基于单片机的温湿度采集系统

毕业设计（论文）题目基于单片机的温湿度采集系统系（院）专业班级学生姓名学号指导教师职称二〇一二年六月十八日2独创声明本人郑重声明：所呈交的毕业设计(论文)，是本人在指导老师的指导下，独立进行研究工作所取得的成果，成果不存在知识产权争议。尽我所知，除文中已经注明引用的内容外，本设计（论文）不含任何其他个人或集体已经发表或撰写过的作品成果。对本文的研究做出重要贡献的个人和集体均已在文中以明确方式标明。本声明的法律后果由本人承担。作者签名:二〇一〇年六月一十八日毕业设计（论文）使用授权声明本人完全了解滨州学院关于收集、保存、使用毕业设计（论文）的规定。本人愿意按照学校要求提交学位论文的印刷本和电子版，同意学校保存学位论文的印刷本和电子版，或采用影印、数字化或其它复制手段保存设计（论文）；同意学校在不以营利为目的的前提下，建立目录检索与阅览服务系统，公布设计（论文）的部分或全部内容，允许他人依法合理使用。（保密论文在解密后遵守此规定）作者签名:二〇一〇年六月一十八日3基于单片机的温湿度采集系统摘要随着科技的发展，单片机技术已经进入我们的工作、科研和生活中，为我们的社会做出了巨大的贡献，一切向着数字化控制，智能化控制方向发展。本设计就是以单片机（AT89S52）为核心，配合温度传感器（AD590）和湿度传感器(HIH-3610)，以及相关的外围电路组成的检测系统，从而达到监控环境温度和湿度的目的。本系统可以实时接收所测环境的温度和湿度信号，通过温度和湿度传感器得到测量信号，经传感器转换为电信号，然后通过一定的放大经过芯片TLC549A/D转换送到单片机进行数据处理。所有的测量操作都是在硬件基础上通过控制软件来实现，经软件分析处理后送LED显示装置进行显示。本系统包括系统硬件和软件设计,经仿真验证表明，本系统可靠性高，结构简单，实现了对温湿度的自动调节。经过适当的改进，本系统一定工业生产、环境检测方面有着广泛的应用前景。关键词：AT89S52单片机，温度传感器，湿度传感器，A/D转换，LED显示4ThetemperatureandhumiditymeasurementsystembasedonsinglechipmicrocomputerAbstractWiththedevelopmentofscienceandtechnology,computertechnologyhasenteredintoourwork,scientificresearchandlife,foroursocietytomakeenormouscontribution,alltowardsthedigitalcontrol,intelligentcontroldirection.Thedesignisbasedonthesinglechipmicrocomputer(AT89S52)asthecore,withthetemperaturesensorandthehumiditysensor(AD590)(HIH-3610),andrelatedperipheralcircuitsofthedetectionsystem,canreceivethemeasurementofenvironmentaltemperatureandhumiditysignals,thetestingpersonnelcanthroughthedigitaltubedisplaydata,real-timemonitoringoftheenvironmentaltemperatureandhumidityconditions.Allmeasurementoperationscanbecontrolledthroughahostsoftware,temperatureandhumiditysensormeasuringsignal,thecircuitisconvertedtoelectricalsignals,thenthroughcertainamplificationbyTLC549A/Dconversionchiptothesingle-chipmicrocomputerfordataprocessing,theprocessingfortheanalysissoftwareofevacuationofdisplaydevice.Thesystemincludesthesystemhardwareandsoftwaredesign,highreliability,simplestructure,realizestheautomaticregulationoftemperatureandhumidity.SystemisusedRS232andPCconnected,cansetupautomaticrecordingoftemperature,humidityoftherelevantparameters,butalsocanbesetatacertaintimeautomaticrecording,availableinmeteorologicalobservation.Keyword:AT89S52SCM,temperaturesensors,humiditysensors,A/Dconversion,LEDdisplay5目录前言······································································································1第一章仿真软件简介················································································21.1PROTEUS····························································································21.1.1PROTEUS的功能特点·····································································8第二章系统总体设计方案········································································102.1温湿度测控的方法及元器件的选定························································102.1.1器件的选定·············································································102.2设计的总体方案及其意义····································································112.2.1总体设计················································································11第三章系统硬件设计方案········································································123.1主控制电路和测温时控制电路······························································123.1.1主控制电路···············································································123.1.2测温时控制电路·········································································133.1.3系统相空间轨迹分析···································································133.2主要模块的电路·················································································153.2.1蜂鸣器电路·················································································3.2.2晶振电路··················································································153.2.3显示电路··················································································163.2.4传感器电路···············································································173.2.5复位电路··················································································17第四章系统软件设计方案结论··································································234.1系统流程图··························································································4.1.1按键检测的流程图··········································································4.2编程思想·····························································································4.3源程序································································································结论········································································································参考文献··································································································英文翻译6前言温度和湿度与人们的生活息息相关，在工农业生产，气象，环保，国防，科研等部门，经常需要对环境温度及湿度进行测量，准确测量温湿度在生物制药，食品加工，造纸等行业更是至关重要的，传统的温度计是用水银显示的，虽然结构简单，价格便宜，但是精度不高，而且不易计数，但是采用单片机进行控制，不仅具有控制方便，简单灵活等优点，而且可以大幅度提高温度控制的技术指标，用LCD显示起来会更加的直观方便。采用DHT11数字温湿度传感器作为检测元件，能够同时检测温度和湿度，它不仅仅易于焊接，而且只有四个管角，减少了外围电路的设计。DHT11传感器包括一个电容式聚合体测湿原件和一个能隙式测温元件。DHT11能够直接独处被