宁波港液体化工监控系统研究

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1、上海海事大学硕士学位论文宁波港液体化工监控系统研究姓名：徐坚国申请学位级别：硕士专业：交通运输工程指导教师：李玉如;张红波20060501上海海事人学交通运输T程硕上论文AbstractItisveryimportanttocarryoneffectivecontrolinthechemicaltankfieldtoraisingmanagementlevel，reducingtheworkers’laborintensity,improvingworkingcondition，avoidingtheaccident．etc．Inou

2、rcountry,themanagementtothetankfieldandquaymainlydependedonartificialforalongtime，whichmeanttherewasnoreal“monitoringsystem”．Bythebeginningofthe1990s，asvariouskindsofnewtechnologiesandnewmethodsappliedtothefieldofmeasuringthetank，theinstrumentthatcanautomaticallymeasure

3、theliquidlocationwasequippedbasicallyonthetankineverytankfield．throughwhichtheoperatorcouldsitinthecontrolroomandmakeageneralsurveyofthestateofallthetank．buttheconcretecontrolworkstilldependedonartificial．Withthesystematictheoryoftheindustrialbusbeingputforwardandthepro

4、ductsbeingundertheindustrialprocesscontrolinalargeamount，automaticcontrolsystemandinstrumentdeveloptowardsdigitization，intelligentandnetwork(ordispersion)。andPROFIBUSbusmakesremotecontrolappliedtolarge—scalecomplicatedsystemnicely．TheremoteI／Osystem，whoseappearancehasso

5、lvedproblemsoftraditionalexplosion—proofsystem，suchashighinvestmentofproduct，lowdependence，andcomplicateapplication，isusedextensivelyinthefieldofindustry．ThefieldcontrollerbasedonProfibustechnologyhasreallyreflexedtheconceptofdecentralizedcontrolinprocessautomation．Cont

6、rolcouldbedispersedtoeachfieldbusdevicefrOmgeography．unlikethetraditionalDCSsystemthatallcontrolstrategyismadeonitself．Thefieldbuscontrolsystembecomesthedirectionofcontrolsystemdevelopment，andnowadays，activelyexploitingthecontrolsystembasedonfieldbusandadvancingthedevel

7、opmentofindustrialautomationbecomestheimportantsubject．Inthisthesis，byanalyzingthemajortype，characteristicandapplicationfieldofthefieldbusnetworksystemofdomesticandinternationalindustrialcontrol，analyzingcOnscientiousIytotheexistingmonitoringsystemsituationoftankfieldof

8、oldchemicaltankfieldintheharborCompanyofZhenhaiofNingbo，andJI上海海事大学交通运输工程硕士论文comparingthecharacteristicoftotal