多功能数字电能表的设计文档格式.doc

多功能数字电能表的设计文档格式.doc

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该系统主要由显示模块、键盘模块、时钟模块、存储模块、通讯模块、CPU模块、CS5460电能表计量芯片模块和前端电路调理模块八部分组成。

前端电路调理模块采用2mA/2mA的电流互感器和5A/2.5mA电流互感器和精密电阻实现对市电的转换，并采用RC滤波网络滤波，然后采用由美国CRYSTAL公司的新型电能计量芯片CS5460芯片实现对电流、电压和电能的测量与转换；

时钟模块采用DS1302时钟芯片为系统提供时钟基准，存储模块采用AT24C16，为系统提供数据存储；

显示模块用OCMJ4X8CM液晶，通信模块采用Max232芯片，并利用AT89S52组成的CPU模块控制所有芯片的工作、测量、计算电能，送往显示模块和存储模块进行实时显示和存储，并通过标准RS-232接口送往PC上位机进行同步显示，并且本电能表还设有GPIB地址，以便于电能管理系统对电能的管理。

关键词CS5460；

AT89S52；

MAX232通讯；

OCMJ4X8CM

-I-

Abstract

AlongwiththerapiddevelopmentofChina'

seconomy,powerconsumption,increasingpowerbecomesthemodernsocietyofnationaleconomyandpeople'

slifeimportantguarantee.Becausethedegreeofthesingle-phasewatt-hourmetermeasureishigh,lowcostadvantageinChinabegantograduallyspreadtheuseofit.Developedsofar,themeasurementcircuittechnologyalreadyfromtheanalogcircuitimproveontime-multiplierfordigitalmultiplieranotheronecircuit,themarketsharehasamountedtomorethan60%.Intheinternationalmarket,China'

sproductionofsingle-phasewatt-hourmeterwithstrongcompetitivenessandwideprospectofmarket.

Thisarticlesummarizesthedevelopmentofsingle-phasewatt-hourmeteranddemand;

thispaperintroducestheprincipleofsingle-phasewatt-hourmeterandadvantages,andputsforwardthedesignschemeofsingle-phasewatt-hourmeter.

Thissystemismainlyrevealedthemodule,keyboardmodule,clockmodule,storemodule,communicatemodule,CPUmodule,CS5460electricenergymeterchipmoduleandfrontcircuitlookafterthepartofthemoduletomakeup.Thefrontcircuitrecuperatesthemoduleandadoptselectriccurrentmutualinductorand5A/2.5mAelectriccurrentmutualinductorandaccurateresistanceof2mA/2mAtorealizetheconversionofthecityelectricity,andadoptRCtostrainthewavenetworkandstrainthewave,thenadoptmeasurechip,CS5460ofchip,realizetoelectriccurrent,voltage,measurementandconversionofelectricenergybynewelectricenergyofCompany,CRYSTALofU.S.A.;

TheclockmoduleadoptsDLS1302clockchiptooffertheclockbasisforsystem,storesthemoduleandadoptsAT24C16,offerthedataforsystemtostore;

RevealthemoduleusesOCMJ4X8CMliquidcrystal,thecommunicationmoduleadoptsMax232chip,andutilizeCPUmodulethatAT89S52makesuptocontroltheworkofallchips;

Measure,calculateelectricenergy,sendtoisshownthemoduleandstoresthemoduleandpaysrevealingandstoringinrealtime,sendPCtolocationplanegoonrevealandthiselectricenergymeterhaveGPIBaddressalsosynchronouslythroughstandardRS-232interface,sothatthecontroloverelectricenergyofadministrativesystemofelectricenergy.

KeywordsCS5460;

AT89S52;

232communication;

OCMJ4X8CM

-II-

目录

摘要……………...............................................................................................................IAbstract....................................................................................................................…….II

第1章绪论.................................................................................................................1

1.1课题背景.............................................................................................................1

1.2研究目的与意义.................................................................................................2

1.3电子式电能表的发展及技术优势......................................................................3

1.4论文研究内容......................................................................................................4

第2章总体方案设计.................................................................................................52.1单相电子式电能表的工作原理........................................................................5

2.2设计功能要求......................................................................................................5

2.3系统的整体设计方案..........................................................................................5

2.3.1电能计量部分................................................................................................6

2.3.2前端调理电路部分......................................................................................10

2.3.3主控芯片......................................................................................................11

2.3.4显示部分........................................................................................................11

2.3.5通信模块.......................................................................................................13

2.3.6时钟模块.....................................................................................................13

2.3.7存储部分..................................