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1、长春理工大学光电信息学院毕业设计编号本科生毕业设计基于PLC自来水厂自动控制系统设计TheSubjectofGraduationProject学生姓名吴开舜专业电气自动化技术学号1003010136指导教师吴丽娇分院船舶系2017年3月长春理工大学光电信息学院毕业设计摘要供水是一个关系国计民生的重要产业，随着我国改善人民生活条件、建设小康社会及提高劳动生产水平等目标的实现，对自来水水质的要求也越来越高。水处理厂计算机自动化控制系统是保证安全、连续、优质供水的措施。本文通过分析国内外已建水厂自动化控制系统的现状，结合工艺设备智能化的发展趋势，以
2、及我国中小型水厂现状，设计了一套以PLCS7-200作为控制器的自来水自动控制系统，该系统能实时监测水质、取水流量、pH值、管网压力，监控厂区安全，自动控制投矾、加氯，还能自动存储历史数据。此系统不仅能降低能耗、节约成本、减少维修维护工作强度、提高管理水平、确保供水质量，还能推进我国给水工艺的发展，对减小与先进水平的差距都具有现实意义。通过运行情况表明，该系统功能齐全，性能稳定可靠，具有较强的实用性和推广价值。关键词：PLC自动化控制系统上位机监控系统长春理工大学光电信息学院毕业设计ABSTRACTThewaterserviceisasign
3、ificantindustryinnationalwelfareandthepeople'slivelihood.Withthequickeningpaceofpeople'slivingstandardandtheobjectiveofachievingbuildingawell-offsocietyandenhancingproductivitylevel,thewatersupplyisincreasinglydemandedforthehighquality.Thecomputerautomationcontrolsystemofth
4、ewaterworksisaneffectivemeasureforguaranteeingthehighqualityofthewatersupplyinsecurityandcontinuity.Thisarticle,whichcombineswiththedevelopmenttendencyoftheprocessingequipmentintelligentandtherealityofsmallandmedium-sizedwatertreatmentplantinourcountry,hasdesignedawatersupp
5、lyautomaticcontrolsystemofPLCS7-200controllerbyanalyzingtherealityofthewaterworksautomationcontrolsystembothathomeandabroad.Thiswatersupplyautomaticcontrolsystemcaninrealtimemonitorthewaterquality,thewaterdrawrate,thepHvalue,thepipenetworkpressure,themonitorsiteareasecurity
6、,etc.Besides,thesystemcanautomaticallyaddvitriolandthrowchlorine;also,thesystemcanautosavehistoricaldata.Inaddition,thesystem,inwhichthereisanoperationsignificanceforreducingthegapwithadvancedstandards,notonlycutsdowntheenergyconsumption,savescost,reducestheservicemaintenan
7、ceworkingstrength,enhancesthemanagementlevel,guaranteesthewatersupplyquality,butalsoimprovestheadvancementofthewatersupplytechnology.Therunningconditionsofthesystemrevealthatitssystemfunctioniscomplete;itsperformanceisstableandreliable;therearestrongpracticabilityandpromoti
8、onvalue.Keyword：PLCautomaticcontrolsystempositionmachineofmonitorandcontrolsystem长
