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Frequency-Domain Detection for Frequency-Division Multiplexing QEPAS

文献类型：期刊论文

作者Chen, Xiang2,3; Liu, Hao1,3; Hu, Mai1,3; Yao, Lu3; Xu, Zhenyu3; Deng, Hao3; Kan, Ruifeng3
刊名SENSORS
出版日期2022-06-01
卷号22
关键词photoacoustic spectroscopy quartz tuning fork frequency-division multiplexing frequency-domain signal
DOI10.3390/s22114030
通讯作者Kan, Ruifeng(kanruifeng@aiofm.ac.cn)
英文摘要To achieve multi-gas measurements of quartz-enhanced photoacoustic spectroscopy (QEPAS) sensors under a frequency-division multiplexing mode with a narrow modulation frequency interval, we report a frequency-domain detection method. A CH4 absorption line at 1653.72 nm and a CO2 absorption line at 2004.02 nm were investigated in this experiment. A modulation frequency interval of as narrow as 0.6 Hz for CH4 and CO2 detection was achieved. Frequency-domain 2f signals were obtained with a resolution of 0.125 Hz using a real-time frequency analyzer. With the multiple linear regressions of the frequency-domain 2f signals of various gas mixtures, small deviations within 2.5% and good linear relationships for gas detection were observed under the frequency-division multiplexing mode. Detection limits of 0.6 ppm for CH4 and 2.9 ppm for CO2 were simultaneously obtained. With the 0.6-Hz interval, the amplitudes of QEPAS signals will increase substantially since the modulation frequencies are closer to the resonant frequency of a QTF. Furthermore, the frequency-domain detection method with a narrow interval can realize precise gas measurements of more species with more lasers operating under the frequency-division multiplexing mode. Additionally, this method, with a narrow interval of modulation frequencies, can also realize frequency-division multiplexing detection for QEPAS sensors under low pressure despite the ultra-narrow bandwidth of the QTF.
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22020502] ; Foundation from the Key Laboratory of Environmental Optics and Technology[2005DP173065-2021-03] ; National Key Research and Development Project[2019YFB2006003]
WOS研究方向Chemistry ; Engineering ; Instruments & Instrumentation
语种英语
WOS记录号WOS:000809080200001
出版者MDPI
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Foundation from the Key Laboratory of Environmental Optics and Technology ; National Key Research and Development Project
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/131201]  
专题中国科学院合肥物质科学研究院
通讯作者Kan, Ruifeng
作者单位1.Univ Sci & Technol China, Hefei 230026, Peoples R China
2.Jinlin Inst Technol, Nanjing 211169, Peoples R China
3.Chinese Acad Sci, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Xiang,Liu, Hao,Hu, Mai,et al. Frequency-Domain Detection for Frequency-Division Multiplexing QEPAS[J]. SENSORS,2022,22.
APA Chen, Xiang.,Liu, Hao.,Hu, Mai.,Yao, Lu.,Xu, Zhenyu.,...&Kan, Ruifeng.(2022).Frequency-Domain Detection for Frequency-Division Multiplexing QEPAS.SENSORS,22.
MLA Chen, Xiang,et al."Frequency-Domain Detection for Frequency-Division Multiplexing QEPAS".SENSORS 22(2022).

入库方式： OAI收割

来源：合肥物质科学研究院

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