Study on high temperature oxygen measure method with temperature correction using laser absorption spectroscopy

Yanwei Gao; Yujun Zhang

doi:10.1117/12.2639038

29 April 2022 Study on high temperature oxygen measure method with temperature correction using laser absorption spectroscopy

Yanwei Gao, Yujun Zhang

Author Affiliations +

Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 122550F (2022) https://doi.org/10.1117/12.2639038
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China

Abstract

Oxygen concentration is of great significance for Industry and environmental protection. In this paper, an oxygen measurement system based on laser absorption spectrum combined with temperature compensation algorithm is designed. Firstly, the laser spectral characteristics of oxygen at different temperatures and the intensity characteristics of absorption line based on HITRAN data are studied. The appropriate absorption line is selected for concentration measurement. The corresponding relationship between 2F signal and concentration is studied. The temperature compensation algorithm is designed to improve the measurement accuracy at different temperatures, and the measurement error is increased from 70% to 3.3%. The designed measurement system is experimentally studied, experimental results show that the minimum detection limit is about 0.035%, and the range drift is less than ± 4% FS. Finally, the designed oxygen analyzer is used to measure the oxygen concentration in the arsenic containing gold roasting kiln. The measurement results show that the developed oxygen analyzer can stably and accurately measure the oxygen content in the roasting furnace long-term.

Citation Download Citation

Yanwei Gao and Yujun Zhang "Study on high temperature oxygen measure method with temperature correction using laser absorption spectroscopy", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 122550F (29 April 2022); https://doi.org/10.1117/12.2639038

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