WANG Tie-dong,WANG Min,LIU Jian-guo,DONG Feng-zhong.Study on the arithmetic of trace gas concentration based on tunable diode absorption spectroscopy[J].Optical Technique,2006,32(5):717-719. |
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| Authors: | WANG Xiao-mei ZHANG Yu-jun LIU Wen-qing KAN Rui-feng WANG Tie-dong WANG Min LIU Jian-guo DONG Feng-zhong |
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| Abstract: | Gas analyzers based on tunable diode-laser absorption spectroscopy(TDLAS) is provide with high sensitivity,fast response and highly specific in situ measurement of atmospheric trace gases.Characteristics of the second harmonic signal with TDLAS were analyzed.A method of the linear least-squares fitting used to deal with second harmonic signal of the measured trace gas based on the signal of high concentration was presented.The concentrations of trace gases were obtained with highly precision.The relationship between concentrations and the correlation coefficient was studied.Some measurements of methane were presented and discussed. |
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| Keywords: | tunable diode-laser absorption spectroscopy(TDLAS) digital signal processing linear least-squares fitting |
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