基于PLC的曝氣池溶解氧自動監(jiān)測控制系統(tǒng).pdf

1、分類號I旦!《密級UDC鏘至如諺，11學(xué)校代碼學(xué)號隸。軔大粵碩士學(xué)位論文基于PLC的曝氣池溶解氧自動監(jiān)測控制系統(tǒng)10286研究生姓名陸熊指導(dǎo)教師姓名(職務(wù)、職稱)周杏鵬教授胡學(xué)同副教授申請學(xué)位級別工學(xué)碩士專業(yè)名稱測試計量技術(shù)及儀器論文提交日期200303論文答辯日期200304學(xué)位授予單位和日期東南大學(xué)答辯委員會主席黃惟一評閱人二oo三年三月東南大學(xué)碩士學(xué)位論文AbstractWiththeincreasingregardtotheen

2、vironmentalpollution，moreandmorewastewatertreatmentplantsarebuildinginourcountryHoweverduetothelowautomatizationandhiighenergycostinthewastewatertreatmentprocesses，mostwastewatertreatmentplantsinthecountlffarerunningwith

3、lowtreatmentefficiencyandhightreatmentcostTheaerationbasinofactivatedsludgeprocessisnotonlythemostimportantoperationalpart，butalsothemostenergyconsumptionpartinawastewatertreatmentplantThedissolvedoxygen(DO)levelisthemos

4、timportantparameterintheaerationbasin，whichwillhavethedirecteffectonthewastewatertreatmentefficiencyandcostThethesisfocasesontheresearchofDOmeasurementandcontrolintheaerationbasinandbringsforwardanintelligentDOmeasuremen

5、tandcontrolsystemBasedonPLCandwiththeuseofDOmeter、touchscreenandvariable行equencyDrive(VFD)，thesystemcanachievethemeasuringandcost—savingcontrollingoftheDOlevelintheaerationbasinWiththeapplicationofthePIDcontrollerofthePL

6、CandtheusingofVFD，thesystemCanbewidelyusedtoimprovetheautomatizationlevelandreducethecostofthewastewatertreatmentplantsinourcouotryAlso，thethesisgivesaprototypedesignofanintelligentDOmeterbasedonGLI5540DOsensorThrougIldi

7、gitaldesignmethods，theDOmeterCanachievethereal—timemeasurementofDO(140ppm)、temperaturecompensation、LCDdisplayandstandardsignaloutputs“20mAcurrentmodeandO～5vvoltagemode)Ithasthefeatureofhighaccuracymeasurementhighstabilit

8、yandlowcostThet11esisdescribestheoperationtheoryoftheintelligentDOmeasurementandcon訂olsystemandgivestheprogramdesignofPLCandtouchscreen，hardwaredesignoftheDOmeterandsoftwareprogramdesignbasedonC51languageAttheendofthethe