多传感器信息融合中时间同步方法的研究

A Time Synchronization Approach for Multi-sensor Fusion

多传感器信息融合技术目前广泛应用于自主车辆导航等信息技术领域,而时间同步技术是多传感器信息融合中的一项关键技术,是实现多传感器信息融合的必备条件之一。为了提高多传感器系统中时间同步的精度,提出了一种局域网内的时间同步方法,方法实现简便且可以提供很好的时间同步精度。通过仿真实验证明了所提出的方法不但在网络延时较小的情况下可以满足多传感器信息融合对时间同步精度的要求,而且在网络延时明显增大的情况下也可达到毫秒级以内的时间同步精度。

Time synchronization technology is very important in the application of multi - sensor fusion, it is one of the essential conditions for multi - sensor fusion project. A time synchronism method is proposed in local area network for increasing time synchronism precision. This method is easy to realize and provides very good time synchronism precision. The simulation experiment shows that this method can meet the time synchronization accuracy requirement of multi - sensor fusion when the network delay is limited. By the way, this approach also can meet the time synchronism precision demand （ 〈1ms） under increased network delay conditions.