基于单片机的多点即时测温系统设计

河南城建学院本科毕业设计（论文）摘要I摘要本系统由上位机和下位机两部分组成。下位机实现的是温度的测量并提供了标准RS232通信接口，芯片使用了AT89C51单片机和DS18B20数字温度传感器。上位机部分实现数据的实时显示和存储，使用了通用PC。系统以单片机AT89C51为核心，以4个DS18B20数字温度传感器作为测量元件，对温度进行测量,收集数据。这个系统还要完成数据的实时显示、存储等功能。上位机与下位机之间采用RS232总线通讯，单片机将温度数据发送到监控计算机中，计算机将收到的数据进行记录和处理，并进行实时显示。此次设计在Keil环境下编辑应用软件程序，通过Proteus和Keil联合实现该系统的设计、调试和仿真。本系统设计实现了在多点温度测量系统中对多个传感器的快速精确识别和处理，并给出了具体的编程实例、仿真结果和实物装置。关键词：单片机，DS18B20数字温度传感器，Proteus仿真河南城建学院本科毕业设计（论文）AbstractIIAbstractThissystemiscomposedofupperandlowermachineiscomposedoftwoparts.LowermachinetemperaturemeasurementandprovidestandardRS232communicationinterface,usedchipAT89C51andDS18B20digitaltemperaturesensor.Partofthehostcomputertorealizereal-timedisplayanddatastorage,theuseofgeneralPC.SystembasedonAT89C51SCMasthecore,withfourDS18B20digitaltemperaturesensorasmeasuringelement,isconnectedtotheSCMandsensor,collection,storagetemperaturesensormeasurementdata.IntheSCMsystem,real-timedisplayanddatastoragefunction,auxiliarystoragedatabutalsotoachievetheprogram.Ontheotherhand,theSCMcommunicateswiththecomputerviaRS232bus,transmissionofdatawillbecollectedtothemonitoringcomputer,thecomputermonitoringandcontroltheSCMtransmissionofdatarecording,storing,processing,forstafftobrowse,recordingandprocessing.AndintheKeilenvironmenteditorapplicationsoftware,design,debuggingandSimulationofthemultipointtemperaturemeasurementsystemisrealizedthroughthecombinationofProteusandkeil.Designofthesystemisrealizedinmultipointtemperaturemeasurementsystemofmultiplesensorstoquicklyandaccuratelyidentifyanddealwith,andgivesthespecificprogrammingexamplesandsimulationresults.Thesystemfeaturessimpleinterface,highprecision,stronganti-interferenceability,stablework.Keywords:SCM,digitaltemperaturesensorDS18B20,Proteussimulation河南城建学院本科毕业设计（论文）目录目录摘要...................................................................................................................................IAbstract..........................................................................................................................II1绪论................................................................................................................................11.1选题的背景与意义.............................................................................................11.2国内外研究现状.................................................................................................11.2.1国内研究现状..........................................................................................11.2.2国外研究现状..........................................................................................21.3系统主要研究的内容.....................................................................................22系统设计........................................................................................................................32.1基于单片机的多点即时测温系统的功能设计..........................................32.2基于单片机的多点即时测温系统设计的原则..........................................32.3基于单片机的多点即时测温系统的组成与工作原理..................................43单片机的有关介绍........................................................................................................53.1单片机的定义.....................................................................................................53.2单片机的基本结构.............................................................................................63.3单片机执行指令的过程.....................................................................................73.4单片机的特点.....................................................................................................74温度传感器研究、选型................................................................................................84.1温度传感器选用细则..................................................................................84.2温度传感器方案论证和选择.....................................................................84.3DS18B20温度传感器.......................................................................................104.3.1主要特征................................................................................................104.3.2引脚功能................................................................................................114.3.3工作原理及应用....................................................................................114.3.4单片机对DS18B20的操作流程............................................................114.3.5DS18B20与单片机的接口....................................................................124.3.6DS18B20芯片ROM指令表....................................................................124.3.7DS18B20芯片存储器操作指令表........................................................134.3.8DS18B20复位及应答关系及读写隙....................................................135硬件设计......................................................................................................................155.1概述................................................................................................................155.2测温系统设计...................................................................................................155.3显示系