基于FIFO共享RAM的数据采集系统

介绍了用于电力系统动态测辨设计的一种高速数据采集系统。该数据采集系统采用ＬＥＭ模型块作为电网的电流电压输入转换模块，ＬＥＭ模块是用磁补偿原理制作的霍耳器件新型的电流电压传感器，具有测量精度高、线性度好、动态性能及隔离好等优点。系统的智能采集卡自带ＣＰＵ和ＦＩＦＯ缓冲器，插于工控机ＩＳＡ扩展槽。智能数据采集卡通过ＦＩＦＯ存储与工控系统机共享数据，大大提高了数据采集速度和数据缓冲容量。在数据采集卡上设

An Asynchronous FIFO RAM-Based Data Acquisition System

In this paper,a high speed data acquisition system for power system dynamic measurement and identification is introduced.In this data acquisition system,LEM converters are used to translate voltages and currents of the power system.The LEM converter is a new kind voltage and current Hall effect transducer,with high measurement accuracy,good dynamic performance and isolation.The intelligent data acquisition card of this system with its own CPU and FIFO RAM is inserted in ISA bus of industrial control computer.The acquired data are shared by intelligent data acquisition card and industrial control computer,and in this way the acquisition speed and the volume of data buffer are highly improved.In the data acquisition card the driver circuit of AD converter has also been improved.