光学式低浓度甲烷气体传感器的研究  

Optical Low-concentration Methane Gas Sensor

作　　者：王琢[1,2] 曹家年[1] 张可可 冯琳琳[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001 [2]东北林业大学机电工程学院,哈尔滨150040

出　　处：《光子学报》2011年第2期255-258,共4页Acta Photonica Sinica

摘　　要：针对0.5%VOL以下的低浓度甲烷气体,设计了一种基于近红外可调谐半导体激光吸收光谱的光学式甲烷气体传感器.调谐激光器扫描甲烷气体位于1 653.72 nm处的吸收谱线,采用一次谐波"峰-平比"对气体浓度进行测量.该方案能够有效地消除激光器光强波动和其它同类光功率波动所带来的影响,通过标定后的测试实验表明传感器测量准确度可达0.02%VOL.To the methane gas with the concentration lower than 0.5%VOL,an optical methane gas sensor was designed based on near infrared tunable diode laser absorption spectroscopy.The methane gas absorption spectroscopy of 1 653.72 nm was scanned by tunable laser,and the gas concentration was measured by using the first harmonic PAPR.The proposed can effectively eliminate the influences caused by light intensity fluctuation of the laser and other kindred light power fluctuations,and the test results show that the precision of this kind of sensor can be 0.02%VOL.

关 键 词：光学 甲烷 传感器 光谱吸收 

分 类 号：TP394.1[自动化与计算机技术—计算机应用技术] TH691.9[自动化与计算机技术—计算机科学与技术]