苏州信息职业技术学院毕业设计报告（论文）系别：通信与电子系专业：汽车电子班级：学生姓名：学生学号：设计（论文）题目：预收费煤气表的设计指导教师：起讫日期：毕业设计报告（论文）摘要预收费煤气表的设计摘要：目前使用的机械式煤气表存在较大的弊端，给管理部门和用户带来了很大的不方便，为了能从根本上解决此问题，设计一种新型的智能煤气表收费系统就显得十分必要。针对这种情况，本文设计了智能IC卡煤气表系统，以实现煤气收费管理的电子化和信息化。本设计是基于AT89S52单片机控制的煤气计费模块，控制简单，设计中采用非接触式智能卡模块实现预付费功能，具有严谨的保护和防作弊功能；系统具备液晶显示功能，利用RT1602液晶显示模块显示余额、用气量等数据；为了保证系统的稳定性和可靠性，该设计中还加入了掉电保护模块，保护用户数据不丢失，使计费系统实现自动化和最优化。关键词：煤气表,非接触式卡,预付费,单片机毕业设计报告（论文）摘要(Thesis)Title:YuShouFeiMeiQiBiaodesignThemechanicalgasmeteratpresenthasabigdisadvantagestothemanagementandtheusersagreatdealofinconvenience.Inordertofundamentallysolvethisproblem,itisverynecessarytodesignanewtypesystemofintelligentgasmeter.Inviewofthissituation,thispaperdesignedanintelligentICcardgasmetersystemsinordertoachievethegastariffsandthemanagementofelectronicinformation.ThedesignisagasbillingmodulewhichbasedontheMCUAT89S52,thecontrolissimple,thedesigntakethenon-contactlesssmartcardmoduletoachievepre-paidfunctions,withhavestrictprotectionandanti-cheatfunctions.SystemusetheRT1602-liquidcrystaldisplayfunctiontoshowtheBalancedataetc.Inordertoensuresystemstabilityandreliability,thedesignalsojoinedthepower-downprotectionmoduletoprotecttheuserdataisnotlost,makethesystemenablesautomatedbillingsystemandoptimization.Keywords:Gasmeter,Non-contactcard,Prepaid,Single-chip目录摘要.......................................................1第一章绪论..................................................51.1煤气表的发展............................................61.2煤气表收费方式..........................................61.2.1煤气表的发展..........................................61.2.2收费方式..............................................81.3设计目的................................................71.4设计中需要重点解决的问题................................9第二章系统软件设计方案......................................102.1系统组成................................................102.2整体方案论述...........................................10第三章单元电路..............................................113.1主控电路MCU............................................123.1.1主控芯片介绍.........................................123.1.2主控电路.............................................123.2流量测量模块...........................................143.3显示电路...............................................153.3.1RT1602介绍...........................................153.3.1.1RT1602引脚说明.....................................153.3.1.2RT1602指令说明.....................................163.3．13RT1602的读写时序...................................173.3.2LCD接口电路..........................................183.4掉电储存模块...........................................193.4.1I的平方C总线的基本原理..............................193.4.2AT24C02介绍..........................................213.4.3AT24CO2硬件电路连接..................................223.5智能IC卡接口模块......................................233.5.1MifareS50卡介绍.......
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