基于can总线的远程电力抄表系统设计

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1、摘要现场总线是连接智能现场设备和自动化系统的数字式、双向传输、多分支结构的通信网络。它是计算机技术、通信技术和控制技术高度综合与集成的产物，是一种开放式和分布式的新模式。现场总线已经成为当今自动化领域技术发展的热点之一。CAN(控制器局域网)属于现场总线的范畴，是一种有效支持分布式控制和实时控制的串行通信网络。本文以“基于CAN总线的远程电力抄表系统设计”为主题开展研究。本文所做的工作分为三部分：首先介绍了现场总线，然后详细说明了CAN总线的原理和技术特点，最后在理论分析及仿真研究的基础上进行了智能节点的软硬件设计，包括上位机与CAN接口设计、

2、CAN控制器与CAN控制器接口设计和与智能电表的接口。关键词：现场总线；CAN总线；智能节点；智能电表WWW.ZHULONG.COM筑龙网IAbstractThefieldbusisakindofnetworkwiththecharacteristicofdigitalcommunication,bidirectionaltransmissionandmulti-branchystructuretoconnectintelligentequipmentandautomatizationsystem.Itisthecompositiveprodu

3、ctionofcomputertechnology,communicationtechnologyandcontroltechnology.Itisakindofnewmodewithopen-directanddistributablecharacteristic.Itisafocusofautomatizationdomaininmodemtime.CAN(ControlAreaNetwork)isakindoffieldbuswhichisaserialcommunicationnetwork.Itcanapplyindistributi

4、vecontrolsystemandreal-timecontrol.Thedesignofsystemforlong-distancereadingbasedonCANbus,asanemphasis,isresearchedinthispaper.Therearethreepartsinthispaper.Firstly,weintroducethefieldbus.ThenexplainthetheoryofCANbusandthecharacteristicofitindetail.Inthelast,basedonthetheorya

5、nalysisandsimulationresearch,hardwareandsoftwareofintelligentnodesaredesigned.ThedesignincludestheinterfacebetweenPCandCAN,CANcontroller,theinterfaceofCANcontrollerandtheintelligentelectricitymeter.WWW.ZHULONG.COMKeyword:fieldbus;ControlAreaNetworkBus;intelligentnod;intellig

6、entelectricitymeter.筑龙网II目录摘要································IAbstract·······························II1绪论································11.1引言······························11.2国外现场总线的发展情况·····················11.2.1国外发展概况························11.2.2现有水平及发展趋势··············

7、·······21.3国内现场总线的发展趋势·····················21.4研究该课题的意义························32现场总线概述····························42.1现场总线的发展·························42.1.1自动控制领域的发展过程···················42.1.2现场总线崛起的过程·····················52.2现场总线的特点·························62.3几种有影响的现场总线··

8、····················7WWW.ZHULONG.COM2.4现场总线的技术基础·······················93CA