CH_4监测的反射式光纤传感方法研究  

Study on reflecting optical fiber sensing method for monitoring methane

作　　者：乔学光[1] 王佳[1] 贾振安[1] 赵大壮[1] 周红[1] 葛朋[1] 

机构地区：[1]西安石油大学光电油气测井与检测教育部重点实验室,陕西西安710065

出　　处：《光电子．激光》2009年第8期1016-1019,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60727004);国家"863"计划资助项目(2007AA03Z413)

摘　　要：根据CH4的光谱吸收特性,研究了一种基于比尔-朗伯定律的光纤CH4气体传感方法。采用1665nm的分布反馈式激光器(DFB-LD)光源,设计了一种带有环形器的反射式气室结构,实现了传感器小型化。实验结果表明,该方法可探测的最小CH4浓度约为10ppm,系统灵敏度较高且稳定性好。According to the near infrared spectral absorption of methane,an optical fiber methane sensing method is studied based on Lambert-Beer Law.A 1 665 nm DFB-LD is used as light source and a reflecting gas chamber with circulator is designed.to realize miniaturization.The experimental results show that the minimum detectable concentration for methane is about 10 ppm and the system has higher sensitivity and stability.

关 键 词：光纤传感 CH4检测 光谱吸收 分布反馈式激光器(DFB-LD) 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]