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Distributed acoustic sensing for seismic activity monitoring
APL Photonics ( IF 5.6 ) Pub Date : 2020-03-24 , DOI: 10.1063/1.5139602
María R. Fernández-Ruiz 1 , Marcelo A. Soto 2 , Ethan F. Williams 3 , Sonia Martin-Lopez 1 , Zhongwen Zhan 3 , Miguel Gonzalez-Herraez 1 , Hugo F. Martins 4
Affiliation  

Continuous, real-time monitoring of surface seismic activity around the globe is of great interest for acquiring new insight into global tomography analyses and for recognition of seismic patterns leading to potentially hazardous situations. The already-existing telecommunication fiber optic network arises as an ideal solution for this application, owing to its ubiquity and the capacity of optical fibers to perform distributed, highly sensitive monitoring of vibrations at relatively low cost (ultra-high density of point sensors available with minimal deployment of new equipment). This perspective article discusses early approaches on the application of fiber-optic distributed acoustic sensors (DASs) for seismic activity monitoring. The benefits and potential impact of DAS technology in these kinds of applications are here illustrated with new experimental results on teleseism monitoring based on a specific approach: the so-called chirped-pulse DAS. This technology offers promising prospects for the field of seismic tomography due to its appealing properties in terms of simplicity, consistent sensitivity across sensing channels, and robustness. Furthermore, we also report on several signal processing techniques readily applicable to chirped-pulse DAS recordings for extracting relevant seismic information from ambient acoustic noise. The outcome presented here may serve as a foundation for a novel conception for ubiquitous seismic monitoring with minimal investment.

中文翻译:

分布式声学传感,用于地震活动监测

对于获取全球层析成像分析的新见解以及识别导致潜在危险情况的地震模式,全球对地表地震活动进行连续,实时的监测非常重要。由于它的普遍性和光纤能够以相对较低的成本对振动进行分布式,高度灵敏的监视的能力,因此已经存在的电信光纤网络成为此应用的理想解决方案(可使用超高密度的点传感器)新设备的最少部署)。该透视文章讨论了将光纤分布式声传感器(DAS)应用于地震活动监测的早期方法。DAS技术在此类应用中的优势和潜在影响在此通过一种基于特定方法的所谓的chi脉冲DAS的远程地震监测实验结果进行了说明。由于该技术在简单性,跨感测通道的一致灵敏度和鲁棒性方面具有吸引力,因此它在地震层析成像领域提供了广阔的前景。此外,我们还报告了几种适用于techniques脉冲DAS录音的信号处理技术,可用于从环境声噪声中提取相关的地震信息。此处介绍的结果可为以最少的投资实现无处不在的地震监测的新概念奠定基础。由于该技术在简单性,跨感测通道的一致灵敏度和鲁棒性方面具有吸引力,因此它在地震层析成像领域提供了广阔的前景。此外,我们还报告了几种适用于techniques脉冲DAS录音的信号处理技术,可用于从环境声噪声中提取相关的地震信息。此处介绍的结果可为以最少的投资实现无处不在的地震监测的新概念奠定基础。由于该技术在简单性,跨感测通道的一致灵敏度和鲁棒性方面具有吸引力,因此它在地震层析成像领域提供了广阔的前景。此外,我们还报告了几种适用于techniques脉冲DAS录音的信号处理技术,可用于从环境声噪声中提取相关的地震信息。此处介绍的结果可为以最少的投资实现无处不在的地震监测的新概念奠定基础。我们还报告了几种适用于chi脉冲DAS记录的信号处理技术,这些技术可以从环境声噪声中提取相关的地震信息。此处介绍的结果可为以最少的投资实现无处不在的地震监测的新概念奠定基础。我们还报告了几种适用于chi脉冲DAS记录的信号处理技术,这些技术可以从环境声噪声中提取相关的地震信息。此处介绍的结果可为以最少的投资实现无处不在的地震监测的新概念奠定基础。
更新日期:2020-04-23
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