文档介绍:以AD637为基础的交流毫伏表设计毕业论文以AD637为基础的交流毫伏表设计以AD637为基础的交流毫伏表设计摘要在电量的测量中,电压,电流和频率是最基本的三个被测量。其中,电压量的测量最为经常。而且随着电子技术的发展,更需要测量弱电的电压,所以毫伏电压表就成为一种必不可少的测量仪器。另外,由于数字式仪器具有读数准确方便,精度高,误差小,灵敏度和分辨率高,测量速度快等特点,而倍受用户青睐。本系统以交流毫伏表为核心,以低功耗单片机MCS-51为主控制器,通过数据采集系统采集数据,经设有运算放大电路和微型继电器的衰减模块输出,经衰减放大处理的模拟信号,其中一路信号通过真有效值直流(RMS-DC)变换,经12位快速逐次比较式A/D转换器AD574芯片转换,实时把模拟量转化为数字量,经CPU进行计算、处理后,由七段数码LED显示出来,最终实现对被测输入信号的电压值显示测量。关键词单片机数字交流毫伏表真有效值ITheAD637-basedexchangemVtabledesignAbstractInthemeasurementofelectricity,voltage,,,withthedevelopmentofelectronictechnology,butalsotheneedforweakmeasurementsofvoltage,,uratereadingswithhighprecision,smallerror,highsensitivityandresolutiontomeasurethecharacteristicsofspeed,,low-powersingle-puter-basedMCS-51controller,dataacquisitionsystemthroughdatacollection,theoperatorhasamicro-amplifierandtheattenuationoftherelayoutputmodule,withattenuationenlargeanalogsignalprocessing,inwhichthesignalallthewaythroughtheDCTrueRMS(RMS-DC)conversion,parisonfastA/DconverterconversionAD574chip,real-timeanalogtodigitalconversionfor,calculatedbytheCPUandprocessed,bytheSeven-SegmentLEDdigitaldisplay,-puterDigitalACMillivolII目录摘要.................................................................................................................................IAbstract.............................................................................................................................II1绪论.................................................................................................................................12单片机.......................................................................................................................................