| 光纤式结冰传感器微弱信号检测电路的实现 |
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| 引用本文： | 刘治军,叶林,陈斌,葛俊锋,王立文.光纤式结冰传感器微弱信号检测电路的实现[J].仪表技术与传感器,2012(3):79-81. |
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| 作者姓名： | 刘治军 叶林 陈斌 葛俊锋 王立文 |
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| 作者单位： | 1. 华中科技大学控制科学与工程系,湖北武汉,430074
2. 中国民航大学特种设备研究基地,天津,300300 |
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| 基金项目： | 国家自然科学基金资助项目(60975030),国家自然科学基金与中国民用航空局联合资助项目(60939001) |
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| 摘 要： | 光纤式结冰传感器(FIS)中冰层对光强的调制作用微弱,且干扰源较多。通过比较常用的微弱信号检测方法(WSD),设计了由同步积分和相关检测相结合进行带宽压缩的高性能锁定放大器(LIA),并对该LIA抗干扰原理建立了数学模型。基于该LIA构建了高可靠性结冰探测系统(IDS)。结果表明锁定检测电路对FIS微弱信号能有效提取。
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| 关 键 词： | 光纤式结冰传感器 IDS系统 微弱信号 锁定放大器 |
Realization of Lock-in Detect Circuit on Weak Signal Detection of Fibre-optical Icing Sensor |
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| LIU Zhi-jun
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YE Lin
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CHEN Bin
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GE Jun-feng
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WANG Li-wen.Realization of Lock-in Detect Circuit on Weak Signal Detection of Fibre-optical Icing Sensor[J].Instrument Technique and Sensor,2012(3):79-81. |
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| Authors: | LIU Zhi-jun YE Lin CHEN Bin GE Jun-feng WANG Li-wen |
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| Affiliation: | 1.Department of Control Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074, China;2.Base of Special Equipment Research,Civil Aviation University of China,Tianjin 300300,China) |
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| Abstract: | The signal from light intensity modulation by ice of the fibre-optical icing sensor(FIS)is weak,and interference sources can be everywhere.After comparing the commonly used weak signal detection methods(WSD),this paper designed a reduced-bandwidth high-performance lock-in amplifier(LIA)by combining synchronous integrator and correlator and established a mathematical model of nioseproof feature of the LIA.A high-reliability icing detection system(IDS)was set up.Icing experiments results show that the LIA circuit can effectively get the weak signal of the FIS. |
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| Keywords: | fibre-optical icing sensor icing detection system weak signal LIA |
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