摘要
为保证Wireless HART网络节点时间严格一致,研究了Wireless HART网络时隙建立过程、主动同步和被动同步时间同步机制,提出了keep-alive数据包周期的计算方法和基于TDMA时隙校正的高精度时间同步算法,该时间同步算法通过单个时隙计数器闭环微调,使网络节点间时钟高度同步。使用Wireless HART通信平台WH-M组网验证了该算法的效果,比使用该算法前降低83%的同步误差。
In order to make WirelcssHART network node clock be synchronized, the time-sync mechanism was researched in- cluding time slot setting up, active time-sync and passive time-sync steps for a WirelessHART network.The way to calculate keep- alive packet cycle and the high-precision time-sync algorithm was presented.The time-sync algorithm adopts single time slot closed- loop adjustment method to realize the whole network high-precision synchronization.The test effect on WirelessHART platform WH -M proves that time difference between nodes was reduced by 83%.
出处
《仪表技术与传感器》
CSCD
北大核心
2015年第4期84-87,共4页
Instrument Technique and Sensor
基金
国家高技术研究发展计划资助项目(2011AA040103)
