温湿度检测及实时时钟硬件设计(双单片机系统)

南京工程学院本科毕业设计（论文）题目：温湿度检测及实时时钟硬件设计专业：自动化班级：自动化031学号：学生姓名：指导教师：起迄日期：2011.3～2011.6GraduationDesign(Thesis)DesignAndSimulationOfIntelligentTrafficSignalControlSystemBySunHaoSupervisedbyAssociateProf.PANQingMingDepartmentofAutomationEngineeringNanjingInstituteofTechnologyJune,2011南京工程学院毕业设计说明书（论文）I摘要论文设计提出了一种基于双单片机系统AT89C52和AT89C2051的新型温湿度检测及实时时钟。通过对设计方案的比较与论证，选择了适合本设计的时钟模块、温湿度检测模块、键盘及显示模块。其中单片机AT89C52和AT89C2051组成双单片机系统，分别完成显示处理及温湿度采样；实时时钟采用DS12887实现年月日时分秒等时间信息的采集；温湿度检测模块采用技术成熟的SHT11芯片作为对车前、车顶和车内的温度及湿度进行实时检测；非编码键盘对实时时间的修改；LED显示温湿度及实时时间；采用7805三端稳压集成芯片稳定输出5V直流电压。通过对双单片机最小系统的原理分析，结合论文的设计要求，完成了系统流程图及系统程序的设计。本设计可实现时间显示、时间的修改、车前、车顶和车内温度及湿度显示等功能。关键词：双单片机系统，SHT11，DS12887,LED显示南京工程学院毕业设计说明书（论文）IIABSTRACTThisthesispresentsatwo-MCUsystembasedonAT89C2051andAT89C52ofanewtemperatureandhumidityMeasurementandreal-timeclock.Throughthecomparisonofdesignanddemonstration,selecttheappropriatemodulesofthedesignoftheclock,temperatureandhumiditydetectionmodule,keyboardanddisplaymodule.AT89C2051microcontrollerandwhichcompositionoftheAT89C52microcontrollersystem,therespectiveprocessinganddisplayoftemperatureandhumiditysampling;toachievereal-timeclockwithyear,month,day,hourDS12887timeinformationsuchasthecollection;temperatureandhumiditydetectionmoduleuseschiptechnologyasamatureSHT11frontofthecar,thecarroofandreal-timedetectionoftemperatureandhumidity;non-codingchangestothekeyboardforreal-timetime;LEDdisplayandrealtimetemperatureandhumidity;Using7805three-terminalregulatorschipoutputDCvoltageof5V.Byanalysistheminimumsystem’principiumofDoubleMCU,combinetherequestofthischaracter,Ifinishedthedesignofsystemflowchartandsystemprogram.Thisdesignenablestimedisplay,timechanges,front,roofandinteriortemperatureandhumiditydisplay.Keywords:DoubleMCUSystems；SHT11；DS12887；LEDDisplay南京工程学院毕业设计说明书（论文）III目录第一章绪论..................................................................................................................11.1引言................................................................................................................................11.2研究背景和意义...........................................................................................................11.3本文的结构...................................................................................................................1第二章系统总体设计方案......................................................................................32.1设计内容........................................................................................................................32.2方案选择........................................................................................................................42.2.1单片机的选择..................................................................................................42.2.2时钟芯片的选择.............................................................................................42.2.3温湿度传感器的选择.....................................................................................42.2.4显示模块的选择..............................................................................................52.2.5键盘模块的选择..............................................................................................5第三章器件及模块的介绍.........................................................................................63.1双单片机作为中央处理器，组成最小系统.........................................................63.2时钟模块的设计及原理...........................................................................................113.3温湿度检测的设计及原理.......................................................................................153.4LED数码管显示电路................................................................................................173.5键盘控制电路的设计..............................................................................................213.6电源电路的设计........................................................................................................213.7系统总体硬件设计原理图.......................................................................................22第四章Protel99SE软件简介...............................................................................234.1Protel99SE软件的介绍....................................................................................234.2Protel99SE原理图编辑....................................................................................244.3电路板的设计..........................................................................................................25第五章硬件调试.............................................................................................................27第六章总结.........................................................................................................................286.1论文总结....................................................................................................................286.2感想.............................................................................................................................28致谢..............................................................................