传感技术学报2017，Vol.30Issue(1)：31-34,4.DOI:10.3969/j.issn.1004-1699.2017.01.006
基于谐波检测的硫化氢气体传感器研究∗
Research on Hydrogen Sulfide Sensor Based on Harmonic Detection
摘要
Abstract
Based on the principle of the gas spectral absorption,this paper introduces a new method for the detection of H2 S( hydrogen sulfide) gas. The harmonic detection technique and the double optical path difference method are combined in this method. The double optical path difference method is adopted to improve the TDLAS ( Tunable Diode Laser Absorption Spectroscopy ) gas detection technology and eliminate the fundamental component. By locking the amplifier to reduce the measurement error in the weak signal detection system,the method can improve the detection ability for the second harmonics. This paper designs a system structure for H2 S sensor and establishes a mathematical model to simulate this system. The results show that the new method has a good effect in the low concentration H2 S detection. The simulation results verify the feasibility and correctness of the method.关键词
硫化氢气体传感器/光谱吸收/谐波检测/双光路差分Key words
H2 S gas sensor/spectral absorption/harmonic detection/double optical path difference分类
信息技术与安全科学引用本文复制引用
陈书旺,孙涛,唐东林..基于谐波检测的硫化氢气体传感器研究∗[J].传感技术学报,2017,30(1):31-34,4.基金项目
国家自然科学基金项目(41474121) （41474121）
