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单位代码01学号100119064分类号TP273+.2密级毕业设计说明书电锅炉温度控制系统的设计院（系）名称信息工程学院专业名称测控技术与仪器学生姓名邓继文指导教师吴娟2014年4月25日黄河科技学院毕业设计说明书第I页电锅炉温度控制系统的设计摘要电锅炉温度智能控制系统在工业生产和科研工作中占有重要的地位。锅炉汽包燃烧系统是工业蒸汽锅炉安全、稳定运行的重要指标。温度过高，会使蒸汽带水过多，汽水分离差，使后续的过热器管壁结垢，传热效率下降，过热蒸汽温度下降，严重时将引起蒸汽品质下降，影响生产和安全；温度过低又将破坏部分水冷壁的水循环不能满足工艺要求，严重时会发生锅炉爆炸。尤其是大型锅炉，一旦控制不当，容易使汽包满水或汽包内的水全部汽化，造成重大事故。因此，在锅炉运行中，保证温度在正常范围是非常重要的。基于单片机技术实现的电锅炉温度控制系统主要由温度检测电路、温度控制电路、温度显示电路三个部分组成。在本次设计中，选用符合测量温度范围要求的热电偶温度传感器来实现数据采集，用仪表放大电路对电压信号进行放大，实现对温度的检测和信号的传输；用单片机对所采集的数据进行处理后，再进行相应的控制，从而实现对温度的控制；采用LCD1602液晶显示器将处理的数据进行实时显示。然后根据设计电路进行了实际制作和测试分析，达到了预期的要求。关键词：单片机，热电偶温度传感器，LCD，MAX6675黄河科技学院毕业设计说明书第II页TheDesignoftheElectricBoilerTemperatureControlSystemAuthor：DengJiWenTutor：WuJuanAbstractAnnealingtemperaturecontrolsysteminindustrialproductionandscientificresearchoccupiesanimportantposition.Combustionsystemofboilersteamdrumisindustrialsteamboilersafeandstableoperationoftheimportantindicators.Temperatureistoohigh,canmakethesteamwithwatertoomuch,separationofpoor,makethefollow-upofsuperheatertubewallscaling,heattransferefficiencydrops,superheatedsteamtemperaturedrop,seriouswhenwillcausesteamqualitytodrop,affecttheproductionandsafety;Temperatureistoolowwilldamagepartofthewallofthewatercyclecan'tmeetthetechnologicalrequirements,serioushappenswhentheboilerexploded.Especiallylargeboiler,oncetheimpropercontrol,easytomakeallofthewaterinthewaterorsteamdrumdrumwithvaporization,causeseriousaccident.Therefore,inboileroperation,itisveryimportanttoensurethatthetemperatureinthenormalrange.Basedonsinglechipmicrocomputertechnologytorealizetheelectricboilertemperaturecontrolsystemismainlycomposedofthetemperaturedetectioncircuit,temperaturecontrolcircuit,displaycircuitofthreeparts.Inthisdesign,choosetomeettherequirementsofmeasuringtemperaturerangethermocoupletemperaturesensortoachievedataacquisition,instrumentamplifiercircuitofvoltagesignalisamplifiedandrealizethetemperaturedetectionandsignaltransmission;AfterthedatacollectedintheMCU,thenthecorrespondingcontrol,soastorealizethetemperaturecontrol;AdoptLCD1602LCDmonitorthereal-timedisplayofdataprocessing.Thenaccordingtothedesignofcircuitareanalyzedinactualproductionandtesting,toachievethedesiredrequirements.Keywords:MCU，ThermocoupleTemperatureSensor，LCD，MAX6675黄河科技学院毕业设计说明书第III页目录1绪论......................................................................................................................................11.1课题背景.....................................................................................................................11.2电锅炉简介.................................................................................................................11.3电锅炉温度控制系统.................................................................................................21.4设计要求.....................................................................................................................22温度控制系统方案分析......................................................................................................32.1设计思想.....................................................................................................................32.2几种方案设计.............................................................................................................32.3方案设计要求.............................................................................................................42.4课题研究的意义.........................................................................................................43电锅炉温度控制系统硬件设计..........................................................................................63.1温度检测电路.............................................................................................................63.1.1热电偶传感器.................................................................................................63.1.2MAX6675电路...............................................................................................73.2温度显示单元电路.....................................................................................................83.3温度控制电路...........................................................................................................103.3.1蜂鸣器驱动电路...........................................................................................103.3.2继电器...........................................................................................................113.3.3STC89C51单片机........................................................................................124电锅炉温度控制系统软件设计........................................................................................185电锅炉温度控制系统仿真................................................................................................205.1电路仿真结果...........................................................................................................206电锅炉温度控制系统设计实物图....................................................................................22黄河科技学院毕业设计说明书第IV页结论....................................................................................