可调谐激光光谱系统在气体检测中的应用

›› 2013, Vol. 26 ›› Issue (12): 107-.

可调谐激光光谱系统在气体检测中的应用

刘建昌,邓广福

(德州学院机电系,山东德州 253023)

出版日期:2013-12-15 发布日期:2014-01-10
作者简介:刘建昌(1991—),男,本科。研究方向:测控技术。E-mail:elecair@163.com
基金资助:
德州市科技发展计划基金资助项目(2011B03)

Application of the Tunable Laser Spectroscopy System in Gas Detection

LIU Jian-Chang, DENG Guang-Fu

(Department of Machines and Electronic,Dezhou College,Dezhou 253023,China)

Online:2013-12-15 Published:2014-01-10

摘要/Abstract

摘要：

为准确快速地检测气体浓度,对可调谐激光吸收光谱法进行了分析。从理论分析可知,偶次谐波分量在谐振位置有最大值,且幅度逐次下降,因此采用二次谐波检测的方法来获取气体浓度。建立了气体浓度检测实验系统,对浓度在0%～15％之间的甲烷气体试样进行了实验研究。理论分析及实验结果表明,二次谐波的幅度值与气体浓度值之间的线性相关度可达0.994,说明通过二次谐波可以准确获得气体的浓度信息。

关键词: 光谱学, 可调谐激光光谱, 谐波分析, 浓度检测

Abstract:

The tunable diode laser absorption spectroscopy is adopted for quick and precise gas concentration measurement.Theoretical analysis shows that the even harmonics reach maximum at the resonant location and its amplitude drops successively,and therefore the concentration of gas can be obtained by the second harmonic detection method.An experimental system is established to detect the concentration of 0%~ 15% CH4 gases.Theoretical analysis and experimental results show that the linear dependency between the amplitude of second harmonic and the concentration value of gas can reach 0.994,indicating that accurate concentration value of gas can be obtained by second harmonic.

Key words: spectroscopy;tunable laser spectroscopy;harmonic analysis;concentration detection

中图分类号:

O433.1

刘建昌, 邓广福. 可调谐激光光谱系统在气体检测中的应用[J]. , 2013, 26(12): 107-.

LIU Jian-Chang, DENG Guang-Fu. Application of the Tunable Laser Spectroscopy System in Gas Detection[J]. , 2013, 26(12): 107-.

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