| 基于PTP协议的提高工业以太网时钟同步精度的方法研究 |
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| 引用本文： | 卓岩,白涛.基于PTP协议的提高工业以太网时钟同步精度的方法研究[J].化工自动化及仪表,2016(9):949-952. |
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| 作者姓名： | 卓岩 白涛 |
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| 作者单位： | 1. 上海交通大学电子信息与电气工程学院,上海,200240;2. 深圳中广核工程设计有限公司,广东 深圳,518172 |
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| 摘 要： | 介绍了PTP系统模型及其时间传播过程、点对点透明时钟的精确时钟同步原理,应用点延时机制计算路径延时。针对晶振频率漂移对硬件打时间戳的影响,用频率补偿算法来获得更准确的时间戳,从而提高工业以太网的时钟同步精度。
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| 关 键 词： | 时钟同步 精度 PTP协议 频率漂移 透明时钟 |
Research of Improving Industrial Ethernet Clock Synchronization Accuracy Based on PTP Protocol |
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| Abstract: | Both system model and PTP time propagation process was described, including the principle of peer-to-peer transparent clock’ s accurate clock synchronization and making use of delay mechanism to calcu-late path delay. Regarding crystal oscillator frequency deviation’ s effect on hardware timestamp, the frequency compensation algorithm was adopted to obtain a more accurate timestamps to improve industrial Ethernet clock synchronization accuracy. |
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| Keywords: | clock synchronization accuracy PTP protocol frequency drift transparent clock |
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