基于GPS与无线电的时间同步系统设计

Design of Time Synchronization System Based on GPS and RADIO

在水中漂浮式传感器阵列测试系统中,为了对被测对象进行准确的测试,多传感器数据融合非常重要,而时间同步是实现多传感器数据融合的必备条件之一;为了提高时间同步精度,利用单片机Atmega162和Xilinx公司的Coolrunner2系列的CPLD———XC2C256作为控制核心,RSB-4H模块接收GPS信号,NRF905进行无线数据收发,通过软件、硬件设计,开发出基于GPS和无线电的时间同步系统;实验结果表明,各传感器节点之间的事件同步触发误差达到了微秒级,并具有很高的可靠性,可以广泛使用。

In the water＇s floating sensor array test system, in order to measure the object accurately, multi-sensor data fusion is very important, and time synchronization is the necessary conditions to achieve multi sensor data fusion. For increasing time synchronization pre cision, the microcontroller Atmega162 and the Xilinx Inc＇s CPLD of the Coolrunner2 series XC2C256 are the core of the controller, while the RSB-4H module receives GPS signals, NRF905 is used to transmit data. Through software and hardware design, the time synchronization system based on GPS and RADIO is developed. The results show that the event trigger synchronization error between the sensor nodes is microsecond- level, has high reliability, and can be used widely.