IC卡蒸汽预付费控制器的设计

摘要I摘要为了适应国家的用蒸汽制度的改革，缓解蒸汽部门因先用汽后付费所带来的资金紧张，研究和利用现代智能技术，实现自动供汽势在必行。智能控制器的推广，不仅可以提高蒸汽供应管理部门的工作效率，并在技术上，为节省蒸汽，合理的利用蒸汽创造了条件。本论文是一个关于智能蒸汽预付费控制器的研究，是基于单片机的一种应用和发展。本设计是一单片机为核心，通过单片机读取IC卡的数据并进行处理，并控制外接阀门控制电路，以达到控制供应蒸汽的目的。本论文首先介绍了IC卡的历史和现状，阐述了设计IC卡控制器的关键技术，然后介绍了IC卡的结构和特点，工作原理。再次是详细阐述了包括IC卡读写电路、阀门控制电路、键盘电路、电源电路等在内的硬件电路，最后详细阐述了软件设计部分。关键字：IC卡蒸汽预付费控制器单片机AbstractIIAbstractInordertoadapttothereformofthecountry'ssteamsystem,andtoeasethecompany'sfundspressurebecauseofthemethodthatonewillpayforthemoneyafterusethesteam,researchingandusingthemodernintelligenttechnologiestoachieveautomaticsteamsupplyisimperative.Thepromotionoftheintelligentcontrollercannotonlyimprovetheworkefficiencyofthesteamsupplymanagement,butalsocreatetheconditionsinordertosavesteam,toreasonablyusethesteam.Thispaperisastudybasedonanintelligentsteamprepaidcontrollerandbasedontheapplicationanddevelopmentofamicrocontroller.Thecoreofthedesignisamicrocontroller,thenthemicrocontrollerreadsandprocessestheICcarddata,andcontrolsanexternalvalvecontrolcircuit,andtoreachthegoalofcontrollingthesupplyofsteam.Firstly,thispaperdescribedthehistoryandcurrentstatusoftheICcard.Andsecondly,itexplainedthekeytechnologyofthedesignoftheICcardcontroller,andthendescribedthestructureandcharacteristicsandtheworkingprincipleoftheICcard.Thirdly,itelaboratedhardwarecircuitincluding,ICcardreadingandwritingcircuit,thevalvecontrollingcircuit,thekeyboardcircuit,powercircuit.Finally，thepaperelaboratedthedesignofsoftware.Keywords:ICcardPrepaymentsteamcontrollerMicrocontroller目录III目录摘要...................................................................................IAbstract...............................................................................II第一章绪论.........................................................................11.1选题背景及意义............................................................................11.2IC卡历史及现状.......................................................................11.3IC卡预付费控制器关键技术..........................................................21.4IC卡预付费控制器的功能..........................................................21.5设计的技术指标............................................................................31.6本论文的主要内容.........................................................................3第二章方案论证与选择..........................................................42.1总体方案设计选择.........................................................................42.2模块电路方案选择.........................................................................62.2.1时钟电路方案选择...............................................................62.2.2阀门驱动电路选择...............................................................7第三章硬件设计...................................................................83.1智能控制器的主系统.....................................................................83.2核心芯片........................................................................................83.3IC卡读写电路.............................................................................83.3.1IC卡概述.............................................................................83.3.2IC卡的读写技术................................................................93.3.3工作原理.............................................................................103.3.4SLE4442的电路时序分析....................................................11目录IV3.3.5IC卡与单片机的连接........................................................123.4液晶显示电路..............................................................................123.5阀门控制电路..............................................................................133.6实时时钟芯片接口电路................................................................173.7电源电路.......................................................................................183.8报警电路......................................................................................193.9键盘电路......................................................................................193.10串口通讯电路............................................................................203.10.1单片机与流量积算议的通讯..........................................203.10.2单片机与pc机的通讯...................................................223.11硬件电路综述.............................................................................24第四章软件设计及部分程序流程..............................................264.1系统软件开发调试环境...............................................................264.2程序设计概述...............................................................................264.3主程序..........................................................................................274.4电源电压检测程序.......................................................................274.5IC卡读写程序..............................................................................284.6Modbus协议...............................................................................29结论.................................................................................31参考文献...............................................................