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宽带光声光谱技术在甲烷浓度探测中的应用

Application of Broadband Photoacoustic Spectroscopy in Methane Concentration Detection

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摘要

利用宽带光源设计了用于探测甲烷浓度的光声光谱系统,在22 Hz最佳调制频率下对甲烷浓度进行了探测,利用Allan方差分析了系统的稳定性,评估了系统的最低探测浓度。研究结果表明,系统对甲烷浓度(体积比)的探测极限能达到1×10-6。利用宽带光声光谱系统及基于分布反馈式二极管激光光源和长光程吸收池的直接吸收光谱探测系统同时对甲烷浓度进行探测,得到宽带光声光谱系统对甲烷浓度探测的误差约为8%。

Abstract

A photoacoustic spectroscopy detection system based on a broadband light source is introduced, and the methane concentration is detected at the optimum modulation frequency of 22 Hz; further, the stability and the minimum detection concentration of the system are analyzed with Allan variance. The research results exhibit that the concentration (volume ratio) detection limit of methane can exceed 1 × 10-6. The methane concentration is detected by broadband photoacoustic system and direct absorption detection system based on distributed feedback diode laser source with a long path absorption cell simultaneously. The detected results show that the error of methane concentration detection by the broadband photoacoustic system is about 8%.

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中图分类号:O433.5

DOI:10.3788/LOP56.043001

所属栏目:光谱学

基金项目:国家自然科学基金(41475023)、安徽省自然科学基金(1808085MF189)

收稿日期:2018-07-01

修改稿日期:2018-08-30

网络出版日期:2018-09-03

作者单位    点击查看

查申龙:安庆师范大学物理与电气工程学院, 安徽 安庆 246133
马宏亮:安庆师范大学物理与电气工程学院, 安徽 安庆 246133
查长礼:安庆师范大学物理与电气工程学院, 安徽 安庆 246133
陈家金:中国科学院安徽光学精密机械研究所, 安徽 合肥 230031
黄星:安庆师范大学物理与电气工程学院, 安徽 安庆 246133
刘锟:中国科学院安徽光学精密机械研究所, 安徽 合肥 230031
占生宝:安庆师范大学物理与电气工程学院, 安徽 安庆 246133

联系人作者:刘锟(liukun@aiofm.ac.cn)

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引用该论文

Zha Shenlong,Ma Hongliang,Zha Changli,Chen Jiajin,Huang Xing,Liu Kun,Zhan Shengbao. Application of Broadband Photoacoustic Spectroscopy in Methane Concentration Detection[J]. Laser & Optoelectronics Progress, 2019, 56(4): 043001

查申龙,马宏亮,查长礼,陈家金,黄星,刘锟,占生宝. 宽带光声光谱技术在甲烷浓度探测中的应用[J]. 激光与光电子学进展, 2019, 56(4): 043001

被引情况

【1】刘新,张婷,张刚,高光珍,蔡廷栋. 基于光声光谱技术的CO气体探测. 中国激光, 2020, 47(1): 111002--1

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