量子电子学报 ›› 2023, Vol. 40 ›› Issue (4): 597-605.doi: 10.3969/j.issn.1007-5461.2023.04.019

• 激光应用 • 上一篇    下一篇

基于光纤光声传感的油中溶解气体分析系统

陈珂1,马凤翔2,赵跃2,李辰溪1,安冉1,朱峰3,杭忱4   

  1. ( 1 国网安徽省电力有限公司电力科学研究院, 安徽 合肥 230601; 2 大连理工大学光电工程与仪器科学学院, 辽宁 大连 116024 )
  • 收稿日期:2021-10-13 修回日期:2021-11-05 出版日期:2023-07-28 发布日期:2023-07-28
  • 通讯作者: Email: chenke@dlut.edu.cn E-mail:chenke@dlut.edu.cn
  • 基金资助:
    国家电网有限公司科技项目 (52120520005C)

Analysis system of dissolved gas in oil based on optical fiber photoacoustic sensing

MA Fengxiang 1, ZHAO Yue 1, LI Chenxi 2, AN Ran 2, ZHU Feng 1, HANG Chen 1, CHEN Ke 2*   

  1. ( 1 Electric Power Research Institute of State Grid Anhui Electric Power Co., Ltd., Hefei 230601, China; 2 School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China )
  • Received:2021-10-13 Revised:2021-11-05 Published:2023-07-28 Online:2023-07-28
  • Supported by:
    Science and Technology Project of State Grid Corporation of China

摘要: 针对目前变压器油中溶解气体分析装置体积庞大、抗电磁干扰能力弱、油路复杂等问题, 将光纤传感和光声 光谱技术结合, 设计了一种基于光纤光声传感的变压器油中溶解气体分析系统, 用于检测油中溶解的微量乙炔气 体。通过谱线分析优化激光波长, 并设计了恒温激光驱动模块。采用两根单模光纤分别将泵浦激光和探测光传输 到光声探头中, 气体吸收光能产生的光声信号由法布里-珀罗干涉型悬臂梁探测, 并利用设计的光谱测量和信号处 理模块进行解调。实验结果表明, 设计的光纤光声传感系统可有效探测出变压器油中溶解的乙炔气体的光声信号, 检出限达到0.5 μL/L。

关键词: 光谱学, 油中溶解气体, 光声光谱, 变压器, 光纤传感

Abstract: In view of the problems existed in the traditional analysis devices of dissolved gas in transformer oil, such as large size, complicated oil circuit and susceptibility to electromagnetic interference, an analysis system based on optical fiber photoacoustic sensing is designed to detect trace acetylene gas dissolved in transformer oil. In the system, the laser wavelength is optimized through spectral line analysis, and a thermostatically controlled laser driving module is designed. The pump laser and probe light are transmitted into the photoacoustic sensor probe by two single-mode fibers. The photoacoustic signal generated by gas molecules absorbing the pump laser energy is detected by a Fabry- Perot interference cantilever, and then demodulated by a self-designed spectral measurement and signal processing module. Experimental results show that the designed optical fiber photoacoustic sensor system can effectively detect photoacoustic signal of acetylene gas dissolved in transformer oil, with a detection limit of 0.5 μL/L.

Key words: spectroscopy, dissolved gas in oil, photoacoustic spectroscopy, transformer, optical fiber sensing

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