一种基于北斗卫星导航系统的校时系统

Timing system based on Beidou satellite navigation system

为了更好地利用北斗卫星导航系统(BDS)提供的开放式免费授时服务,摆脱计算机终端系统校时对全球定位系统(GPS)的依赖,在分析了BDS功能特点和授时原理的基础上,以和芯星通公司BDS接收模块UM220芯片为平台搭建了校时硬件电路,给出了计算机终端校时系统软件实现及工作过程.系统运行结果表明,设计的校时系统可靠性高,授时精度可满足计算机终端系统的要求,具有较大实用价值.

In order to make better use of the open, free and timing service provided by Beidou satellite navigation system （BDS）, and get rid of the dependence of computer terminal system’s timing on GPS, this paper sets up a timing hardware circuit with the platform using the BDS receiving module UM220 produced by Hexinxingtong company, based on analyzing the BDS’s functional features and timing principles, and presents the implementation of computer terminal timing software and its operating process. Results of system running show that the designed timing device is of high reliability and its timing precision could meet the demand of computer terminal system, thus possessing a greater practical vulue.