Design on high-precision time-synchronization system for distributed seismic data acquisition
-
摘要: 为了解决分布式地震数据采集系统的同步授时问题，本文研制了一套高精度时间同步授时系统。该系统在通信过程中周期性地发送同步授时秒脉冲，并通过授时秒脉冲传输实现实时传输延时测量及时间校正，从而实现多通道高精度同步授时。基于此设计原理，采用高速硬件可编程器件研制了同步授时系统，并通过测试证实该系统在2 km通信距离时同步授时精度优于200 ns，表明该同步授时系统稳定、可靠并具有一定实用性。Abstract: In order to solve the time-synchronization problem of distributed seismic data acquisition system, we designed a new high-precision time-synchronization technical system in this paper. In this system, a synchronous timing pulse was transmitted periodically during data communication. Through transmitting time measurement and its transmission delay time correction of synchronous timing pulse, high-precision multi-channel time synchronization was achieved in this technical system. And a time-synchronization technical system designed with high-speed programed chips was used to carry out the time-synchronous test. The result proves that the synchronous timing accuracy of time-synchronous system is better than 200 ns when the optical fiber is 2 km, which indicates that the time-synchronization system is stable and practical.
-
-
![]()
图 1 同步授时秒脉冲（a）及延时校正后的授时秒脉冲（b）
Figure 1. Synchronous timing second pulse （a） and timing second pulse after delay correction （b）
![]()
图 7 校正前（a）、后（b）的各模块时间脉冲时序图
Figure 7. Uncorrected （a） and corrected （b） timing pulse sequence diagrams of each module
-
郭长发. 2018. 基于FPGA实现1 PPS高分辨率检测的研究与实现[J]. 科技经济导刊,26(16):6–8. Guo C F. 2018. Research and implementation of 1 PPS high resolution detection based on FPGA[J]. Technology and Economic Guide,26(16):6–8 (in Chinese).
刘辰,李小军,景冰冰. 2018. 基于强震动台阵记录的震源破裂长度实时估测方法[J]. 地震学报,40(3):387–398. doi: 10.11939/jass.20170202 Liu C,Li X J,Jing B B. 2018. Real-time estimation of rupture length of earthquake source based on records of strong motion array[J]. Acta Seismologica Sinica,40(3):387–398 (in Chinese).
马红皎,吴华兵,李梦,王康,武建锋,何在民,胡永辉. 2014. 一种双向测距与时间同步系统的设计与分析[J]. 时间频率学报,37(1):18–24. doi: 10.3969/j.issn.1674-0637.2014.01.003 Ma H J,Wu H B,Li M,Wang K,Wu J F,He Z M,Hu Y H. 2014. Design and analysis of system of dual ranging and time synchronization[J]. Journal of Time and Frequency,37(1):18–24 (in Chinese).
彭栋,郭伟. 2018. 安全网络授时服务技术研究[J]. 时间频率学报,41(1):37–45. doi: 10.13875/j.issn.1674-0637.2018-01-0037-09 Peng D,Guo W. 2018. Research of security network timing service technique[J]. Journal of Time and Frequency,41(1):37–45 (in Chinese).
王向军,张亚元,张龙祥. 2016. 基于GPS和高精度实时时钟的时间同步方法[J]. 纳米技术与精密工程,14(1):66–70. Wang X J,Zhang Y Y,Zhang L X. 2016. Time synchronization based on GPS and high-accuracy real-time clock[J]. Nanotechnology and Precision Engineering,14(1):66–70 (in Chinese).
魏丰,孙文杰. 2009. IEEE 1588协议时钟同步报文的精确时间标记方法研究[J]. 仪器仪表学报,30(1):162–169. doi: 10.19650/j.cnki.cjsi.2009.01.031 Wei F,Sun W J. 2009. Precise time stamping method for IEEE 1588 clock synchronization message[J]. Chinese Journal of Scientific Instrument,30(1):162–169 (in Chinese).
翟学明,杨磊,杨亮. 2016. 基于FPGA的GPS同步授时与授时方案设计与实现[J]. 测控技术,35(5):153–156. doi: 10.3969/j.issn.1000-8829.2016.05.037 Zhai X M,Yang L,Yang L. 2016. Design on a GPS timing and time keeping scheme based on FPGA[J]. Measurement &Control Technology,35(5):153–156 (in Chinese).
Meng L,Allen R M,Ampuero J P. 2014. Application of seismic array processing to earthquake early warning[J]. Bull Seismol Soc Am,104(5):2553–2561.
下载:
计量
- 文章访问数: 321
- HTML全文浏览量: 137
- PDF下载量: 95
