基于单片机控制的电子秤设计摘要：单片机作为这个设计的首要构件，运用编程语言进行软件的设计。经过议定测量传感器信号和信号放大,然后通过A/D转换系统将提供一个信号提供给系统的CPU，通过LCD屏显示数据,键盘输入系统输用来执行操作指令,超量程阈值时，电子报警系统控制不妨防止损坏电子秤,达成电子秤的基本效用,易于运用,直观,测量准确,并以低廉的成本满足现代社会发展的需要。系统利用单片机AT89S52作为主控芯片，核心包括称重电路，显示电路，报警电路，键盘电路等变成系统电路板，从而有自动称重百般控制效用。关键词:电子称,单片机AT89S52,称重传感器,A/D转换器1ElectronicdesignbasedonsinglechipmicrocomputercontrolAbstract：Astheprimarycomponentofthisdesign,themicrocontrollerusestheprogramminglanguagetodesignthesoftware.Afterthemeasurementofthesensorsignalandsignalamplification,theA/DconversionsystemwillprovideasignaltotheCPUofthesystem,displaythedatathroughtheLCDscreen,andthekeyboardinputsystemwillbeusedtoexecutetheoperationcommand.Whentheoverrangethresholdisused,theelectronicalarmsystemControlmaypreventdamagetotheelectronicscale,achievethebasicutilityoftheelectronicscale,easytouse,intuitive,accuratemeasurement,andmeettheneedsofmodernsocialdevelopmentatalowcost.ThesystemusesthesinglechipAT89S52asthemaincontrolchip,andthecoreincludestheweighingcircuit,thedisplaycircuit,thealarmcircuit,thekeyboardcircuitandtheliketobecomethesystemcircuitboard,sothatthereisautomaticcontrolofvariouscontroleffects.Keywords：electronicscale,AT89S52,loadsensor,A/Dconverter,2目录第1章绪论........................................................41.1电子秤的组成以及工作原理......................................41.2设计思路......................................................4第2章系统方案论证与选型...........................................62.1CPU的选择方案.................................................62.2传感器的选择..................................................62.3放大电路的选择方案............................................72.4A/D转换器的选择..............................................82.5显示器一面的选择..............................................82.6超量程报警一面选择............................................8第3章硬件电路设计...............................................83.1.AT89S52各引脚效用介绍......................................93.2A/D转换器与AT89S52单片机接口电路设计.......................103.3显示电路与AT89S52单片机的接口电路设计........................133.4键盘电路与AT89S52的接口电路设计..............................143.5报警电路的设计...............................................15第4章系统软件设计................................................174.1主程序设计...................................................174.2子程序设计...................................................194.2.1A/D转换启动及数据读取程序设计............................194.2.2数制转换子程序设计........................................194.2.3显示子程序设计............................................204.2.4键盘扫描子程序的设计......................................214.2.5报警子程序设计............................................22总结..............................................................24致谢.............................................................25参考文献........................................................26附录..............................................................283第1章绪论1.1电子秤的组成以及工作原理电子称是利...
