Research on smart clock synchronization method based on GPS for seismic data acquisition and recording system

Jinshi Xu; Di Wu; Xiao bo Sui; Xu Yang; Qiang Ruan; Tianfan Xu; Zhicheng Liu

doi:10.1117/12.2558447

4 May 2020 Research on smart clock synchronization method based on GPS for seismic data acquisition and recording system

Jinshi Xu, Di Wu, Xiao bo Sui, Xu Yang, Qiang Ruan, Tianfan Xu, Zhicheng Liu

Author Affiliations +

Proceedings Volume 11382, Smart Structures and NDE for Industry 4.0, Smart Cities, and Energy Systems; 113820Z (2020) https://doi.org/10.1117/12.2558447
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

When a large-scale seismic data acquisition and recording system is applied for long-term continuous data acquisition, it is often affected by factors such as temperature, excitation level and acceleration changes perceived by the crystal unit. Since there is no accumulative error for GPS time and the short-term stability of GPS local clock is outstanding, this paper designs a scheme that uses GPS clock as standard clock to time FCU(Field Control Unit), then uses GPS highprecision second pulse, and uses least square method and bisection method to calibrate local clock frequency. The test results show that the clock synchronization error of this scheme is less than 800ns, which has the advantages of low cost and good reliability, and can meet the needs of clock synchronization for long-time continuous data acquisition of largescale seismic acquisition and recording system.

Citation Download Citation

Jinshi Xu, Di Wu, Xiao bo Sui, Xu Yang, Qiang Ruan, Tianfan Xu, and Zhicheng Liu "Research on smart clock synchronization method based on GPS for seismic data acquisition and recording system", Proc. SPIE 11382, Smart Structures and NDE for Industry 4.0, Smart Cities, and Energy Systems, 113820Z (4 May 2020); https://doi.org/10.1117/12.2558447

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