Geodynamics and Tectonics Plate Analysis based on Distributed Optical Fibre Acoustic Sensor

基于分布式光纤声学传感器的地球动力学和构造板块分析

• 批准号: NE/S012877/1
• 负责人: Gilberto Brambilla
• 金额: $ 60.19万
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FS012877%2F1
• 关键词: Geodynamics; Tectonics; Plate; Analysis; based

Megathrust earthquakes have long occurred repeatedly in Japan. Since 2011, an oceanic observation networks constituted by point sensors connected by optical fibres have been developed to monitor seismotectonic activities in this region. In this project we expand the seismometer capabilities by using the optical fibre network itself as a distributed seismometer providing thousands of high resolution seismic measurements aimed at clarifying the source of the very low frequency earthquakes based in the accretionary wedge between the Philippine Sea Plate and the Eurasian continent, which were discovered by the DONET stations in 2015.After initial tesing in JAMSTEC own fiber optic cables off Toyohashi, Aichi, Japan and Hatsushima, Shizuoka, Japan, a portable unit will be manufactured and will be taken on the research vessel R/V Shinsei-maru to be connected to the 10 km fibre optic extension cables via a fibre optic cable of the shipboard remotely operated vehicle. The novel distributed seismometer will be tested in the DONET stations to produce a 3D map of seismic activity along the Nankai through and investigate possible links links with the structure of the subducting plate interface.

日本长期以来多次发生大规模逆冲型地震。自2011年以来，已经开发了由光纤连接的点传感器组成的海洋观测网络，以监测该区域的地震构造活动。在这个项目中，我们通过使用光纤网络本身作为分布式地震仪来扩展地震仪的能力，提供数千个高分辨率地震测量，旨在澄清菲律宾海板块和欧亚大陆之间的增生楔中的极低频地震的来源，在日本爱知县丰桥市和日本静冈县初岛市附近的JAMSTEC自有光纤电缆进行初步测试后，将制造一个便携式装置，装在研究船R/V Shinsei-maru上，通过船上遥控潜水器的光纤电缆与10公里长的光纤延长电缆连接。新的分布式地震计将在DONET台站进行测试，以制作沿着南海地震活动的3D地图，并调查与俯冲板块界面结构的可能联系。

项目成果

Long Range Raman-Amplified Distributed Acoustic Sensor Based on Spontaneous Brillouin Scattering for Large Strain Sensing.

• DOI: 10.3390/s22052047
• 发表时间: 2022-03-06
• 期刊: Sensors (Basel, Switzerland)
• 作者: Bakhtiari Gorajoobi S;Masoudi A;Brambilla G
• 通讯作者: Brambilla G

Multi-parameter optical gauge based on mode coupling effect in asymmetric index multi-core fibres

• DOI: 10.1016/j.optlaseng.2022.107047
• 发表时间: 2022
• 期刊: Optics and Lasers in Engineering
• 影响因子: 4.6
• 作者: O. Arrizabalaga;Q. Sun;Timothy Lee;J. Zubía;Javier Velasco Pascual;I. Ocáriz;A. Schülzgen;R. Amezcua-correa;G. Brambilla;M. Beresna

Surface deployment of DAS systems: Coupling strategies and comparisons to geophone data

DAS 系统的地面部署：耦合策略以及与地震检波器数据的比较

• DOI: 10.1002/nsg.12232
• 发表时间: 2022
• 期刊: Near Surface Geophysics
• 影响因子: 1.6
• 作者: Harmon N

Subsea Cable Condition Monitoring With Distributed Optical Fiber Vibration Sensor

• DOI: 10.1109/jlt.2019.2893038
• 发表时间: 2019-02-15
• 期刊: JOURNAL OF LIGHTWAVE TECHNOLOGY
• 影响因子: 4.7
• 作者: Masoudi, Ali;Pilgrim, James A.;Brambilla, Gilberto
• 通讯作者: Brambilla, Gilberto

A 10 cm spatial resolution distributed acoustic sensor based on ultra low-loss enhanced backscattering fibre

基于超低损耗增强后向散射光纤的10 cm空间分辨率分布式声学传感器

• DOI: 10.21203/rs.3.rs-1577857/v1
• 发表时间: 2022
• 作者: Masoudi A