基于单片机的智能电子秤设计

本科毕业设计基于单片机的智能电子秤设计DesignofintelligentelectronicscalebasedonMCU学院：电子工程学院专业班级：电子信息工程DZ电子091班学生姓名：孙昕学号：2011140603指导教师：韩晓春（高级实验师）2013年6月毕业设计中文摘要基于单片机的是能电子秤设计摘要：伴随着广泛应用的微电子技术，人们对电子秤的要求越来越高。本电路的控制核心为AT89S52单片机，和称重电路，显示电路，键盘电路一起构成的智能称重系统，自动称重系统，以实现各种不同的控制功能。这个系统是为了电子称的称重、计算价格还有数据处理进行钻研的。为了详细说明如何用单片机对采样的数据进行处理，本实验研究了对数据采集、转换、计算等问题。并且讨论了单片机系统中最重要的计算问题，讨论的结果表明用本系统用软件设计的话将会是系统更加完美。本文给出了智能电子硬件设计，详细的分析了基础上已知软件的电子控制方法。可以说，本设计完成的电子秤在最大程度上满足了应用的需求。本设计中的电子秤有很多特点，如功耗低、性价格比高、简单方便的系统设计、速度快、测量的数据准确等特点。因为单片机控制的电子称不仅构造一目了然，而且制造的资金也很少，因此大部分的人们都很喜爱，本文将对于这些进行详细讨论。关键词:AT89S52，压力传感器，单片机，A/D转换毕业设计外文摘要DesignofintelligentelectronicscalebasedonMCUAbstract:Withtheextensiveapplicationofmicroelectronicstechnology,peoplehavebecomeincreasinglydemandingelectronicscales.ThecoreofthecontrolcircuitfortheAT89S52microcontroller,andweighingcircuit,displaycircuit,keyboardcircuittogetherconstitutetheintelligentweighingsystem,automaticweighingsystem,inordertoachieveavarietyofcontrolfunctions.Thissystemisknownforelectronicweighing,calculatingpriceshavetodelveintothedataprocessing.Fordetailedinstructionsonhowtousemicrocontrollersampleddataprocessing,thisexperimentalstudyondataacquisition,conversion,calculationandotherissues.SCMsystemanddiscussesthemostimportantcalculationdiscussedresultsshowthesystemusedwiththesoftwaredesign,thenthesystemwillbemoreperfect.Inthispaper,intelligentelectronichardwaredesign,basedonadetailedanalysisoftheelectroniccontrolmethodknownsoftware.Itcanbesaid,thedesigniscompletedelectronicscalestothemaximumextenttomeettheapplicationrequirements.Thedesignoftheelectronicscalehasmanycharacteristics,suchaslowpowerconsumption,sexualpriceishigh,thesystemdesignissimpleandconvenient,fast,andaccuratemeasurementdatacharacteristics.Becausemicroprocessorcontrolledelectronics,saidnotonlyconstructaglance,andmadeverylittlemoney,somostofthepeoplewerelike,thisarticlewilldiscusstheseindetail.Keywords:AT89S52；pressuresensor；microcontroller；A/Dconversion目录1.绪论..............................................................41.1电子秤的发展现状和发展趋势.....................................................................41.2项目研究的意义............................................................................................51.3可行性分析....................................................................................................52.系统方案论证与选型................................................52.1设计要求.........................................................................................................52.2整体功能........................................................................................................62.3电子秤的工作原理........................................................................................62.4总体设计方案.................................................................................................73.系统硬件设计.....................................................73.1单片机概述.....................................................................................................73.2AT89S52单片机简介.....................................................................................73.3最小系统电路................................................................................................93.4键盘电路......................................................................................................103.5时钟电路......................................................................................................133.6液晶显示电路..............................................................................................133.7压力感应电路...............................................................................................153.8电源电路......................................................................................................183.9本章小结.......................................................................................................194系统软件设计.....................................................194.1编程语言及开发工具的选择......................................................................194.2主程序设计..................................................................................................194.3显示模块流程图及子程序的设计...............................................................214.4按键处理程序..............................................................................................224.5本章小结.......................................................................................................235系统仿真及调试...................................................235.1ProteusISIS简介[8]..................................................................................235.2keil简介.....................................................................................................245.3出现的问题和解决方法...............................................................................245.4keil与proteus联合仿真及调试.............................................................255.5本章小结......................................................................................................28致谢..........................................