一种基于卫星授时的异地时钟同步技术  

A different location clock synchronization technique based on satellite timing

作　　者：宗泽 褚泽帆 唐跃平[1,2] 邵军 符伟杰[1,2,3] ZONG Ze;CHU Ze fan;TANG Yue ping;SHAO Jun;FU Wei jie(Nanjing Hydraulic Research Institute,Nanjing 210029,China;Nanjing Automation Institute of Water Conservancy and Hydrology,Nanjing 210012,China;Research Center on Hydrology and Water Resources Monitoring of the Ministry of Water Resources,Nanjing 210012,China)

机构地区：[1]水利部交通运输部国家能源局南京水利科学研究院,江苏南京210029 [2]水利部南京水利水文自动化研究所,江苏南京210012 [3]水利部水文水资源监控工程技术研究中心,江苏南京210012

出　　处：《电子设计工程》2019年第22期15-19,共5页Electronic Design Engineering

基　　金：国家重点研发计划(2017YFC0405702);中央级公益性科研院所基本科研业务费专项资金项目(Y917009)

摘　　要：针对多机通信联合作业中采用常规校时手段,无法满足单机间时钟同步精度要求的问题,提出了一种基于北斗导航系统的边沿累计差值同步方法。介绍了该方法的基本技术原理和工作流程,并专门设计了以支持北斗定位的国产AT6558D芯片为核心的测试验证模块,通过ARM11内核主控,与CYCLONE FPGA协作进行时钟同步处理。经野外测试,验证了在各向遮挡仰角<20°的条件下,使用该方法的时钟同步精度可达到40 ns(99%以上),与常规方法相比性能提升超过50%。是多机通信联合测量、高速物体测控、目标投递时钟同步的高性价比实现方案,具有良好的应用前景。Use conventional clock correction methods during multi-devices conjoint work via communication,cannot meets requirement of clock synchronization accuracy. To solve this problem,a method called Accumulative Edge Difference Synchronization bases on BDs Navigation Satellite System and other GNSS is proposed in this paper. We introduce its basic principles and workflow,design an evaluation circuit module based on the method uses AT6558 D domestic chip which supports BDs positioning,an ARM11 core chipsets for control,and with a Cyclone FPGA to collaborate clock synchronization. Results from external filed tests show that over 99% of the differences between clock edges of different devices can controlled within 40 ns on the condition that the maximum angle of elevation of shield in all directions below 20 degrees. This method gains over 50% performance improvement compared to other clock synchronization methods and meets the requirement of conjoint work,so that the method is a good cost performance solution of clock synchronization in multi-devices conjoint measurement and control,air target delivery,etc. Thus,it has a good application prospects.

关 键 词：电子与通信 同步 标准差 北斗 

分 类 号：TN98[电子电信—信息与通信工程]