正交锁相放大器在红外甲烷探测系统的设计与仿真
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摘要
本文详细介绍了气体光谱吸收原理以及正交锁相放大器的基础理论,基于simulink对红外甲烷气体探测系统进行仿真。模型能较为准确地反映红外甲烷探测系统中光源调制、甲烷气体吸收以及二次谐波提取的过程,分析了甲烷浓度参数与二次谐波幅值之间的关系。对TDLAS系统的硬件开发有一定指导意义。
In this paper, the principle of gas spectral absorption and the basic theory of orthogonal phase-locked amplifier are introduced in detail. The infrared methane gas detection system is simulated based on simulink. The model can accurately reflect the process of light source modulation, methane gas absorption and second harmonic extraction in infrared methane detection system. The relationship between methane concentration parameters and second harmonic amplitude is analyzed. It has certain guiding significance to the hardware development of TDLAS system.
In this paper, the principle of gas spectral absorption and the basic theory of orthogonal phase-locked amplifier are introduced in detail. The infrared methane gas detection system is simulated based on simulink. The model can accurately reflect the process of light source modulation, methane gas absorption and second harmonic extraction in infrared methane detection system. The relationship between methane concentration parameters and second harmonic amplitude is analyzed. It has certain guiding significance to the hardware development of TDLAS system.
引文
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[2]李胜,肖兵,李坤颖.基于TDLAS气体测量系统的仿真与分析[J].现代科学仪器,2007,2007(2):52-55.
[3]谢科.基于可调谐激光二极管吸收光谱技术的CO2气体检测系统的研究[D].重庆大学,2008.
[4]伍昂.TDLAS谐波信号线型计算方法的研究[D].昆明理工大学,2011.
[5]高昊.基于可调谐激光检测技术的甲烷传感器[J].煤矿安全,2013,44(6):94-95.
[6]潘雅楠.基于光谱吸收激光式甲烷传感器[J].煤矿安全,2013,44(1):99-101.
[7]刘昱峰,王彪,杨凯,等.TDLAS检测技术气体吸收过程的仿真研究[J].激光杂志,2017,38(3):37-40.
[8]蔡满军,于彬,赵晓东.基于正交锁相放大器的微弱应变信号检测系统[J].仪表技术与传感器,2017(4):67-72.
[9]Hanson R, Jeffries J. Advances in Laser-based Sensors for Propulsion Systems[J]. Aiaa Journal, 2013.
[10]Tservistas M, K?neke R, Comte A, et al. Oxygen monitoring in supercritical carbon dioxide using afibreopticsensor[J].Enzyme&Microbial Technology, 2001, 28(7):637-641.