北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2017, Vol. 40 ›› Issue (6): 109-114.doi: 10.13190/j.jbupt.2017-030

• 研究报告 • 上一篇    下一篇

Phi-OTDR技术信号处理中的特征提取方法

胡燕祝1, 王松1, 李雷远1,2   

  1. 1. 北京邮电大学 自动化学院, 北京 100876;
    2. 南京大学 光通信工程研究中心, 南京 210009
  • 收稿日期:2017-03-22 出版日期:2017-12-28 发布日期:2017-12-28
  • 作者简介:胡燕祝(1970-),男,教授,博士生导师,E-mail:yzhu@263.net.
  • 基金资助:
    国家自然科学基金资助项目(61627816,61503034);国家重点研发计划项目(2015BAK40B03,2016YFC0701309);北京市科技计划项目(D161100004916002)

Feature Extraction Research in Signal Process with Phi-OTDR Technology

HU Yan-zhu1, WANG Song1, LI Lei-yuan1,2   

  1. 1. Automation College, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    2. Institute of Optical Communication Engineering, Nanjing University, Nanjing 210009, China
  • Received:2017-03-22 Online:2017-12-28 Published:2017-12-28
  • Supported by:
     

摘要: 在相位光时域反射(Phi-OTDR)技术分布式振动信号的处理中,为了保证时间轴上的信噪比和长度轴上的作用域同时得到提升,同时兼顾保留信号特征和时域快速处理2个条件,采用了"信噪分类、信号保留、噪声归零"的方式进行信号处理.在信噪分类的过程中,首次提出利用改进的实时编码信号处理算法,在时域上对Phi-OTDR分布式振动信号数据进行时域编码和特征提取.所提方法可以同时提高长度轴上的作用域和时间轴上作用域内各点的信噪比,运算速率也得到了一定的提升.

关键词: 相位光时域反射信号, 特征提取, 信号处理

Abstract: In the phase-sensitive optical time domain reflectometer (Phi-OTDR), noise-signal ratio on time axis and effective range on length axis are two important factors. Reservation of signal characteristics and rapid processing in time domain are also two important conditions. To optimize these factors and conditions, the signal by signal-noise classification, signal reservation and noise reduction was processed. In signal-noise classification, the time encode signal processing algorithm was improved for coding and extract feature of distributed vibration signal in time domain. The signal range on the length axis and the signal-to-noise ratio of each point on the time axis can be improved. At the same time, the calculation speed is also improved.

Key words: phase-sensitive optical time domain reflectometer signal, feature extraction, signal processing

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