南京工程学院自动化学院本科毕业设计(论文)题目:基于PLC温度控制系统的设计专业:测控技术与仪器班级:测控072学号:xxx学生姓名:xxx指导教师:xxx教授xxx副教授起迄日期:xxx设计地点:xxxGraduationDesign(Thesis)TheDesignOfTheTemperatureExaminationInPLCTemperatureControlSystemByWANGZhuJieSupervisedbyProf.XIAQingGuanAssociateProf.LUHongSchoolofAutomationNanjingInstituteofTechnologyJune,2011南京工程学院自动化学院本科毕业设计(论文)摘要本文介绍基于PLC的温度控制系统的设计,包括A/D转换、标度变换、温度检测环节、积分分离PID算法以及过零数字触发电路的设计。主要内容:实际温度经温度传感器检测,得到模拟电压值,模拟量再经A/D转换和标度变换后得到实际炉温。数字控制器根据恒温给定值与实际温度的偏差e(k)按积分分离PID控制算法,得到输出控制量u(k),控制可控硅导通时间,调节炉温的变化使之与给定恒温值一致。达到恒温控制目的。本系统对温度检测和调节环节做了进一步的优化设计,使该系统更实用、易行和可靠,同时也提高了产品质量和减轻人工劳力负担。它在实际应用中具有一定参考价值。关键词:温度检测;温度传感器;A/D转换;PIDI南京工程学院自动化学院本科毕业设计(论文)ABSTRACTTheintroductionoftemperature-basedPLCcontrolsystemdesign,includingA/Dconversion,scalingtransformation,temperaturecheckinglinks,scoringazeroseparationPIDalgorithmsanddigitaltriggeringcircuitdesign.Mainelements:theactualtemperatureofthetesttemperaturesensors,analogvoltageisthevalue,volumeviasimulationA/Dafterhisconversionandscalingpracticalfurnacetemperature.Digitalsignalcontrollerswillbeunderconstanttemperaturetothevalueandtheactualtemperaturedeviationse(k)byscoringseparationPIDcontrolalgorithms,withthevolumeofexportcontrolu(k),lead-timesilicon-controlledrectifiercontrol,regulatefurnacetemperaturechangestothecurrentagreementwiththegivenconstanttemperature.Achievethermostaticcontrolpurposes.Temperatureofthesystemtodofurthertestingandregulatoryaspectsofthedesignoptimization,enablingthesystemmorepracticalandeasyOKandreliable,whilealsoraisingproductqualityandreducingtheburdenofmanuallabor.Itmusthavepracticalapplicationinreferencevalue.Keywords:temperaturetesting;Temperaturesensors;A/Dconversion;PIDII南京工程学院自动化学院本科毕业设计(论文)南京工程学院自动化学院本科毕业设计(论文)目录前言............................................................................................................1第一章系统总体方案...............................................................................2第二章系统硬件设计...............................................................................42.1PLC选择............................................................................................................42.1.1FX2N-48MR-001PLC..................................................................................42.1.2FX2N-4AD特殊功能模块...........................................................................52.2硬件电路设计....................................................................................................72.2.1温度值给定电路..........................................................................................82.2.2温度检测电路..............................................................................................82.2.3过零检测电路............................................................................................102.2.4晶闸管电功率控制电路...............................................................................