一种用于光纤链路振动信号模式识别的规整化复合特征提取方法
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摘要
相位光时域反射链路监测系统是一种利用光纤作为传感介质的传感系统,能够监测、定位、识别入侵信号.模式识别模块是其重要组成部分,实时智能区分安全扰动和危险入侵.本文提出一种用于光纤链路振动信号模式识别的复合特征提取方法.利用改进的双门限方法确定有效信号段的起止位置,结合最大能量与最高信噪比挑选出采样周期内主要入侵扰动的特征段.综合利用特征段时域持续时间和小波包能量谱提取复合特征向量,使用支持向量机进行模式识别.实验表明,基于本文提出的规整化特征提取方法的模式识别准确率有了显著提高.
Phase optical time-domain reflectometer link monitoring system is a kind of sensor system which uses optical fiber as sensing medium. It can detect, recognize and locate invasive signals. The module of pattern recognition, which is one of the important parts of the system, can intelligently and instantly distinguish dangerous intrusions from safe disturbances. This paper proposes a regular composite feature extraction method which can be used for vibrational signal pattern recognition in an optical fiber monitoring system. This method applies an improved double-threshold method to detect the start-stop positions of the valid signal segments, and then combines the maximum energy and maximum signal noise ratio to select the main invasion feature segment within a sampling period. The composite eigenvectors,which are extracted by using the last time of the feature segment and wavelet packet energy spectrum, can be used by the support vector machine to recognize the signal patterns. Experiment results show that the accuracy rate of the pattern recognition has been improved significantly based on the proposed method in this paper.
引文
[1]Li C Y,Teng Y T,Li X J 2012 Journal of Earthquake Engineering and Engineering Vibratio 32 16(in Chinese)[李彩云,滕云田,李小军2012地震工程与工程振动32 16]
    [2]Juarez J C,Maier E W,Choi K N,Taylor H F 2005Journal of Lightwave Technology 23 2081
    [3]Turitsyn S K,Boscolo S 2009 Transparent Optical Network Azores,June 28–July 2 2009 p1
    [4]Gu Yu,Li Qiang 2014 Chin.Phys.B 23 044213
    [5]Zhao J,Ding J,Wan S R,Sun X H 2011 Journal of Southeast University:Natural Science Edition 41 41(in Chinese[赵杰,丁吉,万遂人,孙小菡2011东南大学学报:自然科学版41 41
    [6]Zhang X G 2000 Acta Automatic Sinica 26 32(in Chinese)[张学工2000自动化学报26 32]
    [7]Wang F F,Zhang Y R 2012 Chin.Phys.B 21 050204
    [8]Qu Z G,Feng H,Zeng Z M,Zhuge J C,Jin S J 2010Measurement 43 513
    [9]Faiz Bukhari Mohd Suah,Musa Ahmad,Mohd Nasir Taib 2003 Sensors and Actuators B:Chemical 90 182
    [10]Qi H,Wang F B,Deng H 2013 Acta Phys.Sin.62104301(in Chinese)[祁浩,王福豹,邓宏2013物理学报62 104301]
    [11]Xu B G,Song A G,Fei S M 2011 Acta Electronica Sinica38 1025(in Chinese)[徐宝国,宋爱国,费树岷2011电子学报38 1025]
    [12]Yang G A,Zhong B L,Huang R,Jia M P,Xu Y F 2001Journal of Vibration and Shock 20 25(in Chinese)[杨国安,钟秉林,黄仁,贾民平,许云飞2001振动与冲击2025]
    [13]Gao Q,Yi S H,Jiang Z F,Zhao Y X,Xu Y F 2012 Chin.Phys.B 21 064701
    [14]Mallat S 1989 IEEE Trans.Pattern Analysis and machine Intelligence 11 674
    [15]Xia S Y,Pan H,Jin L Z 2009 Computer Engineering and Applications 45 167(in Chinese)[夏思宇,潘泓,金立左2009计算机工程与应用45 167]

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