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LIN Weihao, GAO Zhihui, YANG Yong, HUANG Bichang, HE Wei. NO2 detection based on laser spectrum differential method[J]. LASER TECHNOLOGY, 2014, 38(6): 835-838. DOI: 10.7510/jgjs.issn.1001-3806.2014.06.024
Citation: LIN Weihao, GAO Zhihui, YANG Yong, HUANG Bichang, HE Wei. NO2 detection based on laser spectrum differential method[J]. LASER TECHNOLOGY, 2014, 38(6): 835-838. DOI: 10.7510/jgjs.issn.1001-3806.2014.06.024
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NO2 detection based on laser spectrum differential method

  • College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China

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  • Received Date: December 02, 2013
  • Revised Date: December 19, 2013
  • Published Date: November 24, 2014
    Graphical Abstract
    • Abstract
  • In order to analyze the relationship between spectra and gas volume fractions of NO2 which is one of the main pollution gases, laser whose center wavelength was located in the peak of NO2 absorption was chosen as light source and a gas spectra detection system was built. The spectrum was analyzed according to Lambert-Beer law, using time-sharing differential method, comparing with authoritative database and considering the spectral area and other factors. The data were fitted by the least squares method and the relationship curve between NO2 absorption spectra and NO2 volume fractions was obtained. The data of volume fractions was inversed and the error was analyzed. The experimental results agree well with the theoretical analysis. The research value and the application value of the experimental system are verified.
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    • References (10)
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