一种高精度的GPS复合授时方法

摘要

The problem of time service has always been an important issue needed to be addressed in the use of various wilderness equipments. In particular, it is more difficult for non-realtime operating system device to get the high-precision time service. A mil isecond time-service mothed based on GPS for non-realtime operating system device is raised in this paper. The mothed is demonstrated by a computer with WINDOWS operating system. The time service accuracy of non-realtime operating system device is improved by the mix-application of the second pulse signal and the serial-port signal of the GPS time sevice board. The computer get a cheap and easy mil isecond time service by this mothed.%　　授时问题一直以来是在野外使用的各类设备需要解决的一个重要问题，尤其是使用非实时操作系统的设备要实现高精度授时是比较困难的。本文中针对非实时操作系统设备提出了一种基于GPS授时的毫秒级授时方案，以普通装有WINDOWS操作系统的计算机授时为例，通过将GPS授时板的秒脉冲信号与串口授时信号复合使用来提高非实时系统的授时精度，达到对普通计算机系统的毫秒级授时，且成本低、易实现。