旋轉(zhuǎn)機(jī)械振動(dòng)檢測(cè)裝置數(shù)據(jù)采集的實(shí)現(xiàn)

in，limeng，zhangjin－ming （college ofinformation science and technology，beijing university of chemical technology，beijing 100029，china） abstract：acircuit which has a stricttime order and can automatically acquire data is realized by using cpld，adand fifo．this circuitsolvesthe problemofanti－aliasing filtering when therotational speed of a machineis notconstant． key words：signals acquisition in a complete sampling period；key phase signal；anti－aliasing filtering 1 整周期采樣控制的實(shí)現(xiàn)1．1 整周期采樣 整周期采樣控制是由傅