光声学和光纤干扰仪光谱方法,用于同时检测多个痕迹气体
Huiting Huan1, Jialiang Sun1, Lixian Liu1
1School of Optoelectronic Engineering, Hangzhou Institute of Technology and State, Key Laboratory of Electromechanical lntegrated Manufacturing of High-performance Electronic Equipment, Xidian University, Xi'an 710071, China.
Analytical chemistry
|June 27, 2025
概括
这项研究引入了一种新的传感器系统,用于同时检测变压器油中溶解的气体和水蒸气. 创新的设计通过克服气体分析中的水蒸气干扰来提高变压器健康状况监测的准确性.
科学领域:
- 电气工程 电气工程
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 变压器油中溶解的气体是变压器运行条件和故障类型的关键指标.
- 环境水蒸气显著影响光声学溶解气体分析系统的准确性.
- 同时检测溶解的气体和水对于可靠的变压器健康监测至关重要.
研究的目的:
- 开发一种高灵敏度,多组件的气体传感系统,能够同时检测溶解气体和水蒸气.
- 为了应对水蒸气干扰在光声气体分析中的挑战.
- 为了提高变压器状态监控的准确性和可靠性.
主要方法:
- 设计并实施了一种新的传感系统,该系统结合了差异光声细胞和光纤水蒸气传感器.
- 通过模拟和实验分析光声细胞的声学特性,利用纵向模式频率差异.
- 一个带有自组装微球的光纤Fabry-Perot干扰仪被开发用于敏感的水蒸气检测.
主要成果:
- 开发的双模式传感器实现了CO的1.15ppb,C2H2的241.07ppb和CH4的367.32ppb的检测极限.
- 水光学传感器在检测H2O时表现出高灵敏度,大约为112 pm/%.
- 该系统为测量气体实现了10^-8到10^-9cm^-1·W·Hz^-1/2等级的正常化等效噪声吸收系数.
结论:
- 开发的双模式传感系统能够有效地同时检测溶解气体和水蒸气.
- 该系统提供高灵敏度和低检测极限,对于精确的变压器状态评估至关重要.
- 这项技术提供了一种强大的解决方案,可以在光声学气体分析中克服水蒸气干扰.
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