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高压电器  2014 

光声光谱检测变压器油中气体的共振光声池研究

, PP. 42-47

Keywords: 共振光声池,光声光谱(PAS),响应特性,气体检测

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Abstract:

气体光声光谱技术是一种新型的微量气体检测技术,能很好地应用于变压器油中溶解气体检测。光声池是光声光谱监测系统中的核心部分,是表征系统灵敏度的重要因素。笔者模拟分析了气体光声信号分布及谐振腔几何尺寸与表征光声池性能的特性参数的量化关系,设计制作了两个不同几何结构参数的共振光声池,实验研究了光声池响应特性,实验结果比较得出谐振腔长120mm、半径3mm的不锈钢光声池表现出比较优越的气体响应性能,并对变压器油中溶解的主要特征气体C2H2进行了光声探测。理论与实验结果为气体光声光谱在线监测系统的完善及高灵敏度光声池的优化设计提供了技术支持与理论参考。

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