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1、摘要随着整个社会用电量的剧增，传统电表已经难以完成复杂的电量测量管理任务。本次设计的智能电表以美国炬力公司生产的高性能电量芯片ATT7030A为测量芯片，该芯片是一款高精度的三相电能计量芯片，可以完成三相电能参数的精确测量，且具有三相三线和三相四线转换功能。本设计能够较为容易的转化为工业、民用计量产品，满足计量测试需要。本设计的主要工作包括硬件设计和软件设计两个方面。硬件设计选用AT89S52单片机作为系统处理核心，提高三相智能电度表的多功能化程度；选用X5045作为看门狗电路，完成对CPU运行状态、电源电压等监控；X5045部具有512字节的FL
2、ASH存储器，存储相关参数，做到掉电数据不丢失；通过75LBC184完成485通信功能，传输距离可达到1200米；配置了38KHz的红外发送/接收电路，完成红外抄表功能，传输距离大于4米。软件设计部分主要包括主程序、电量采集子程序、键盘显示子程序、网络通信子程序、红外通信子程序等五部分。本设计经过实验测试，实现了对电能的精确测量、数据存储、数据显示、485通信、红外通信等功能，达到了设计要求，表明本设计方案是正确的。关键字：三相智能电度表；ATT7030A；单片机；红外通信；485通信ABSTRACTWiththeincreasingofsocia
3、lpowerconsumption,traditionalammeterhasbeendifficulttoperformcomplexpowermeasurementmanagement.Thedesignofsmartammeterisbasedonhigh-performancepowerchip—ATT7030A,whichisproducedbyAmericanHitrendtechcompany.Thischipisahigh-precisionthree-phaseelectricitymeasurementchip,whichcan
4、completethree-phasepowerparametermeasurementsprecisely.Besides,ithasathree-phasethree-wireandthree-phasefour-wireconversionfunction.Thisdesignworkcaneasilyintoindustrialandcivilmeasurementproductstosatisfythemeasurementneed.Themainworkofthedesignincludeshardwaredesignandsoftwa
5、redesign.ThehardwaredesignchoosesAT89S52single-chip-computerassystemprocessingcore,improvingthemultifunctiondegreeofthethreephasesmartammeter.TheammeterchoosesX5045aswatch-dogcircuittoachievemonitoringCPUrunningconditionandpowersupplyvoltage.Thereare256bytesofFLASHmemoryinX504
6、5,whichcanstoragerelatedparametersandthedatawillnotlosewhenpowerdown.SystemcompetesRS-485communicationfunctionby75LBC184anditstransmissiondistancebeyond1200meters.Thedesignconfigurations38KHzinfraredTransmit/receivecircuit,tocompleteinfraredreadingfunctionwithtransmissionof4me
7、ters.Thesoftwaredesignmainlyincludesmainprocedure,poweracquisitionprocedure,keyboardanddisplayprocedure,networkcommunicationprocedure,infraredcommunicationprocedure,ECT.Bytheexperimenttest,thedesignachievetheprecisemeasurementoftheelectricalenergy,datastorage,datadisplay,485co
8、mmunication,infraredcommunicationandotherfunctions,satisfying
