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Multiplexed fiber strain sensors for field seismic monitoring
Date
2024
Abstract
Fibre optic sensors have been widely researched in the field of geophysical science due to their high sensitivity, and can work in harsh environments. In this paper, a strainmeter based on fiber Bragg grating-based Fabry-Perot interferometer is proposed and applied in the field of seismic monitoring. The strainmeters series arrays used the Pound-Drever-Hall technique, enabling accurate strain measurements. A 10-channel array was built, and more than 100 earthquakes and the Earth's daily tidal signals were successfully recorded at the Lijiang National Seismic Station. The FBG-FFPIs had a strain resolution of 4.80 pε/√Hz @ 30 Hz. In addition, a 4-channel array was set up at the Heqing seismic station for comparison. The results showed that the FBG-FFPI strainmeters array has great potential for early warning of earthquakes and can provide abundant seismic data.
Supervisor
Description
Publisher
University of Limerick
Citation
20th Sensors and Their Applications Conference, 2024, Paper No: 11
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Files
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Paper_11.pdf
Adobe PDF, 808.59 KB
Funding code
Funding Information
The Basic Research Support Program for Excellent Young Teachers of Heilongjiang Province (YQJH2023281); Taishan Scholars Program; China Postdoctoral Science Foundation (2022M720940); Qingdao Natural Science Foundation (23-2-1-214-zyyd-jch); Fundamental Research Funds of Harbin Engineering University