基于单片机的室内环境监控系统设计

中文题目：基于单片机的室内环境监控系统设计外文题目：DESIGNOFINDOORENVIRONMENTMONITORINGSYSTEMBASEDONMCU毕业设计（论文）共70页（其中：外文文献及译文7页）图纸共1张完成日期201年6月答辩日期201年6月本科毕业设计（论文）学生诚信承诺保证书本人郑重承诺：《基于单片机的室内环境监控系统设计》毕业设计（论文）的内容真实、可靠，系本人在指导教师的指导下，独立完成。如果存在弄虚作假、抄袭的情况，本人承担全部责任。学生签名：年月日本科毕业设计（论文）指导教师诚信承诺保证书本人郑重承诺：我已按学校相关规定对同学的毕业设计（论文）的选题与内容进行了指导和审核，确认由该生独立完成。如果存在弄虚作假、抄袭的情况，本人承担指导教师相关责任。指导教师签名：年月日I摘要随着社会的发展，生活质量的提高，越来越多的人意识到房屋装修后所残留的气体对人体的伤害，而房屋装修后所残留的有害气体主要为甲醛。而甲醛的挥发又与温度和湿度有关，对此研究并设计一种检测室内温湿度和甲醛浓度的监控系统就很有必要。该系统的设计方案是基于单片机来实现的，选择温湿度传感器和有机气体传感器，传感器将采集到的数据经A/D转换送至单片机，单片机对数据进行处理后将温湿度和甲醛浓度显示，同时分析数据是否超标。当温湿度超标时，单片机通过蜂鸣器报警提醒人们来调整温湿度；当甲醛浓度超标时，单片机通过启动风机来降低甲醛浓度。此外，还能通过红外遥控器对系统进行控制。综上所述，本设计具有实时检测室内温湿度以及甲醛浓度、实时显示、温湿度超标报警、甲醛自动净化和红外遥控等功能，这些功能的实现可有效减少室内甲醛，为人们的生活环境提供有效的防护，并为人们提供了一个更加舒适、健康的环境，关键词：甲醛；单片机；液晶显示；报警；红外遥控IIAbstractWiththedevelopmentofthesocietyandtheimprovementoflifequality,moreandmorepeoplerealizethattheresidualgasafterthebuildingisdecorated,theharmofhumanbodyandtheharmfulgasoftheresidueafterthebuildingisdecoratedmainlyforformaldehyde.Andthevolatilizationofformaldehydeisrelatedtotemperatureandhumidity,anditisnecessarytostudyanddesignamonitoringsystemforindoortemperaturehumidityandformaldehydeconcentration.Designschemeofthesystemisbasedonsinglechipmicrocomputertorealize,chooseorganicgassensor,thetemperatureandhumiditysensorsandsensordatawillbecollectedbyA/Dconversionsenttothesingle-chipmicrocomputer,singlechipmicrocomputertodealwiththedataafterthetemperatureandhumidityandformaldehydeconcentrationshowedthatexcessiveanalysisdataatthesametime.Whenthetemperatureandhumidityisabovethestandard,thesinglechipiscalledbythebuzzertoalertpeopletoadjustthetemperatureandhumidity.Whentheconcentrationofformaldehydeisexcessive,thesinglechipcanreducetheconcentrationofformaldehydebystartingthefan.Inaddition,thesystemcanbecontrolledbyaninfraredremotecontrol.Tosumup,thisdesignhasthereal-timedetectionofindoorformaldehydeconcentration,temperatureandhumidity,andreal-timedisplay,temperatureandhumiditylevels,automaticalarm,formaldehydepurificationandinfraredremotecontrol,andotherfunctions.Theimplementationcanreduceindoorformaldehydeeffectively,provideeffectiveprotectionforpeople'slivingenvironment,provideamorecomfortable,healthyenvironmentforpeople.Keywords:formaldehyde;MCU;Liquidcrystaldisplay;Alarm;Infraredremotecontrol目录0前言............................................................................................................................11方案论证....................................................................................................................32硬件电路设计...........................................................................................................42.1单片机.....................................................................................................................42.1.1单片机选型方案对比........................................................................................42.1.2STC89C52简介..................................................................................................42.1.3单片机最小系统.................................................................................................52.2温湿度采集电路设计............................................................................................72.2.1SHT11温湿度传感器简介................................................................................72.2.2SHT11的工作原理............................................................................................82.2.3温度和湿度值的计算........................................................................................92.2.4SHT11的安装与连接.....................................................................................112.3气体传感器模块设计.........................................................................................112.3.1气体传感器MQ138简介...............................................................................112.3.2MQ138预警值的计算....................................................................................132.3.3MQ138的安装与连接....................................................................................132.4A/D转换电路设计..............................................................................................142.4.1ADC0804简介................................................................................................142.4.2A/D转换电路................................................................................................152.5显示电路设计.....................................................................................................152.5.1方案对比..........................................................................................................152.5.2LCD12864简介...............................................................................................152.5.3显示电路连接..................................................................................................162.6报警电路设计.....................................................................................................172.7红外遥控系统设计........................................................................