┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊PAGEII加热炉温度控制系统设计[摘要]加热炉温度控制系统广泛应用于冶金、化工、机械等各类工业控制中，并且在国民经济中占有举足轻重的地位，本文介绍了一种基于单片机的加热炉温度控制系统。本系统以单片机AT89C51为核心，由温度检测、变送及转换电路、控制电路、显示电路、键盘电路、报警电路等组成。本系统通过热电偶温度传感器对温度进行实时检测、变送并通过A/D转换电路转换为数字信号送给单片机，单片机对温度数据进行数字处理并进行PID运算计算出控制量，来改变固态继电器的导通和关断的时间，从而改变加热功率实现对温度控制。其中键盘电路可以对温度进行预设；显示电路可以显示当前温度，直观易懂，让人一目了然；当炉内温度过高或过低时，将会进行声光报警。该系统硬件成本低，控温精度较高，可靠性好，抗干扰，具有适合企业大规模生产的产品实用性。[关键词]加热炉；AT89C51；PID控制；温度控制TheDesignofTheHeatingFurnaceTemperatureControlSystem[Abstract]Theheatingfurnacetemperaturecontrolsystemiswidelyusedinmetallurgy,chemicalindustry,machineryandotherkindsofindustrialcontrol,andhasplayadecisiveroleinthenationaleconomystatus,thispaperintroducesakindoffurnacetemperaturecontrolsystembasedonSCM.TheAT89C51microcontrollersystemasthecore,bythetemperaturedetection,transmissionandconversioncircuit,controlcircuit,displaycircuit,keyboardcircuit,alarmcircuit.Thesystemthroughthethermocoupletemperaturesensorfortemperatureinreal-timedetection,transmissionandconversionthroughtheA/Disconvertedtoadigitalsignaltothemicrocontroller,microcontrollerfordigitalprocessingoftemperaturedataandPIDoperationstocalculatethecontrolquantity,tochangethesolidstaterelayturn-onandturn-offtime,thuschangingtheheatingpowerofthetemperaturecontrol.Thekeyboardcircuitmaybepresettemperature;displaycircuitcandisplaythecurrenttemperature,intuitiveandeasytounderstand,letpeoplestickoutamile;whenthefurnacetemperatureistoohighortoolow,willalarm.Thehardwareofthissystemislowcost,hightemperaturecontrolaccuracy,goodreliability,anti-interference,whichissuitablefortheproductispracticalforlarge-scaleproductionenterprises.[Keyword]Heatingfurnace；AT89C51；PIDcontrol；Temperaturecontroli目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc358635359"第1章前言PAGEREF_Toc358635359\h1HYPERLINK\l"_Toc358635360"1.1本课题的研究目的和意义PAGEREF_Toc358635360\h1HYPERLINK\l"_Toc358635361"1.2本课题的国内外研究现状PAGEREF_Toc358635361\h