| 基于光谱吸收的煤矿瓦斯光纤传感气体的研究 |
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| 引用本文： | 周孟然,李振璧,朱宗玖.基于光谱吸收的煤矿瓦斯光纤传感气体的研究[J].煤矿安全,2007,38(8):6-9. |
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| 作者姓名： | 周孟然 李振璧 朱宗玖 |
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| 作者单位： | 安徽理工大学,电气工程系,淮南,232001 |
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| 基金项目： | 国家自然科学基金项目(50574005)，安徽省教育厅自然科学基金项目(2005KJ081) |
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| 摘 要： | 针对煤矿井下环境中的瓦斯气体,根据瓦斯气体分子在一定的波段对光有吸收特性,使光谱具有了瓦斯的特性,通过对煤矿瓦斯气体吸收光谱的分析,提出了一种光纤传感瓦斯气体及其系统。该系统以分布反馈式LD作为光源,采用InGaAs PIN作为光电探测器,通过理论分析得到二次谐波信号与气体的浓度和初始光强有关,因此检测二次谐波信号就可以获得气体浓度信息。实验表明该系统具有很高的灵敏度,传感系统的灵敏度达到10×10-6,精确度和稳定性等性能均可满足煤矿瓦斯气体检测要求。
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| 关 键 词： | 光纤传感 光谱吸收 煤矿瓦斯 二次谐波 |
| 文章编号： | 1003-496X（2007）08-0006-04 |
| 修稿时间： | 2007-03-13 |
Study on Coal Mine Gas Optical Fiber Sensor Based on Spectrum Absorption |
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| ZHOU Meng-ran,LI Zhen-bi,ZHU Zong-jiu.Study on Coal Mine Gas Optical Fiber Sensor Based on Spectrum Absorption[J].Safety in Coal Mines,2007,38(8):6-9. |
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| Authors: | ZHOU Meng-ran LI Zhen-bi ZHU Zong-jiu |
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| Abstract: | To the gas in coal mine underground environment,based on the optical absorption character of gas molecule in definite spectrum range,through the analysis of coal mine gas absorption spectrum,optical fiber sensing gas and system is suggested.The system's light-source is distributed feedback LD,and it's photo-detector is InGaAs PIN.Through theory analysis,we know that the second-harmonic signal relates to gas density and initial light intensity,and the gas density information can be achieved by the second-harmonic signal detection.The system has high sensitivity(10×10-6),and it's accuracy,stability can meet the requirement of coal mine gas detection. |
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| Keywords: | optical fiber spectrum absorption coal mine gas secondharmonic |
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