針對在強(qiáng)電磁干擾環(huán)境下閉環(huán)控制系統(tǒng)的數(shù)據(jù)采集問題，設(shè)計了弱信號的高精度數(shù)據(jù)采集濾波系統(tǒng)，并進(jìn)行了相應(yīng)的誤差分析；討論了常見數(shù)字濾波器的濾波原理及其基于現(xiàn)場可編程門陣列的設(shè)計實(shí)現(xiàn)，提出了自適應(yīng)消除噪聲的設(shè)計原理。其結(jié)果是系統(tǒng)具有單獨(dú)運(yùn)行、易編程、數(shù)字濾波等優(yōu)點(diǎn)，在信號采集、控制中應(yīng)用前景廣泛。
關(guān) 鍵 詞 高精度數(shù)據(jù)采集; 濾波; 現(xiàn)場可編程門陣列; 獨(dú)立運(yùn)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