基于ARM7的电参数采集系统设计与应用

Design and Application of Parameter Acquisition System Based on ARM7

设计了一种实用的电参数采集系统。采用两片ARM7处理器LPC2134,下位机用LPC2134和高精度16位同步采样芯片AD7657来实现电参数采集计算和状态判断,上位机用LPC2134实现状态显示和数据存储。给出了采样模块的接口电路,同时介绍了系统硬件部分的存储扩展模块、显示模块的结构。最后给出了程序流程图。该平台具有良好的实用性,已作为采集监测模块安装在小电流接地选线装置中。

An electrical parameters acquisition system was designed.It takes two ARM7 processor LPC2134, the next bit using a LPC2134 and high-precision 16-bit chip synchronous sampling AD7657 to achieve the acquisition and calculation,and the state judge using a LPC2134 to achieve the status＇s display and data storage.The in- terface of sampling module was designed.Meanwhile,the hardware of system including the memory expending part and the display part was introduced.Finally,the process flow chart debugged successfully is given. This platform is good practical,been installed in selection of small current grounded system as acquisition module.