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Simultaneous detection of H2S and CO based on cantilever enhanced photoacoustic spectroscopy
编号：640 访问权限：仅限参会人 更新：2022-05-25 09:03:35 浏览：338次 张贴报告

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摘要
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.
 
关键词
cantilever beam photoacoustic spectroscopy; Combined wave; Multicomponent quantitative detection; Cross interference; Background gas
报告人
LiaoJianping
高级工程师 Maintenance & Test Center of EHV Power Transmission

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重要日期

  • 会议日期

    05月27日

    2022

    至

    05月29日

    2022

  • 02月28日 2022

    初稿截稿日期

  • 05月29日 2022

    注册截止日期

  • 06月22日 2022

    报告提交截止日期

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