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- 89C51 AD采集交流电的程序50HZ的交流电经过精密整流以后每个周期单通道采集800个点分两个通道采集电压和电流并计算S,P,Q,相位角g -89C51 AD acquisition procedures AC 50HZ precision rectifier of alternating current through each cycle after the 800 points collected single-channel two-channel voltage and curre