分布式声学传感用于近地表面地震监测的应用
Eslam Roshdy1,2, Mariusz Majdański1, Szymon Długosz3
1Institute of Geophysics, Polish Academy of Sciences, 01-452 Warsaw, Poland.
Sensors (Basel, Switzerland)
|March 17, 2025
概括
光纤传感 (DAS) 为地震调查提供了优越的空间和时间分辨率,与传统的地声相比. 这项技术有效地监控在具有挑战性的环境中关键基础设施,改进地缘危险评估.
科学领域:
- 地质物理学 地质物理学
- 环境地震学 环境地震学
- 传感器技术 传感器技术
背景情况:
- 高分辨率的近地图像对地缘危险研究和结构健康监测至关重要.
- 传统的地声测量在复杂的地质环境中面临着局限性.
研究的目的:
- 评估分布式声学传感 (DAS) 光纤技术,用于积极的地震调查.
- 为了将DAS性能与监控关键基础设施的标准地声调查进行比较.
主要方法:
- 在Rybnik水库堤使用DAS和地质声器同时进行活跃的地震调查.
- 采用详细的数据处理方法来直接比较数据集.
- 利用表面波的多通道分析 (MASW) 进行S波速度分析.
主要成果:
- DAS提供了与地球声器相似的数据质量,但空间和时间分辨率明显更高.
- DAS在具有高地震噪音和可变地形的复杂环境中表现出有效性.
- 使用DAS数据的MASW在S波速度方面实现了较低的RMS误差 (3.26%),而与地电话 (6.2%) 相比,S波速度更低.
- 发现DAS数据处理和解释更容易.
结论:
- DAS是一种高度适应和有效的技术,用于监控关键基础设施和地缘危险.
- 它的高分辨率和在具有挑战性的条件下易于使用,增强了地质物理评估.
- 将DAS与传统的地震方法相结合,可以更全面地了解随着时间的推移地表 properties.
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