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.
出处
《仪表技术》
2009年第3期4-6,9,共4页
Instrumentation Technology
