針對在強電磁干擾環境下閉環控制系統的數據采集問題，設計了弱信號的高精度數據采集濾波系統，并進行了相應的誤差分析；討論了常見數字濾波器的濾波原理及其基于現場可編程門陣列的設計實現，提出了自適應消除噪聲的設計原理。其結果是系統具有單獨運行、易編程、數字濾波等優點，在信號采集、控制中應用前景廣泛。
關 鍵 詞 高精度數據采集; 濾波; 現場可編程門陣列; 獨立運行

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