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Analysis of Optical Fading In Phase-OTDR Distributed Acoustic Sensing Systems: The Effects of Fading in Threat Detection

机译：相位OTDR分布式声学传感系统中的光学衰减分析：威胁检测中衰减的影响

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摘要

Signal fading is a widely observed phenomenon in communication and sensing applications that results in spatially and temporally varying degradations in the received signal power. Specifically, for distributed acoustic sensing (DAS) applications based on phase sensitive Optical Time Domain Reflectometry (phase-OTDR). it is reported that optical signal fading is observed as random dramatic signal power fluctuations, which in turn cause substantial variations in threat detection sensitivity. In this paper, we study optical signal fading in the context of phase-OTDR based DAS from a signal processing perspective and analyze the undesired effects of fading on threat detection performance. Using a detailed phase-OTDR signal model, we analyze the effects of internal system parameters and external vibration source characteristics on optical fading. Based on these analyses, we define the conditions under which optical fading can manifest itself as a dramatic variation in threat detection performance.
机译：信号衰落是在通信和传感应用中被广泛观察到的现象，其导致接收信号功率的时空变化。具体来说，对于基于相敏光时域反射仪（phase-OTDR）的分布式声学传感（DAS）应用。据报道，观察到光信号衰落是随机的，剧烈的信号功率波动，继而引起威胁检测灵敏度的巨大变化。在本文中，我们从信号处理的角度研究了基于相位OTDR的DAS中的光信号衰落，并分析了衰落对威胁检测性能的不良影响。使用详细的相位OTDR信号模型，我们分析了内部系统参数和外部振动源特性对光学衰落的影响。基于这些分析，我们定义了条件，在这种条件下，光学衰落可以表现为威胁检测性能的巨大变化。

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  • 来源
    《》|2018年|107870F.1-107870F.19|共19页
  • 会议地点 Berlin(DE)
  • 作者

    Metin Aktas; Hakan Maral; Toygar Akgun;

  • 作者单位

    ASELSAN Inc., Mchmct Akif Ersoy Mah. 296. Cd. No:16, 06370 Ycnimahalle, Ankara,Turkey;

    ASELSAN Inc., Mchmct Akif Ersoy Mah. 296. Cd. No:16, 06370 Ycnimahalle, Ankara,Turkey,TOBB University of Economics and Technology, Sogutozu Mah., Sogutozu Cd. No:43, 06510 Cankaya, Ankara. Turkey;

    ASELSAN Inc., Mchmct Akif Ersoy Mah. 296. Cd. No:16, 06370 Ycnimahalle, Ankara,Turkey;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    OTDR; phase-OTDR; fading; extinction ratio; distributed acoustic sensing;

    机译：OTDR； OTDR阶段；衰退;消光比分布式声学感应;

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