网络化测试系统的时钟同步方法研究

Research on the Method of Clock Synchronization of Networked Test System

时钟同步是网络化测试系统中关键问题之一;设计一种新型的软件同步方法,实现了局域网范围内网络化测试设备间的时钟同步;这种时钟同步方法中,从时钟向主时钟发送同步消息,主时钟对接收到从时钟的同步请求消息进行处理,并根据从时钟是否失去同步而采取相应措施;此种为网络化测试系统的时钟同步提供了一种解决方案,在8个测试单元机以2秒为同步周期进行测试时,时钟同步精度可以达到50μs,具有一定的实用性和推广价值。

Clock synchronization is one of the problems in the networked test system. A new method of clock synchronization is re- searched and clock synchronization among test equipments in the local area net is realized. Slave clock send synchronization request messages to the master clock, then, the synchronization request messages are deal by the master clock. The master clock adopt different ways to deal with the synchronization request messages according to the different condition. The precision is 50μs when 8 measurement unit is used in a period of 2s. The technology and methods adopted are practical and worthy of using aboard.