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.
出处
《仪表技术与传感器》
CSCD
北大核心
2008年第9期9-10,20,共3页
Instrument Technique and Sensor
关键词
瓦斯爆炸
甲烷
光纤环形衰荡腔
衰荡时间
相位检测
gas explosion
methane
fiber-loop ring-down cavity
ring-down time
phase detection
