基于光纤环形衰荡腔的甲烷传感研究  

Methane Sensing Research Based on Fiberloop Ring-down Cavity

作　　者：魏冬明[1] 

机构地区：[1]燕山大学,河北秦皇岛066004

出　　处：《仪表技术与传感器》2008年第9期9-10,20,共3页Instrument Technique and Sensor

摘　　要：提出一种基于腔衰荡光谱技术的新型光纤甲烷传感方法,与传统的甲烷传感方式相比,它可以通过测量信号的相位移动来测量气体的浓度。实验中采用了环形的光纤结构,避免了小型渐变折射率透镜构成的微型气室产生的二次噪声,提高了系统的灵敏度。结果表明,该系统可以应用于低浓度气体的在线检测。A novel methane sensing method based on cavity ring-down spectroscopy （CRDS） was proposed. Compared with the traditional methane sensing method, this scheme measured methane concentration by measuring phase shift of the experiment signal. In the experiment, the fiber-loop was used, which can reduce the second noise of GRIN cell and improve the system sensibility. The experiment results show that the system can be used in online measurement of low concentration gas.

关 键 词：瓦斯爆炸 甲烷 光纤环形衰荡腔 衰荡时间 相位检测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]