PLC在供暖鍋爐控制系統(tǒng)中的應(yīng)用2畢業(yè)論文.doc

論文（設(shè)計(jì)）題目PLC在供暖鍋爐控制系統(tǒng)中的應(yīng)用學(xué)生姓名：所在院系：機(jī)電學(xué)院所學(xué)專業(yè)：應(yīng)用電子技術(shù)教育導(dǎo)師姓名：完成時(shí)間：摘要本文是基于PLC的水暖鍋爐控制應(yīng)用的設(shè)計(jì)，主要采用溫度傳感器來采集鍋爐水溫信號，用水位傳感器來采集鍋爐水位信號，用變頻器來控制循環(huán)泵的轉(zhuǎn)速，并把這些信號通過模數(shù)轉(zhuǎn)換送給PLC(ProgrammableLogicController),與PLC內(nèi)部設(shè)定的參數(shù)進(jìn)行比較，以判斷是否需要進(jìn)行相應(yīng)的操作，從而實(shí)現(xiàn)PLC的自動(dòng)控制的目的。其中在溫度控制中，根據(jù)溫度傳感器檢測的室外溫度和出回水溫度差，對溫度進(jìn)行控制，現(xiàn)室內(nèi)溫度的恒定；在補(bǔ)水泵控制中，用高亮二極管和光敏三極管配對使用檢測水位既準(zhǔn)確又無污染，避免了水資源的浪費(fèi)；在循環(huán)泵控制中，用兩臺循環(huán)泵工作，當(dāng)其中一臺出現(xiàn)故障時(shí)，報(bào)警系統(tǒng)發(fā)出報(bào)警信號，PLC接收到信號后另一臺循環(huán)泵自動(dòng)工作。該系統(tǒng)精度高，具有良好的人機(jī)交互功能，采用PLC控制供暖鍋爐具有可靠性高，抗干擾能力強(qiáng)、控制系統(tǒng)簡單易懂、維修方便等優(yōu)點(diǎn)。關(guān)鍵詞：可編程控制器（PLC），傳感器，變頻器，報(bào)警，自動(dòng)控制APPLICATIONOFPLCINHEATINGBOILERCONTROLLEDSYSTEMAbstract：ThetextbasescontrollerofPLCwaterheatingofaboiler,whichmostlyadoptstemperaturetransducertocollectsignalofboilerwatertemperature,adoptsw-aterleveltransducertocollectsignalofboilerwaterlevel,makesuseoftransducerc-ontrollingrotatespeedofcirculationpumpandsendsthesignalstoPLC(Programm-ableLogicController)withmodulusdiversion.Then,thesignalscomparewithpara-meterofenactmentinsideofPLC,inordertojudgewhetherPLCneedtoputuprele-vantoperation,andthatrealizeauto-controlofPLC.Therearefourpartsinthedesignwhichmakeupoftheboilertemperaturecontroller,thewaterpumpcontroller,thecir-culatepumpcontrollerandthedealingwithtrouble.Inboilertemperaturecontroller,thenumericalvalueoftemperaturemayrandomlychangeaccordingasthedifferents-eason.Ifituseinthesmallerarea,itcanadjustatanymomentaccordingtorequirem-ent.Inthewaterpumpcontroller,itusemorelightnessdiodeandphotosensitivedyna-trontomeasurewaterlevel.Thismethodisnotonlyprecisebutalsocleanlyandavoi-dingwasteresource.Inthecirculatepumpcontroller,therearetwocirculatepump,ifoneisintrouble,thealarmislighttheotherswillbeautoworkingwhenitreceivesth-esignal.ThedesignadoptPLCtocontrol,itishigherdependabilityandbiggerconve-nienceevenifitalsonaturalworkingintheverybadlyenvironmentandhavemanyf-unctionsofthecomputer.Thecontrollersystemissimpleandconveniencetomend.Keywords:ProgrammableLogicController(PLC),sensor,transducer,alarm,Aut-o-control目錄1緒論.52系統(tǒng)設(shè)計(jì)方案.52.1系統(tǒng)具體設(shè)計(jì)方案.52.2系統(tǒng)工作原理.63系統(tǒng)硬件部分配置.73.1PLC的配置.73.2變頻器配置.73.3電動(dòng)調(diào)節(jié)閥配置.83.4手動(dòng)閥配置.83.5傳感器配置.83.6通訊接口.93.7配電器.94系統(tǒng)的具體設(shè)計(jì)與實(shí)現(xiàn).94.1溫度控制部分.1