摘要洛阳理工学院毕业设计（论文）PAGEIV基于PLC的水暖锅炉控制系统改造研究摘要本系统是基于PLC的水暖锅炉控制，在设计中主要有水位检测、温度检测、压力检测、按键控制、水温控制、水位控制、循环控制、压力控制、显示部分、故障报警等几部分组成来实现供暖控制。主要用水位传感器检测水位，用数字温度传感器Dsl8820来检测水温，用五个控制按键来实现按健控制，用三位LED显示器来完成显示部分，用变频器来控制循环泵的转速，用压力传感器检测锅炉内部压力。并且通过模数转换把这些信号送入PLC中。把这些信号与PLC中内部设定的值相比，以判断PLC是否需要进行相应的操作，即是否需要打开鼓风机，是否需要开启补水泵，是否需要加快循环泵的转速等操作，从而实现单片机自动控制的目的。本设计用PLC控制易于实现锅炉供暖、而且有造价低、程序易于调试、一部分出现故障不会影响其他部分的工作、维修方便、等优点。关键词：PLC，传感器，水位，温度，循环，自动控制BasedPLCDesignofHeatingBoilerControlledSystemResearchABSTRACTThesystemicdesignbasescontrollerofCMSwaterheatingofaboiler,itmostlymakesupofmeasuringwaterlevel,measuringawatertemperature,controllingakeys-press,controllingawatertemperature,controllingwaterlevel,controllingcirculate,controllingpressure.Showingapart，givinganalarmordertorealizeheatingcontroller,thedesignadoptsPLCtocontrolboilerheating.ItmostlyusesatemperaturesensorDS18B20tomeasurewatertemperature.Useswaterlevelsensortomeasurewaterlevel,usesatransducertocontrolcyclepump'srotatespeed.Usesfivekeys-presstocontrolkey-press.Usesthreelight-emittingdiodesdisplaytofinishadisplayparts.Usesatransducertocontrolrotatespeedofcyclepump.Usesapresstransducertomeasurepressintheboiler.ItsendsthosesignalstoPLCthroughmodulusandholderthosesignalstocomparewithenactmentinthePLCtojudgewhetherPLCneedtocarrythroughrelevantoperationnamely.Whetheritneedstoopenafan,whetheritneedstoturnonawaterpump.whetheritneedstoquickenrotatespeedofapumpandsoon.ItfinishesanaimofPLCauto-controller.ThedesignmakesuseofthePLCtocontrolboilerwhichiseasytorealizeboilerheating.Itischeaptomanufacture.Itiseasytodebugitsprocedure.Whenapartisintrouble.Itdoesnotinfectothersanditisconveniencetomend.Itiswidelytousemanyofareas.KEYWORDS:PLC,transducer,waterlevel.Watertemperature,Auto-control前言目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc264209105"前言PAGEREF_Toc264209105\h1HYPERLINK\l"_Toc264209106"第1章供暖锅炉改造设计思路PAGEREF_Toc264209106\h2HYPERLINK\l"_Toc264209107"1.1供暖锅炉改造设计要求PAGEREF_Toc264209107\h2HYPERLINK\l"_Toc264