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Simultaneous detection of H2S and CO based on cantilever enhanced photoacoustic spectroscopy
ID：640 View Protection：ATTENDEE Updated Time：2022-05-25 09:03:35 Hits：621 Poster Presentation

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Abstract
Cantilever beam enhanced photoacoustic spectroscopy gas detection technology has attracted extensive attention due to its high detection sensitivity, but the quantitative detection of multi-component in mixed gas has not been carried out yet. In this paper, two infrared laser beams with central wavelengths of 1578.13nm and 1568.04nm are coupled into the same optical fiber with a wave combination, and H2S and CO are quantitatively detected in binary mixture gas H2S/N2, CO/N2 and ternary mixture gas H2S/CO/N2. Based on the analysis of the cross interference mechanism of infrared absorption S lines, a quantitative detection method of H2S and CO in H2S/CO/N2 termist mixture was proposed, and the influence of background gas types on PAS signal intensity was analyzed. The results show that the maximum SNR values of H2S and CO gases both appear at 45Hz in the range of 20-300 hz. In mixed gas, there is a linear relationship between the pure PAS signal value and gas concentration. For the terrestrial-mixed gas, the total PAS signal can be regarded as the linear superposition of the respective PAS signals of H2S and CO, and H2S needs to be quantified first, and then CO. The results provide an idea for multi-component quantitative detection of fault gas in power equipment.
 
Keywords
cantilever beam photoacoustic spectroscopy; Combined wave; Multicomponent quantitative detection; Cross interference; Background gas
Speaker
LiaoJianping
高级工程师 Maintenance & Test Center of EHV Power Transmission

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Important Date

  • Conference Date

    May 27

    2022

    to

    May 29

    2022

  • Feb 28 2022

    Draft paper submission deadline

  • May 29 2022

    Registration deadline

  • Jun 22 2022

    Contribution Submission Deadline

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IEEE Beijing Section
China Electrotechnical Society
Southeast University
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IEEE Industry Applications Society
IEEE Nanjing Section
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