| 基于可调谐半导体激光吸收光谱的瓦斯监测方法研究 |
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| 引用本文： | 陈东,刘文清,阚瑞峰,王敏,张玉钧,刘建国.基于可调谐半导体激光吸收光谱的瓦斯监测方法研究[J].光学技术,2006,32(4):598-600. |
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| 作者姓名： | 陈东 刘文清 阚瑞峰 王敏 张玉钧 刘建国 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所环境光学与技术重点实验室 合肥230031 |
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| 基金项目： | 中国科学院资助项目
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国家科技攻关项目 |
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| 摘 要： | 瓦斯爆炸是煤矿安全的主要威胁,对瓦斯气体浓度进行准确、快速、实时监测和预警是治理瓦斯灾害的有效手段。实验研究了近红外半导体激光吸收光谱技术在煤矿瓦斯气体安全检测中的应用。系统光源采用的是1.65μm波长的近红外可调谐DFB激光器,使用了波长调制和二次谐波检测技术,通过光纤进行信号传输。系统检测限低于0.09%,气体浓度的检测速度最高可达到0.02s。研究表明:该技术具有实时、连续、快速、非接触检测的特点;现场无带电部件,具有多点分布式遥测的能力,能够满足煤矿瓦斯安全检测的要求。
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| 关 键 词： | 可调谐半导体激光吸收光谱 波长调制光谱 瓦斯 |
| 文章编号： | 1002-1582(2006)04-0598-03 |
| 收稿时间： | 2005/6/10 |
| 修稿时间： | 2005年6月10日 |
Gas sensing by near-infrared tunable diode laser spectroscopy method |
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| CHEN Dong,LIU Wen-qing,KAN Rui-feng,WANG Min,ZHANG Yu-jun,LIU Jian-guo.Gas sensing by near-infrared tunable diode laser spectroscopy method[J].Optical Technique,2006,32(4):598-600. |
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| Authors: | CHEN Dong LIU Wen-qing KAN Rui-feng WANG Min ZHANG Yu-jun LIU Jian-guo |
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| Abstract: | Gas explosion is the main menace of coal mining industry. Accurate,real-time measurements of gas concentration and giving an alarm are effective way for gas disaster management. The application of near-infrared tunable diode laser spectroscopy in coal mine gas measurement was experimentally studied,the system used 1.65μm near-infrared DFB laser as light source,and through fibre optic to make the signal transmit,the system detection limit was less than 0.09% through combining wavelength modulation and second harmonic detection technology,the fast sample speed could attain 0.02s per measurement.The study results show that the technology has characteristic of real-time,successive,non-intrusive and multi-point measurements,and can meet the requirements of coal mine gas measurement. |
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| Keywords: | tunable diode laser spectroscopy(TDLAS) wavelength modulation spectroscopy gas |
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