基于可调谐半导体激光吸收光谱技术的甲烷遥测方法的研究  

CH_4 gas remote sensing by a transceiver system based on TDLAS technology

作　　者：姜治深[1] 王飞[1] 许婷[1] 邢大伟[1] 姚华[1] 严建华[1] 岑可法[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《能源工程》2012年第3期1-5,共5页Energy Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB219802);浙江省自然科学基金资助项目(R1100395);高等学校学科创新引智计划资助项目(B08026)

摘　　要：介绍了一种基于TDLAS技术的望远镜收发系统的设计原理,通过对吸收池内标准浓度CH4的测量,标定了测量的准确性。在此基础上,对40 m的开放光程下CH4进行不同工况测量,验证了系统具有良好的时间响应性。系统的最小可探测极限约为5.48×10-5m/m。研究证明,该系统可以满足工业气体的在线监测需求。此外,该系统还可以方便用于远程监测H2S、CO、NH3等危险性气体的泄露。A telescope transceiver system design principle based on TDLAS technology was described.Through the measurements of CH4 concentration in the absorption cell,the accuracy of the measurement was calibrated.On this basis,by detecting CH4 concentration of different work conditions in a 40m-long open path,it was verified that the system had a good time responsiveness.The minimum detectable limit of the system was about 5.48×10-5 m/m.Studies showed that the system could meet the demand of on-line detection of industrial gases.In addition,the system could be also used to detect the other hazardous gas concentration,such as H2S,CO,and NH3.

关 键 词：可调谐半导体激光吸收光谱(tdlas) 遥测望远镜收发系统 开放式长光程光路 CH4浓度实时测量 

分 类 号：X752[环境科学与工程—环境工程]