摘要
针对应用可调谐半导体激光吸收光谱技术检测气体浓度过程中,待测气体特征吸收谱线选择影响检测系统性能及特征吸收谱线强度受温度影响的问题,基于HITRAN数据库开展了背景气体干扰下氢气特征吸收谱线选择及特征吸收谱线的温度依赖机制研究。结果表明:温度在200~300 K范围变化时,H_(2)吸光度曲线的峰值和半峰全宽均随着温度升高而减小,在峰值和半峰全宽的双重作用下,积分吸光度大幅下降;H_(2)总体配分函数Q(T)随温度升高线性增长且其不同温度下的比值rQ在谱线强度影响因素中权重最大,最终导致特征吸收谱线强度随温度升高递减。研究为基于可调谐半导体激光吸收光谱技术的氢气传感器温度补偿提供理论基础。
In the process of applying the tunable diode laser absorption spectroscopy to detect the gas concentration,the selection of the characteristic absorption spectral lines of the gas to be measured affected the system sensitivity and the characteristic absorption spectral lines were affected by the tem-perature.In this paper,a study was conducted on the selection of the characteristic absorption spectral lines of hydrogen and the temperature-dependent mechanism of the characteristic absorption spectral lines.The results showed that Ip and FWHM of the H_(2) absorbance curve decreased with the increase of temperature(200~300 K).The integrated absorbance decreased significantly under the dual effect of the Ip and FWHM;the Q(T)of H_(2) increased linearly with the increase of temperature and rQ had the greatest weight among the factors influencing the intensity of the spectral lines,which finally led to the decrease of intensity with the increase of temperature.This research could provide a theoretical basis for temperature compensation of hydrogen sensors based on tunable diode laser absorption spectroscopy.
作者
吕妍
孙伟通
冯其栋
陈淑贤
王云
王迪
李栋
李玉爽
LYU Yan;SUN Weitong;FENG Qidong;CHEN Shuxian;WANG Yun;WANG Di;LI Dong;LI Yushuang(School of Physics and Electronic Engineering,Northeast Petroleum University,Daqing Heilongji-ang 163318,CHN;Hangzhou Hangran Engineering Technology Co,Ltd.,Hangzhou 310008,CHN;Heilongjiang Provincial Key Laboratory of Thermal Utilization and Disaster Reduction of New Energy in Cold Regions,Daqing Heilongjiang 163318,CHN)
出处
《光电子技术》
2024年第4期338-344,共7页
Optoelectronic Technology
基金
黑龙江省“双一流”学科协同创新成果项目(LJGXCG2023-108)
黑龙江省“揭榜挂帅”科技攻关项目(2023ZXJ06A04)
黑龙江省大学生创新创业训练计划项目(S202310220159)
国家资助博士后研究人员计划(GZB20240137)
国家市场监督管理总局科技计划项目(2023MK163)。
关键词
氢泄漏检测
可调谐半导体激光吸收光谱
特征谱线选择
温度
谱线强度
hydrogen leakage detection
TDLAS
characteristic spectral line selection
tempera-ture
spectral line intensity
