物理学报Issue(23)：234204-1-234204-7,7.DOI:10.7498/aps.62.234204
基于可调谐半导体激光吸收光谱技术的气体浓度测量温度影响修正方法研究
Study on the temperature modified method for monitoring gas concentrations with tunable diode laser absorption spectroscopy
摘要
Abstract
Tunable diode laser absorption spectroscopy (TDLAS) is often used to detect gas concentrations in many fields. But because of the variation of ambient temperature, the measured harmonic signal amplitudes are affected and may lead to the monitoring errors. The impact of temperature on the measurement as well as the temperature compensation method is emphasized. So in order to modify the inversion results and adapt industrial measurement, combustion diagnostics, the numerical fitting empirical modified equation and theoretical modified equation from HITRAN database are discussed and compared in this paper. In experiment, the 21%oxygen as the safety monitoring gas and absorption wavelength at 760.77 nm are employed. Meanwhile, the first harmonic signals are also used to decrease the laser intensity fluctuations. We thus obtained the unmodified and modified results with the tube furnace in the temperature range 300-900 K (interval 50 K). Experimental results show that these two modified methods have some effective influence on the temperature changes and can be applied to gas monitoring correction to improve the accuracy and feasibility of the TDLAS technology. In addition, the methods also provide evidence for the real-time gas monitoring in the application of combustion diagnosis.关键词
可调谐二极管激光吸收光谱(TDLAS)/温度修正/经验公式/理论公式Key words
tunable diode laser absorption spectroscopy/temperature compensation/empirical equation/theoretical equation引用本文复制引用
张志荣,吴边,夏滑,庞涛,王高旋,孙鹏帅,董凤忠,王煜..基于可调谐半导体激光吸收光谱技术的气体浓度测量温度影响修正方法研究[J].物理学报,2013,(23):234204-1-234204-7,7.基金项目
国家自然科学基金青年科学基金(批准号:11204320)资助的课题.*Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No.11204320) （批准号:11204320）
