三相多功能电表设计摘要本方案主要由检测电路、专用电能计量芯片ATT7022、STC12单片机、128×64液晶显示、按键、RS485通信、红外通信以及电源部分组成。电路中的电流(电压)信号经过电流(电压)互感器,强电信号转换为安全的弱电信号,通过ATT7022把计量数据传给单片机,由单片机控制128×64液晶显示,另设按键可选择显示测量数据,并扩展RS485和红外线通信功能。因为ATT7022具有极高的精度,能够达到1级测量精度要求,由于互感器铁芯趋于饱和,当电力线路出现过电压或过电流时,其输出不会成正比的增加,能保护测量仪表设备。关键词:STC12单片机ATT7022计量芯片三相电参数测试RS485通信红外通信AbstractThisschememainlyconsistsofDetectioncircuit,SpecialenergymeteringATT7022chips,STC12,128*64LCDdisplay,key,munication,municationandpower..Thecurrentinthecircuitbycurrentsignal(voltagetransformer,highvoltage(voltage)signalsareconvertedtoelectricitysignal,thesafetyATT7022throughthemeasurementdatatoSCMbysingle-putercontrol,128*64LCDdisplay,andbuttonscanchoosetodisplaymeasureddata,,uracyrequirement,andbecauseoftransformercoretendtosaturation,whenpowerlinevoltageorcurrentappeared,theoutputwillincrease,:STC12MCUATT7022measurementchipThree-phaseelectrical--munication目录第一章绪论....................................................................................................................................................................3第二章三相多功能电表的总体设计..................................................................................................................................................................11第三章硬件设计................................................................................................................................................................................................................................................................................................................................................................................................................................................................................33第四章软件设计.......................
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