| 窄带吸收光谱扫描技术在气体定量检测中的应用 |
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| 引用本文： | 丁晖,梁建奇,崔俊红,吴相楠,李仙丽.窄带吸收光谱扫描技术在气体定量检测中的应用[J].光谱学与光谱分析,2010,30(3). |
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| 作者姓名： | 丁晖 梁建奇 崔俊红 吴相楠 李仙丽 |
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| 作者单位： | 1. 西安交通大学电力设备电气绝缘国家重点实验室,陕西,西安,710049
2. 中国人民解放军93987部队,青海,西宁,810007 |
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| 基金项目： | 国家自然科学基金项目(60772016);;电力设备电气绝缘国家重点实验室(EIPE09111)资助项目 |
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| 摘 要： | 提出一种基于窄带气体吸收光谱扫描技术的气体定量测量系统。利用可调谐光纤滤波器(TOF)输出的窄带光作为探测光,结合波长调制技术,克服不同气体间的交叉敏感,提高了对环境中待测气体测量的选择性。为克服TOF非线性特性对测量结果的影响,提高系统运行稳定性,系统以光纤光栅反射光谱作为参考波长,实现了TOF透射光波长调制范围以及调制中心的稳定控制。为提高系统测试灵敏度,开发了以同步累积器为核心的微弱信号检测电路,实现了系统微弱响应信号的高灵敏度提取。以乙炔气体为实验气体,通过实验证明系统响应与输入乙炔气体浓度之间具有良好的线性关系。当信噪比为3时,系统最低检测限为5×10-6。
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| 关 键 词： | 吸收光谱 波长调制 光纤光栅 可调谐光纤滤波器 |
Application of Near-Infrared Absorption Spectrum Scanning Techniques in Gas Quantitative Measurement |
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| DING Hui,LIANG Jian-qi,CUI Jun-hong,WU Xiang-nan,LI Xian-li.Application of Near-Infrared Absorption Spectrum Scanning Techniques in Gas Quantitative Measurement[J].Spectroscopy and Spectral Analysis,2010,30(3). |
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| Authors: | DING Hui LIANG Jian-qi CUI Jun-hong WU Xiang-nan LI Xian-li |
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| Institution: | DING Hui1,LIANG Jian-qi2,CUI Jun-hong1,WU Xiang-nan1,LI Xian-li11.State Key Laboratory of Electrical Insulation , Power Equipment,Xi'an Jiaotong University,Xi'an 710049,China2.Unit 93987 of People's Liberation Army,Xining 810007,China |
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| Abstract: | A practical gas sensing system utilizing absorption spectrum scanning techniques was developed.Using the narrow-band transmission of a fiber tunable filter(TOF) and wavelength modulation technique,the so-called cross-sensing effects of the traditional spectrum absorption based gas sensor were reduced effectively and thus the target gas was detected sensitively and selectively.In order to reduce the effects of nonlinearity of TOF on the measurement results and improve the system stability in operation,the re... |
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| Keywords: | Absorption spectrum Wavelength modulation Fiber Bragg gratings (FBGs) Tunable fiber filter |
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