基于主站GPS无线广播重发精确同步校时方案的实现

Scheme of Synchronization Timing Based on Master Station GPS Wireless Broadcast Retransmission

摘要:

无线分布式测量系统中,测量时钟的同步与校时是系统实现的重点和难点技术问题；提出一种基于主站GPS的无线精确校时方案,即在主站配置GPS同步时钟源,再通过无线帧信号广播重发侦听方式,对子站时钟进行高精度同步校时；文章重点讨论了利用nRF905无线模块实现广播重发侦听校时的网络系统结构、校时原理、校时精度、较传统无线校时方案的优势以及其它影响校时精度的因素等内容；本校时方案应用于在线绝缘带电检测系统使中,既降低了硬件成本,又取得了高精度的校时效果,完全满足系统设计要求。

Abstract:

In wireless distributed measurement system, the key and difficult technical problem is the synchronization of measurement time. In this paper, a new method based on the GPS of the master station is presented, in which the master station had configured a GPS synchronization clock source, and then use the wireless broadcast retransmission frame signal interception mode to synchronize the sub-station time with high precision. In this paper, we discussed how to use nRF905 wireless module to realize broadcasting retransmission sense, include system structure, principle, accuracy, the comparison with the traditional wireless correcting scheme and other accuracy factors need pay attention. The scheme applied to the on-line insulation detection system, which can reduce the hardware cost and achieve high accuracy.