摘要
为测量甲烷气体浓度,设计基于光谱吸收原理测量气体浓度的传感系统。该系统利用光纤环衰荡腔代替传统的光学腔,使光源产生的光脉冲信号在光纤环中多次循环吸收,延长了吸收路径,从而大大缩短了气室长度。利用该系统对甲烷气体浓度进行测量,对测量结果的参数进行分析,并通过实验仿真得到甲烷气体浓度与光脉冲信号衰荡时间的关系。结果表明:实验结果与理论相符,证明所设计系统正确可靠。
This paper proposes a sensor system working on spectral absorption principle to measure the methane gas concentration. This system functions by replacing the conventional optical cavity with the fiber loop ring-down cavity to allow the light pulse signal produced by its light source to be absorbed by repeated circulation in the fiber loop, thus prolonging the absorption path of the signal and shortening the length of the air chamber. The viability of the system is verified by using the system to measure the con- centration of methane gas, analyze the measurement parameter, and define the relationship between the concentration of methane gas and the ring-down time of the light pulse signal by simulation experiments. The results demonstrate the reliability of the system above all thanks to the consistency between the exper- imental conclusion and theoretical research.
出处
《黑龙江科技学院学报》
CAS
2014年第4期405-409,共5页
Journal of Heilongjiang Institute of Science and Technology
基金
国家重大科学仪器设备开发专项项目(2012YQ150213)
关键词
瓦斯浓度测量
光纤环
光谱吸收
CRDS
methane concentrations measurement
optical fiber loop
spectral absorption
CRDS
