| 小波分析在地铁杂散电流光纤传感系统中的应用 |
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| 引用本文： | 蔡李花,方海峰. 小波分析在地铁杂散电流光纤传感系统中的应用[J]. 光电技术应用, 2011, 26(4): 69-72 |
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| 作者姓名： | 蔡李花 方海峰 |
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| 作者单位： | 中国矿业大学机电工程学院,江苏徐州,221116 |
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| 基金项目： | 江苏省自然科学基金(BK2006037) |
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| 摘 要： | 基于光纤传感的地铁杂散电流监测系统所采集到的数据中存在的噪声主要包括3个方面：传感光路系统的噪声、光电转换部分的噪声、信号采集电路的噪声。为了有效地消除整个传感系统中的噪声，通过对其进行小波变换分析进行信噪分离。利用小波阈值去噪方法，并通过合理地选取阈值函数，以及选用Daubechies小波系作为小波基，对电流信号以及...
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| 关 键 词： | 小波分析 杂散电流 光纤传感 阈值函数 |
Application of Wavelet Analysis in Optical Fiber Sensing System of Metro Stray Current |
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| CAI Li-hua,FANG Hai-feng. Application of Wavelet Analysis in Optical Fiber Sensing System of Metro Stray Current[J]. Electro-Optic Technology Application, 2011, 26(4): 69-72 |
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| Authors: | CAI Li-hua FANG Hai-feng |
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| Affiliation: | CAI Li-hua,FANG Hai-feng (College of Mechanical & Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China) |
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| Abstract: | The data collected from the metro stray current monitoring system based on optical fiber sensing existed noise,which mainly included three aspects,such as the noise of sensing optical path system,the noise of photoelectric conversion and the noise of signal acquisition circuit.In order to eliminate efficiently those noises from the whole sensing system,the wavelet analysis is used to process signal-noise separation.The wavelet threshold denoising method is used,the threshold function is reasonably chosen an... |
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| Keywords: | wavelet analysis stray current optical fiber sensing threshold function |
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