基于ARM-Linux的激光通信高精度实时数据采集系统设计

Design of High-precision and Real-time Data Acquisition System for Laser Communication Based on ARM-Linux

针对激光通信对数据采集系统的高精度、强实时、多通道的性能要求,以及传统单片机数据采集系统无法适应高安全性、强实时性应用场合的缺点,设计了一种基于ARM9处理器核S3C2440并嵌入Linux操作系统的数据采集系统。该系统扩展FPGA作为前端数据采集的控制芯片,实现数据的高速、高精度采集,ARM作为主控芯片实现系统的管理调度,通过Qt制作交互界面将采集的数据进行显示实现人机交互。实验表明,设计的嵌入式数据采集系统能够实现精度优于1 mV的电压数据采集并能实时显示。与传统的数据采集系统相比,系统具有较高的实时性、稳定性而且扩展性强。

In order to meet the performance requirements of data acquisition systems of laser communication on high-precision,hard real-time and multi-channel,as well as overcoming the shortcomings of traditional single-chip data acquisition system on high security and strong real-time applications,a high-precision and hard real-time data acquisition system has was designed based on ARM9 with Linux. In this system,FPGA was the control chip of front-end data acquisition to achieve high-speed and high-precision data acquisition,and ARM worked as master chip to realize the system＇s management and QT realized the interactive interface.The results show that the embedded data acquisition system not only can achieve the accuracy of better than 1 m V data acquisition,but also can real-time display. Compared with traditional data acquisition system,this system has high real-time performance,stability and strong expansion.