基于PLC的电阻炉温度控制系统论文

中文摘要I中文摘要各种工业和科学实验中最常见和最重要的热参数的温度，产品或结果的温度控制的精度将有显著影响。温度不同，PLC可靠性高，抗干扰性强能力强，抗干扰能力强，使用方便，PLC控制是比较好的控制中的一个。本文介绍的控制方案电阻炉，阐述了从硬件和软件的组合物和系统的功能中，温度控制系统主要被引入。该系统FP0系列PLC为控制核心，利用强大的PLC，首先能顺利地进行金属材料的热处理工艺,同时电气装置也能够按照设计要求稳定运行。该系统还使用触摸屏替代了普通的按钮，促进了人机互动，既可以随意修改程序段中的数值，又可以实现热处理工艺过程的自动跟踪和监控，实现了热处理工艺优化。外围电路简单，控制精度高，速度快，具有小型化和低功耗的优势。关键词：PLC；触摸屏；电阻炉；温度控制AbstractIIAbstractAvarietyofindustrialandscientificexperiments,themostcommonandmostimportantthermalparametersoftemperature,temperaturecontrolaccuracyoftheproductortheresultwillhaveasignificantimpact.Differenttemperatures,PLChighreliability,stronganti-interferenceability,stronganti-interferenceability,easytouse,PLCcontrolisabettercontrol.Thisarticledescribesthecontrolschemeresistancefurnace,elaboratedfromafunctionalhardwareandsoftwaresystemsandcompositions,thetemperaturecontrolsystemaremainlyintroduced.ThesystemFP0seriesPLCtocontrolthecore,theuseofpowerfulPLC,thefirstmetalmaterialheattreatmentprocesscanbeperformedsmoothly,andstableoperationoftheelectricaldevicecanbeinaccordancewiththedesignrequirements.Thesystemalsousesatouchscreeninsteadofthenormalbutton,andpromotethehuman-machineinteraction,botharefreetomodifytheprogramsegmentvalue,butalsocanautomaticallytrackandmonitortheprocessofheattreatmenttoachieveaheattreatmentprocessoptimization.Theperipheralcircuitissimple,highcontrolprecision,speed,miniaturizationandlowpowerconsumptionadvantages.Keywords:PLC;TouchScreen;ResistanceFurnace;TemperatureContro目录III目录中文摘要.................................................................IKeywords............................................................II第1章绪论.............................................................11.1课题背景.........................................................11.2课题目的..........................................................21.3电阻炉温度控制系统的发展状况......................................21.4本课题的研究内容.................................................3第2章PLC的概述.......................................................42.1PLC的介绍........................................................42.2PLC的基本组成...................................................52.3总体设计方案.....................................................52.3.1PLC和单片机的比较..........................................52.3.2系统结构图及说明...........................................52.3.3设计要求....................................................6第3章电阻炉的选择及改造..............................................73.1电阻炉的选择......................................................73.2电阻炉的改造......................................................73.2.1电阻炉炉盖部分的改造........................................73.2.2电阻炉内升降台的改造........................................73.3温度传感器类型及选择..............................................83.4A/D模块的选择....................................................93.5设计要求.........................................................10第4章硬件设计........................................................114.1.1PLC的介绍......................................................114.1.1PLC的介绍...................................................114.1.2PLC的基本组成..............................................114.1.3西门子s7-200...............................................12目录IV4.2传感器............................................................134.3固态继电器........................................................134.4硬件连线图........................................................13第5章控制算法描述.....................................................155.1程序流程图.......................................................155.2STEP7Micro/WIN32软件介绍......................................175.3PWM技术..........................................................175.4PID控制程序设计..................................................185.4.1PID控制算法.................................................185.4.2PID在PLC中的回路指令.......................................205.4.3PID参数整定.................................................22第6章电炉的结构原理及其梯形图程序.....................................236.1炉盖工作原理......................................................236.1.1炉盖液压回路的设计..........................................236.2电阻炉结构、原理..................................................236.3主程序............................................................256.4子程序............................................................27第7章系统测试.........................................................307.1启动组态王........................................................307.2参数监控和设定....................................................317.3报警信息提示......................................................327.4报表系统查询......................................................337.5趋势曲线监控......................................................337.5.1实时趋势曲线................................................337.5.2分析历史趋势曲线............................................347.6调试..............................................................36结论....................................................................38致谢....................................................................39参考文献......................