分布式同步数据采集系统的研究与设计
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摘要
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。
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.
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.
引文
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[3]戚淑芬,李明,李利洁,等.嵌入式GPS数据采集系统的设计与实现[J].仪器仪表学报,2006,27(增刊1):127-129.
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[5]阳继军.基于GPS授时的地震采集系统同步系统设计[J].石油仪器,2009,23(1):82-87.
[6]罗冯涛,王渝.ADμC812单片机控制系统的开发[J].现在电子技术,2002(2):10-12.
[7]徐志军,徐光辉.CPLD/FPGA的开发与应用[M].电子工业出版社,2002.
[8]谭会生,张昌凡.EDA技术及应用[M].西安:西安电子科技大学出版社,2001.
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