| 光声光谱式甲烷气体传感器的研究 |
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| 引用本文： | 付华,翟波.光声光谱式甲烷气体传感器的研究[J].传感器与微系统,2010,29(9). |
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| 作者姓名： | 付华 翟波 |
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| 作者单位： | 辽宁工程技术大学电气与控制工程学院; |
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| 基金项目： | 国家自然科学基金资助项目，辽宁省优秀人才基金资助项目 |
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| 摘 要： | 根据物体在周期性变化的光的照射下会产生声音信号的现象,提出了一种基于光声光谱理论的甲烷气体检测的方法.根据比尔-朗伯定律,经过调制的平行光束通过不同体积分数的甲烷气体时,其光强将会发生不同程度的衰减,若衰减后的光束进入光声腔,将会在光声腔内产生光声信号,通过测定光声信号的幅值来达到检测甲烷气体体积分数的目的.此方法相对于通常的光谱法,增加了把热能转换为声信号的过程,具有极高的精确性和可靠性,为设计高灵敏度瓦斯传感器的研究提供理论依据.
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| 关 键 词： | 光声光谱 甲烷 光声腔 光声信号 |
Study on methane sensor based on photoacoustic spectrum |
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| FU Hua,ZHAI Bo.Study on methane sensor based on photoacoustic spectrum[J].Transducer and Microsystem Technology,2010,29(9). |
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| Authors: | FU Hua ZHAI Bo |
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| Affiliation: | FU Hua,ZHAI Bo (School of Electrical and Control Engineering,Liaoning Technical University,Huludao 125105,China) |
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| Abstract: | According to the phenomenon that the objects will generate sound signal under the irradiation of periodic light,a detection method of methane gas based on photoacoustic spectroscopy is proposed.According to Beer-Lambert law,when the modulated parallel beams is passing different volume fraction of methane gas,the light intensity will become attenuation in different degrees.If the decayed light go into a photoacoustic cavity,photoacoustic signal will be generated in the cavity.By measuring the amplitude of ph... |
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| Keywords: | photoacoustic spectrum methane photoacoustic cavity photoacoustic signal |
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