GlobalCongressonIntelligentSystems
    DesignofRemoteSupervisorySystemofLarge-scaleOilTanksBasedonASP
    LinHongju,LiuRongchang,WangQingzhu,MaJiwei,LiuJinhua(HebeiNormalUniversityofScience&;Technology,HebeiQinhuangdao,066004,China)(Email:3710167@qq.com)Abstract
    Atpresent,manylarge-scaleoiltanksofpetrochemicaltankfarmsareoperatedbymanualpoweroradoptedbyC/S(Client/Server)accessmode,onenewremoteonlinesupervisingsystembasedonASPwaspresented.TheCANBuswascoreofbottomlayercontrolnetwork,anddesignofCANBusintellectnodeisgiven.WebserverwasbuiltbyASPandDDE(DynamicDataExchange)basedonB/S(Browser/Server)accessmode.DebuggingresultsandWebreleasedmethodweregiven.SeamlessconnectionhasbeenrealizedbetweencontrolnetworkandInternet/Intranet.AuthorizeduserscansuperviseoiltanksparametersbygeneralIEbrowseronoff-site.Thesystemapplicationprospectsarewidespreadinpetroleumandchemicalindustry.Keywords:TankFarms;WebServer;CAN(ControllerAreaNetwork);ASP(ActiveServerPage);Self-definingWindowsMessage;RemoteSupervisory.Asfig.1followed,thewholesystemismadeupofthreelayers,thatis,lowerlayer,middletierandtoplayer.ToplayerisinchareofsupervisingbyclientsthatareontheInternetorinLAN(LocalAreaNetwork).MiddletierisWebserver,itismostlyinchargeofdataprocess,resultsavinganddatatransfering.LowerlayerismadeupofCANintellectnodesandlarge-scaleoiltankswhicharedistributedindifferentplaces,CANintellectnodescanmeasureandcontrolthem.
    3.CANbusinterfacedesign
    Large-scaleoiltanksarecharacteristicofmanyspotslocated,largeareacoveredandfewparametersmeasuredetc[1].Besides,costsneedtobeaccountedforthedesign.Soitcan'tberespectivelysethostcomputerforeachoiltank.Accordingly,alllarge-scaleoiltanksareconnectedtomakeuplowerlayercontrolnetworkbyCAN,whichshareonehostcomputerbyCANadapter.
    toplayer
    1.Preface
    Supervisinganddatacollectingofoiltanksinpetrochemicaltankfarmsareoperatedbymanpowerinourcountryallalong.Firstofall,notonlylaborintensityisstrongandworkefficiencyislow,butalsoitiseasytomakemistakebyhumanfactors.Secondly,itisdisadvantageforrelevantpersonneltoknowaboutactualoperationonthespotintimeandhistoricalproductioninformation,unabletoprovidereliabledatasupportforproductiondispatchingdecision,onthesametime,itisdisadvantageforimprovingmanagementbasedonscienceandnormalization.Soitisverynecessaryforoiltankssupervisingautomation,intellectualizationandnetwork.Accountforallabove,designoflarge-scaleoiltanksremotesupervisingbasedonFieldbusandASPispresentedinthepaper.

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