基于单片机的温湿度采集系统(数据上传)

南京工程学院毕业设计说明书(论文)作者：李瑞楠学号：系部：电力工程学院专业：题目：基于单片机和显示屏的小型工控系统（单片机部分）指导者：副教授(姓名)(专业技术职务)评阅者：(姓名)(专业技术职务)2013年6月南京毕业设计说明书（论文）中文摘要本次设计主要是围绕现代工业过程中比较常见的温度湿度采集与检测的技术展开，主要是利用单片机和传感器实现对温度湿度的检测。对此，首先研究温度湿度的测量原理并对检测电路进行分析，然后在此基础上对单片机和主要芯片进行选择，并进行软件的编程，实现在精度范围内的温度湿度信号的监测和处理并上传数据到显示屏。为了实现实时监控，最后还要对通讯进行严格的设计，保证与显示屏能够实现及时通讯。在设计思路完成后，接着对硬件进行连线和调试，传感器采用DALLAS公司的DS18B20数字温度传感器和电阻式湿敏传感单元，实现温度和湿度数据采集。最后上传数据到显示屏，实现数据的实时显示和分析。关键词：温度湿度单片通信显示屏南京工程学院毕业设计说明书（论文）毕业设计说明书（论文）外文摘要TitleTheDesignofSmallIndustrialControlSystemBasedonMCUandLCDAbstractThisdesignmainlyisrevolvesaroundcommoninmodernindustrialprocesstemperaturehumidityacquisitionanddetectiontechnology,mainlyusingsinglechipmicrocomputerandsensorfordetectionoftemperaturehumidity.Thefirsttemperaturehumiditymeasuringprincipleandthedetectioncircuitisanalyzed,thenbasedontheSCMandthemainchipselection,andthesoftwareprogramming,toachievetheaccuracyoftemperaturehumidityintherangeofthesignalmonitoringandhandlinganduploaddatatothedisplay.Finally,inordertorealizereal-timemonitoringtostrictdesignofcommunications,assuranceandscreenscanachievetimelycommunication.Aftercompletionofthedesignidea,andthentoconnectionanddebuggingofthehardware,thesensorDS18B20digitaltemperaturesensorbyDALLAScompanyandresistivehumidity-sensitivesensingunit,temperatureandhumiditydataacquisition.Finallytouploaddatatothedisplayscreen,realizingtherealtimedatadisplayandanalysis.KeywordsTemperatureHumidityMCUCommunicationLCD南京工程学院毕业设计说明书（论文）目录前言.....................................................................................................................................................1第一章.系统结构设计........................................................................................................................31.1．总体结构设计........................................................................................................................31.2．温度采集系统设计................................................................................................................31.2.1．温度传感器的选择...............................................................................................................31.2.2．温度检测电路......................................................................................................................41.3．湿度检测系统设计................................................................................................................51.3.1．湿度传感器的选择...............................................................................................................51.3.2．湿度检测电路设计...............................................................................................................51.4.通信系统设计...............................................................................................................................61.4.1．接口定义..............................................................................................................................61.4.2.通信参数..............................................................................................................................71.5.下位机显示系统...........................................................................................................................8第二章.系统硬件组成.............................................................................................................................92.1.单片机选型................................................................................................................................92.1.1.STC89C52单片机主要特性与功能....................................................................................92.2.DS18B20特性及其使用方法....................................................................................................122.2.1.DS18B20的主要特性..........................................................................................................132.2.2.DS18B20的内部结构..........................................................................................................142.2.3.DS18B20的操作时序..........................................................................................................172.2.4.DS18B20的供电方式..........................................................................................................182.3.PCF8591AD/DA转换器............................................................................................................192.3.1.PCF8591主要特点...........................................................................................................202.3.2.PCF8591功能介绍...........................................................................................................202.4.74HC573八进制3态非反转透明锁存器................................................................................222.5.LED数码管原理.......................................................................................................................23南京工程学院毕业设计说明书（论文）2.5.1.LED数码管介绍...............................................................................................................232.5.2.LED显示方式...............................................