中国激光, 2006, 33 (3): 405, 网络出版: 2006-04-20   

激光遥测甲烷气体最低可探测浓度

Minimum Detection Limit for Methane with Single Laser Remote Sensing
作者单位
1 长治学院电子信息与物理系, 山西 长治 046011
2 山西大学物理电子工程学院,山西 太原 030006
摘要
对一种使用单一激光源遥感检测甲烷方案的最低可探测的路径-积分浓度进行了理论分析和实验研究,该方案主要采用了频率调制及谐波探测技术。通过理论计算得出了最低可探测甲烷的路径-积分浓度大约为8.7×10-8 m。实验中测得该探测系统的探测灵敏度为8.43×10-6 m/mV,甲烷最低可探测路径-积分浓度为4.2×10-7 m。结果表明该探测系统具有较高的探测灵敏度,完全满足对矿井瓦斯的实时监测要求。
Abstract
This article carried theoretical analysis and experimental research on the scheme of remote sensing the minimum detection limit concentration for methane gas using a single laser source. In this project, the frequency-modulation (FM) and harmonic detection (HD) technologies are adopted. It is obtained through the theoretical calculation that the minimum detection limit concentration for methane gas was about 8.7×10-8 m. Simultaneously the experimental sensitivity of the detection system and the minimum measurable path-integrated concentration were measured to be 8.43×10-6 m/mV and 4.2×10-7 m respectively. This results show that the remote sensing system owns a super-high sensitivity and it can satisfy the need of monitoring methane in the coal mine.

王铁云, 张雷, 董磊, 窦海鹏, 贾锁堂. 激光遥测甲烷气体最低可探测浓度[J]. 中国激光, 2006, 33(3): 405. 王铁云, 张雷, 董磊, 窦海鹏, 贾锁堂. Minimum Detection Limit for Methane with Single Laser Remote Sensing[J]. Chinese Journal of Lasers, 2006, 33(3): 405.

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