Infrared and Laser Engineering, Volume. 52, Issue 1, 20220284(2023)

Wide-range multi-gas detection method based on wavelength modulation spectroscopy and direct absorption spectroscopy

Xiaohu Zhao1,2,3, Pengshuai Sun1, Zhirong Zhang1,4,5, Qianjin Wang1,4, Tao Pang1,5, Miao Sun3, and Feiyu Zhuang3
Author Affiliations
  • 1Anhui Provincial Key Laboratory of Photonic Devices and Material, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
  • 2Science Island Branch, Graduate School, University of Science and Technology of China, Hefei 230026, China
  • 3Anhui Province Key Laboratory of Simulation and Design for Electronic Information System, Hefei Normal University, Hefei 230601, China
  • 4School of Environment Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026, China
  • 5Key Lab of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
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    Figures & Tables(11)
    Flow chart of the gas concentration detection system
    Schematic of wide range multi-gas detection system
    Absorbance and 2f signal of 2.5% CH4
    Results of gases concentration detected by two methods and relative errors
    Measurement process and settling time of in wide range CH4 by the detection system
    Measurement result of CH4 in wide range by the detection system
    Measurement process and settling time of CO and C2H2 in wide range
    Measurement result of CO and C2H2 in wide range by the detection system. (a) CO; (b) C2H2
    Second harmonic signals of three kinds of gases. (a) CH4; (b) CO; (c) C2H2
    • Table 1. Detection index of multi gas detection system

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      Table 1. Detection index of multi gas detection system

      Gas speciesMeasuring rangeAllowable errorSettling time/s
      CH40.00-1.00%±0.10%< 60
      1.00%-40.00%±10% of true value
      40.00%-100.00%±10%
      C2H2(0-50)×10−6±2×10−6< 60
      (50-1000)×10−6±5% of true value
      CO(0-100)×10−6±4×10−6< 60
      (100-5000)×10−6±5% of true value
    • Table 2. Measurement result of CO and C2H2 in wide range by the detection system

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      Table 2. Measurement result of CO and C2H2 in wide range by the detection system

      Gas speciesMeasuring rangeMaximal relative errorLinear equationR2Settling time/s
      CO10×10−64.6%y=0.980 57x+1.153 32 0.999 7420
      20×10−6-5000×10−63.66%
      C2H210×10−6-50×10−63.4%y=0.994 05x−1.848 18 0.999 5814
      50×10−6-1000×10−64.997%
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    Xiaohu Zhao, Pengshuai Sun, Zhirong Zhang, Qianjin Wang, Tao Pang, Miao Sun, Feiyu Zhuang. Wide-range multi-gas detection method based on wavelength modulation spectroscopy and direct absorption spectroscopy[J]. Infrared and Laser Engineering, 2023, 52(1): 20220284

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    Paper Information

    Category: Lasers & Laser optics

    Received: Apr. 24, 2022

    Accepted: --

    Published Online: Feb. 9, 2023

    The Author Email:

    DOI:10.3788/IRLA20220284

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