| 微弱气体光声光谱监测光声信号影响因素分析 |
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| 引用本文： | 陈伟根,刘冰洁,胡金星,周恒逸,李剑.微弱气体光声光谱监测光声信号影响因素分析[J].重庆大学学报(自然科学版),2011,34(2):7-13. |
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| 作者姓名： | 陈伟根 刘冰洁 胡金星 周恒逸 李剑 |
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| 作者单位： | 重庆大学输配电装备及系统安全与新技术国家重点实验室;重庆市电力公司城区供电局; |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目(2009AA04Z416) |
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| 摘 要： | 气体光声光谱检测技术灵敏度高,不消耗被测气体,能很好地应用于变压器油中溶解微弱气体的在线监测。检测中,微音器输出的光声信号是进行气体浓度分析的唯一特征量。基于光声光谱技术的基本原理,构建了一种便携式、可调谐的光声光谱装置。在分析气体光声信号激发机理的基础上,结合实验深入探讨了影响气体光声信号的多种因素,获得气体光声信号与压力、温度、激光功率、气体浓度、背景气体、斩波频率及谐振频率漂移之间的关系曲线,理论及实验结果为进一步完善油中气体光声光谱在线监测系统提供了技术参照和支撑。
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| 关 键 词： | 微弱气体 光声光谱 气体检测 影响因素 |
| 收稿时间： | 2010/7/30 0:00:00 |
Influential factors analysis on photoacoustic signal of photoacoustic spectroscopy monitoring trace gases |
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| CHEN Wei-gen,LIU Bing-jie,HU Jin-xing,ZHOU Heng-yi and LI Jian.Influential factors analysis on photoacoustic signal of photoacoustic spectroscopy monitoring trace gases[J].Journal of Chongqing University(Natural Science Edition),2011,34(2):7-13. |
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| Authors: | CHEN Wei-gen LIU Bing-jie HU Jin-xing ZHOU Heng-yi and LI Jian |
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| Institution: | CHEN Wei-gen1,LIU Bing-jie1,HU Jin-xing2,ZHOU Heng-yi1,LI Jian1(1.State Key Laboratory of Power Transmission Equipment &System Security and New Technology,Chongqing University,Chongqing 400044,P.R.China,2.Chengqu Power Supply Bureau,Chongqing Electric Power Company,Chongqing 400014,P.R.China) |
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| Abstract: | Photoacoustic spectroscopy(PAS) is a highly sensitive gas analyzing method without the shortcoming of gas consumption,which can be used in transformer oil trace gases dissolved in on line monitoring.The photoacoustic signal is detected with a microphone,which is the only feature in gas concentration analysis.A portable and tunable experimental setup has been developed based on the photoacoustic spectroscopy fundamental.Through the photoacoustic signal stimulate mechanism analysis,this paper thoroughly discu... |
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| Keywords: | trace gases photoacoustic spectroscopy gas detection influence factors |
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