基于IEEE1588 LXI仪器系统时钟同步的分析和研究  

Analysis and Research of Clock Synchronization in LXI Based on IEEE1588

作　　者：田宏安[1] 赵建[1] 吴树魁[1] 

机构地区：[1]西安电子科技大学机电工程学院,陕西西安710071

出　　处：《仪表技术》2009年第3期4-6,9,共4页Instrumentation Technology

摘　　要：在LXI A类和B类仪器系统中,要求时钟同步精度达到亚微秒级。为了满足这个同步精度,文章对IEEE1588精密时钟同步机制和算法进行了研究,分析了LXI仪器系统中影响同步的因素,提出了采用本地时钟晶振补偿和PI控制算法,在MAC层获取时间戳并进行完善的方法,提高了同步精度,满足了LXI A类和B类仪器对时钟同步的要求。In LXI A and B kind of instrument system, clock synchronization precision is required to achieve sub-microsecond level. In order to satisfy the requirement, the IEEE1588 precision clock synchronization mechanism and algorithm are researched. The factors of affecting synchronization are analized. The algorithm of local clock crystal oscillator compensation and PI control, and the method of acquiring timestamp in MAC level are proposed. By these measures, synchronization precision is improved and the clock synchronization requirement for LXI A and B kind instrument is satisfied.

关 键 词：LXI IEEE1588 时钟同步 晶振补偿 PI控制算法 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]