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DOI	10.7498/aps.73.20231224
	Method of measuring atmospheric CO2 based onFabry-Perot interferometer
	Song, Wang; Chuang, Zhou; Su -Wen, Li; Fu -Sheng, Mou
发表日期	2024
ISSN	1000-3290
起始页码	73
结束页码	2
卷号	73 期号:2
英文摘要	CO2 is one of the main greenhouse gases. Its emission and accumulation lead to the strengthening of thegreenhouse effect, which in turn causes global climate change. Therefore, it is of great significance to obtain thechange of CO2 concentration in the atmospheric environment for the study of climate change. In order to meetthe requirements of low cost, fast, on-line and accurate measurement of CO2 in atmospheric environment, a CO2gas concentration measurement system based on Fabry-Perot interferometer is built in this work. The thermalradiation source based on micro-electro-mechanical system (MEMS) technology is used as a light source of theFabry-Perot interferometer system, and the transmission optical path is designed to replace the commonrefractive optical path. By electrostatically controlling the distance between the two lenses and changing theinterference spectrum, the interference peak adjustment of the center wavelength of the 10 nm step is realized,and the absorption spectrum is obtained by scanning. Based on the principle of differential optical absorptionspectroscopy, the concentration of CO2 gas is obtained, and the real-time on-line monitoring of CO2concentration is realized. Using the sample gas calibration system and the commercial photoacousticspectroscopy multi-gas analyzer to verify the system, the results show that the detection limit of the system is1.09x10-6, the detection accuracy is +/- 1.13x10-6, and the measurement error is less than 1%. Real-time onlinemonitoring of atmospheric CO2 has been conducted in Huaibei, a coal city. A comparative observationalexperiment is performed between this system and a commercial photoacoustic spectroscopy multi-gas analyzer.The two systems show consistent trends in measuring CO2 variations, with a correlation coefficient of R=0.92.It shows that the Fabry-Perot interferometer system can meet the requirement of rapid, convenient and highprecision measurement of CO2 concentration in the environment
英文关键词	carbon dioxide; Fabry-Perot interferometer; thermal radiation source; photoacoustic spectrummulti-gas analyzer
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:001178133500016
来源期刊	ACTA PHYSICA SINICA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290203
作者单位	Huaibei Normal University
推荐引用方式 GB/T 7714	Song, Wang,Chuang, Zhou,Su -Wen, Li,et al. Method of measuring atmospheric CO2 based onFabry-Perot interferometer[J],2024,73(2).
APA	Song, Wang,Chuang, Zhou,Su -Wen, Li,&Fu -Sheng, Mou.(2024).Method of measuring atmospheric CO2 based onFabry-Perot interferometer.ACTA PHYSICA SINICA,73(2).
MLA	Song, Wang,et al."Method of measuring atmospheric CO2 based onFabry-Perot interferometer".ACTA PHYSICA SINICA 73.2(2024).