| 分布式地震数据采集器的高精度时间同步系统研制 |
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| 引用本文： | 李彩华,滕云田,周健超,胡星星,王喜珍,李小军,王玉石.分布式地震数据采集器的高精度时间同步系统研制[J].地震学报,2022,44(6):1111-1120. |
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| 作者姓名： | 李彩华 滕云田 周健超 胡星星 王喜珍 李小军 王玉石 |
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| 作者单位： | 1.中国北京 100081 中国地震局地球物理研究所 |
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| 基金项目： | 科技部重点研发计划项目（2019YFC1511000）和中国地震局地球物理研究所基本科研业务费（DQJB19B13）联合资助 |
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| 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。
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| 关 键 词： | 时间同步 分布式数据采集 延时测量 时间校正 |
| 收稿时间： | 2022-02-13 |
Design on high-precision time-synchronization system for distributed seismic data acquisition |
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| Affiliation: | 1.Institute of Geophysics，China Earthquake Administration，Beijing 100081，China2.Department of Urban Construction，Beijing University of Technology，Beijing 100124，China |
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| 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. |
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