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》由会员分享,可在线阅读,更多相关《多功能数字电能表的设计文档格式.doc(66页珍藏版)》请在冰豆网上搜索。
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..................................