分布式同步数据采集系统的研究与设计

针对广域分布环境中,多台数据采集仪时间同步的难题,根据GPS授时原理,应用GPS长期稳定高精度GPS秒脉冲,设计了一种高精度的同步数据采集系统。系统核心由数据采集单元、微控制器、复杂可编程逻辑、带有秒脉冲输出的GPS模块组成。实验带有8路并行的高速AD通道,结果证实了该采集功能的可靠性,异地同类型设备的时间同步不确定度约为5μs。

Research and Design of Distributed Synchronous Data Acquisition System

In order to solve the problem of time synchronization of more than one data acquisition instruments in the wide-area-distributed environment,according to the principle of GPS and the GPS second-pulse with the long stability and high-precision,a high precision system of synchronous data acquisition is designed.The system consists of data acquisition unit,micro-controller,complex programmable logic device and GPS module with second-pulse output.The experiments with 8-channel parallel high-speed AD sampling,the result shows that the acquisition function is reliable.The time synchronization uncertainty of the same type of device in different place is within 5μs.