基于闭环调整策略的无线HART时间同步方法

时间同步是无线传感器网络的关键技术之一。无线HART是用于复杂工业环境的WSN通信协议.为了解决其时间同步问题,文章提出了一种基于闭环调整策略的时间同步方法 CATS。该方法通过测量同步节点之间的时间偏差,获得同步节点之间时间偏差对象模型参数,建立内部受控对象模型,实现节点间的时间偏差的短周期闭环调整。在CC2430通信模块上的实测表明:该方法具有同步精度高、环境适应性好、计算复杂度低等特点,为复杂工业领域中无线HART的时间同步提出了较优的方案。

Closed-loop Adjustment Strategy based time synchronization method for Wireless HART

Time synchronization is one of the key technologies of wireless sensor network.Wireless HART is a wireless sensor network communication protocol which is used in complex industrial environment.A time synchronization method based on clocked-loop adjustment strategy was proposed to solve the synchronization problem of wireless HART nodes.The proposed method gains the time offset model parameters in synchronization by measuring the time offset between the synchronization nodes,creates an internal model of the controlled object and achieves short cycle closed-loop adjustment of time offset.CC2430 communication module is selected as the test platform and the results show that CATS achieves higher synchronization accuracy,stronger environmental adaptability,and lower computational complexity.Thus it provides a program for wireless HART time synchronization in complex industrial field.