14 November 2016 Seismic wave detection system based on fully distributed acoustic sensing
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This paper presents a seismic wave detection system based on fully distributed acoustic sensing. Combined with Φ- OTDR and PGC demodulation technology, the system can detect and acquire seismic wave in real time. The system has a frequency response of 3.05 dB from 5 Hz to 1 kHz, whose sampling interval of each channel of 1 meter on total sensing distance up to 10 km. By comparing with the geophone in laboratory, the data show that in the time domain and frequency domain, two waveforms coincide consistently, and the correlation coefficient could be larger than 0.98. Through the analysis of the data of the array experiment and the oil well experiment, DAS system shows a consistent time domain and frequency domain response and a clearer trail of seismic wave signal as well as a higher signal-noise rate which indicate that the system we proposed is expected to become the next generation of seismic exploration equipment.
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Yue Jiang, Yue Jiang, Tuanwei Xu, Tuanwei Xu, Shengwen Feng, Shengwen Feng, Jianfen Huang, Jianfen Huang, Yang Yang, Yang Yang, Gaoran Guo, Gaoran Guo, Fang Li, Fang Li, "Seismic wave detection system based on fully distributed acoustic sensing", Proc. SPIE 10025, Advanced Sensor Systems and Applications VII, 100250C (14 November 2016); doi: 10.1117/12.2246818; https://doi.org/10.1117/12.2246818

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