基于半导体激光吸收谱的在线CO和CO_2浓度同时测量技术  

An on-line CO and CO_2 concentration measurement technology based on LDAS

作　　者：顾海涛[1,2] 王欣[2] 王健[1,2] 张文艳[2] 施跃华[2] 黄伟[2] 

机构地区：[1]杭州电子科技大学电子信息学院,浙江杭州310018 [2]聚光科技(杭州)有限公司,浙江杭州310052

出　　处：《光电子．激光》2009年第8期1070-1073,共4页Journal of Optoelectronics·Laser

基　　金：国家"863"计划资助项目(2006AA040310)

摘　　要：优选了中心频率分别为6338.5895cm-1和6337.99cm-1的CO和CO2吸收谱线,使用一个激光器扫描经过该对谱线,在搭建的实验系统上实现了对CO和CO2的同时测量,实验结果表明,基于半导体激光吸收谱(DLAS)的CO和CO2检测下限分别为3σ=0.042%和3σ=0.022%,CO和CO2的线性相关系数分别为0.9999和0.9996,CO和CO2相互间干扰小于1%。现场测量结果表明,该技术能够较好地满足工业过程、机动车尾气和环保等的CO和CO2浓度同时测量的需要。Diode laser absorption spectroscopy(DLAS)has developed into an important analytical technique,which has been applied to analyze gas concentration in industry,it usually only can measure single gas' concentration.In this work a pair of CO and CO2 lines whoise center frequencies are respectively 6 338.589 5 cm-1 and 6 337.99 cm-1 are selected are tested simultaneously with a diode laser scanning the pair of lines.Wavelength modulation spectroscopy(WMS)and coherent electronic detection techniques are adopted i...

关 键 词：半导体激光吸收光谱 调制吸收光谱 在线浓度测量 CO CO2 

分 类 号：TN248[电子电信—物理电子学]