分布式多点激光甲烷检测系统研究

发布时间：2018-05-26 16:42

本文选题：激光甲烷检测 + 分布式多点激光检测　；参考：《工矿自动化》2017年10期

【摘要】：针对传统甲烷检测系统存在的易受环境影响、检测精度低、稳定性差等问题,基于可调谐半导体激光吸收光谱技术和空分复用技术,设计了一种分布式多点激光甲烷检测系统。该系统采用波长1 653.7nm的分布式反馈半导体激光器作为光源;利用谐波检测法得到二次谐波和一次谐波信号幅值比来反演甲烷浓度;采用1分8光分束器,并结合参考气室实现多个测点甲烷浓度的实时检测。在实验室环境下对该系统进行了测试,结果表明该系统测量准确性高、稳定性好,可实现10km范围内测点的有效覆盖,在2.00%~85.0%甲烷浓度范围内,系统测量误差小于2%。
[Abstract]:A distributed multi-point laser methane detection system is designed based on tunable semiconductor laser absorption spectroscopy and space-division multiplexing technology to solve the problems of the traditional methane detection system which is easy to be affected by environment low detection accuracy and poor stability. The system uses a distributed feedback semiconductor laser with wavelength of 1 653.7nm as the light source, uses the harmonic detection method to obtain the amplitude-to-value ratio of the second harmonic and the first harmonic signal to retrieve the methane concentration, and uses a 1 sub-8 beam splitter. The real-time detection of methane concentration at multiple measuring points is realized with reference gas chamber. The system is tested in laboratory environment. The results show that the system has high accuracy and good stability, and can effectively cover the measuring points in the range of 10km. In the range of 2.00% 85.0% methane concentration, the system measurement error is less than 2%.
【作者单位】：中煤科工集团重庆研究院有限公司;瓦斯灾害监控与应急技术国家重点实验室;
【基金】：国家重点研发计划专项资助项目(2016YFC0801405)
【分类号】：TD712

【相似文献】