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1、多功能智能电表的设计摘要目前，电力系统中仪器仪表已经进入了自动化和智能化的时代。自动化和智能化特性不仅要求这些仪器仪表像传统计量表一样具有计量功能，而且还要具有测量、保护、控制、通信等多种功能，以反映电气元件运行状态和控制调节的信息。随着高新技术尤其是电子信息技术的快速发展，电子式、多功能、高精度、多费率、自动抄表等产品的优势突显，且已逐步成为电能表发展的主流。国内仪器制造设计的电能表主要有远程监测仪表，手持式仪表，便携式多功能分析仪表。而在技术解决方案中，传统的单片机不能满足多功能而且精度低，
2、不适用于信息交互高速实时处理场合。智能电表具有数据保护，报警，断电显示，负荷控制，防窃电，远程抄表等功能。从计量到数据处理都采用以集成电路为核心的电子器件，从而取消了电表上长期使用的机械部件，随着智能化电表的发展，将最终取代传统电表在用户中的使用。本文主要应用AT89C52单片机，RS485通讯各个单元来完成数据的传输，费率的计算，数据的显示，报警，远程抄表控制，使电表实现智能化。关键词：智能电表；自动抄表；RS485通信；预付费；智能化IIIDesignonMultifunctionalSma
3、rtMeterAbstractAtpresent,thepowersysteminstrumentationhasenteredtheeraofautomationandintelligent.Automationandintelligentfeaturenotonlyrequiretheseinstrumentsthesameasthetraditionalmeasurementmetermeasurementfunction,butalsowiththemeasurement,protect
4、ion,control,communicationsandotherfunctionsinordertoreflecttheoperationalstatusandcontrolofelectricalcomponents,regulationofinformation.Alongwiththehightechnologyandnewtechnologyelectronicinformationtechnology’sfastdevelopment,theelectronicformula,mu
5、ltifunction,thehighaccuracy,themulti-tariffs,copiesproductandsoontablesuperioritytounderlineautomaticallyparticularly,andalreadygraduallybecametheelectricalenergytabledevelopmentthemainstream.Designofdomesticequipmentmanufacturersareremotemetermonito
6、ringinstruments,handheldinstruments,portableandmultifunctionalanalysisinstruments.Inthetechnicalsolution，thetraditionalsinglechipcannotmeetthemulti-functionandlowprecision,high-speedinformationexchangedoesnotapplytoreal-timeprocessingapplications.The
7、intelligentelectricinstrumenthasthedataprotection,thewarningfunction,thepowerfailuredemonstration,theloadcontrol,againststealstheelectricworkenergy,long-distancecopiesfunctionsandsoontablesystem,usestaketheintegratedcircuitfromthemeasurementtotheproc
8、essingasthecoreelectronicdevice,thushascanceledontheelectricinstrumentthelong-termusemechanicalpart,alongwiththeintellectualizedelectricinstrument’sdevelopment,willsubstitutefortraditionalelectricinstrumentinuserpracticalfinally.InthisdisserttheIIIha
