基于FPGA的高精度数据采集滤波系统设计

针对在强电磁干扰环境下闭环控制系统的数据采集问题，设计了弱信号的高精度数据采集滤波系统，并进行了相应的误差分析；讨论了常见数字滤波器的滤波原理及其基于现场可编程门阵列的设计实现，提出了自适应消除噪声的设计原理。其结果是系统具有单独运行、易编程、数字滤波等优点，在信号采集、控制中应用前景广泛。
关 键 词 高精度数据采集; 滤波; 现场可编程门阵列; 独立运行

Abstract The paper mainly deals with following three aspects: offering a frame of filtering system in collecting high-precision data of weak signals when strong electromagnetic interferes and analyzing the corresponding errors, discussing common digital filtering theory and its realization with field programmable gate array, applying self-adaptive theory to reducing noise. Since the system has such advantages as running independently, writing program easily, and digital filtering, it is to be put into widespread use in collecting and controlling signals.
Key words high-precision data collecting; filtering; field programmable gate array; running independently