簡介:I/67畢業(yè)論文畢業(yè)論文題目學院專業(yè)畢業(yè)年限學生學號指導教師III/67ABSTRACTINTHISPAPERTHEDESIGNPRACTICEOFBASEDONITBRINGFORWARDACARRIERTECHNOLOGYBASEDONTHEPOWEROFNETWORKINGENVIRONMENTTHATPERCEPTIONANDCOORDINATORDESIGNSCHEMETHESCHEMEADOPTSTHEARM,THEPICMICROCONTROLLERSERIES,RESPECTIVELY,THECOORDINATOR,PERCEPTIONDESIGNMODULEANDEXECUTEMODULECOORDINATORCANTHROUGHTHELCDSCREENCONTROLBUTTONSENDCONTROLINFORMATION,EXECUTIVEMODULEANDPERCEPTIONMODULETORECEIVETHESEINFORMATION,ANDTOREALIZETHELOCALENVIRONMENTMONITORANDCONTROLFORIMPLEMENTATIONOFTHEMODULETHESYSTEMADOPTSTHEADVANCEDELECTRICPOWERCARRIERCOMMUNICATIONTECHNOLOGY,NEEDNOTCOMPLEXTEDIOUSWIRING,ONLYWILLPERCEIVEMODULE,EXECUTIVEMODULE,COORDINATORTAKENUPINTHESAMEFIELDLINES,EACHMODULEISTHROUGHTHESPECIFICCOMMUNICATIONPROTOCOLSOFTHEINTERNET,COMMUNICATION,EASILYREALIZEROOMLIGHT,ELECTRICCURTAINS,TVSYSTEM,AIRCONDITIONINGSYSTEMCENTRALIZEDCONTROLSYSTEMANDTOREALTIMEMONITORINGROOMTEMPERATURE,HUMIDITY,LIGHT,ETC,TOSAVEENERGYANDREDUCECOST,INDOORENVIRONMENTDETECTSTHEHAVEAPOSITIVEROLE,ISACARRIERCOMMUNICATIONBASEDONELECTRICPOWERNETWORKCOMPOSEDOFCONTROLSYSTEMTHISPAPERINTRODUCESTHEDESIGNSCHEMEANDCIRCUITHARDWAREANDSOFTWAREDESIGNOFTHEDETAILEDPROCESS,ANDTHESYSTEMPERFORMANCEANDTHEADVANTAGESOFTHEFULLDISCUSSIONKEYKEYWORDSWORDSPOWERPOWERCARRIERCARRIERCONTENTCONTENTNETWORKINGNETWORKINGCOORDINATORCOORDINATORPICPICMICROCONTROLLERMICROCONTROLLERARMARM;
下載積分: 7 賞幣
上傳時間:2024-05-22
頁數(shù): 67
大小: 10.98(MB)
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簡介:外文資料原文DESIGNOFMEDICALWARDCALLSYSTEMBASEDONPOWERLINECARRIERTECHNOLOGYIINTRODUCTIONTHEMEDICALWARDCALLSYSTEMISAKINDOFCALLTOOLSWHENTHEPATIENTNEEDSACCESSTOCAREORDIAGNOSIS,PATIENTSREQUESTCANBEQUICKLYTRANSMITTEDTODOCTORSORNURSESONDUTYITISONEOFTHENECESSARYEQUIPMENTTOIMPROVETHELEVELOFHOSPITALCARECURRENTLY,THEREAREMANYMEDICALWARDCALLSYSTEMSWITHDIFFERENTTYPESANDDIFFERENTFUNCTIONONTHEMARKET,THEYAREDIVIDEDINTOTWOCATEGORIESTHECABLETYPEANDWIRELESSTYPE1TRADITIONALCABLETYPEMEDICALWARDCALLSYSTEMSTENDTOUSEACENTRALIZEDCALLSYSTEMSTRUCTURE,POWERLINES,DATACOMMUNICATIONLINES,VOICECOMMUNICATIONLINESTRANSMITSEPARATED,HASLINEWITHTHELAYINGOFMORE,HIGHCOST,INSTALLATIONDIFFICULTIES,POORREALTIME,HIGHFAILURERATEANDOTHERSHORTCOMINGSWIRELESSTYPEMEDICALWARDCALLSYSTEMSDONOTLAYTHELINE,BUTITSRELIABILITYISPOOR,ANDRADIOWAVESCANINTERFEREWITHOTHERMEDICALINSTRUMENTSANDEQUIPMENT,MOSTHOSPITALDONOTUSESUCHWIRELESSCALLSYSTEMWITHTHEDEVELOPMENTOFCOMMUNICATIONTECHNOLOGY,PEOPLEHAVEDONEALOTOFRESEARCHWORKFORPOWERLINECARRIECOMMUNICATIONTECHNOLOGYPOWERLINECARRIERCOMMUNICATIONSTECHNOLOGYREFERSTOAMEANSOFCOMMUNICATIONWHICHUSESPOWERLINESTOTRANSFERDATAANDMEDIASIGNALITLOADSHIGHFREQUENCYCONTAINSINFORMATIONONCURRENT,THENUSECURRENTTRANSMISSION,THENUSETHEADAPTERWHICHRECEIVESINFORMATIONTOSEPARATEHIGHFREQUENCYFROMTHECURRENT,ANDTRANSFERREDTOACOMPUTERORTELEPHONEINORDERTOACHIEVEINFORMATIONTRANSMISSIONELECTRICITYSUPPLYNETWORKISTHEMOSTPOPULARNETWORKINTHEWORLD,LOWVOLTAGEPOWERLINESCONNECTTOTHOUSANDSOFFAMILIES,ITCANBEUSEDFORDATACOMMUNICATIONANDINFORMATIONTRANSMISSIONWITHOUTLAYINGDEDICATEDCOMMUNICATIONLINEANDOCCUPYINGTHEWIRELESSCHANNELRESOURCES2THEREFORE,ITHASBECOMEPOSSIBLETHATUSINGLOWVOLTAGEPOWERLINESASTHETRANSMISSIONMEDIUM,ANDUSINGSPREADSPECTRUM,DIGITALENCODING,SINGLECHIPCONTROLTECHNOLOGYTOACHIEVEWARDCALLSINTHISSTUDY,THEPOWERLINECARRIERCOMMUNICATIONTECHNOLOGYHASBEENAPPLIEDTOWARDCALLSYSTEMTHEENTIRESYSTEMREQUIRESONLYATWOCORESHIELDEDCABLE,THROUGHTHEPOWERCORDTHATTHEHOSTPROVIDESTOEACHEXTENSIONREALIZETWOWAYDATACOMMUNICATIONWITHLOWCOST,SIMPLEINSTALLATION,EXTENSIVETRANSMISSIONLINES,ETC,THEHOSPITALWARDHASAGOODAPPLICATIONPROSPECTINPRACTICEIISYSTEMSTRUCTUREANDWORKINGPRINCIPLETHECALLSYSTEMMAINLYCONSISTSOFTHEHOST,EXTENSIONSANDPOWERLINECARRIERCIRCUITS,THEHOSTISINSTALLEDONTHEWARDNURSEDUTYROOM,EXTENSIONSWEREINSTALLEDINTHEWARD,AHOSTCANCONTROLMULTIPLEEXTENSIONS,一220VCIVILPOWERLINESISASATRANSMISSIONCHANNEL,INORDERTOACHIEVETWOWAYCOMMUNICATIONBETWEENTHEHOSTANDTHEEXTENSIONTHESTRUCTUREOFSYSTEMISSHOWNINFIG1THESYSTEMUSESACENTRALIZEDPOWERSUPPLY,SUPPLIESWORKPOWERTOWARDEXTENSIONTHROUGHTHETWOCORECABLEBYTHECOMMUNICATINGHOSTSTHESIGNALOFTHEHOSTTOEACHEXTENSIONTHROUGHTHEPOWERLINECARRIERCIRCUIT,AFTER一220VCOMMERCIALPOWERLINETRANSMISSION,ACHIEVESTHEHALFDUPLEXDATACOMMUNICATIONBETWEENTHEHOSTANDTHEEXTENSIONALINETOBOTHENDSATD1,CLAMPEDBYD1,THESTARTINGLEVELOFTHESIGNALISATAFIXEDVALUE,ANDTOPREVENTEXCESSIVEINRUSHCURRENTC2,C3ANDL2CONSTITUTEAPARALLELRESONANTCIRCUITWHOSERESONANTFREQUENCYIS120KHZTHE120KHZSIGNALINTHEINPUTWEAKSIGNALISSELECTEDFREQUENCYANDAMPLIFIEDINORDERTOIMPROVETHESENSITIVITYOFTHERECEIVEDSIGNALITISSENTTOTHESIGINPORTOFCHIPPL2102,THECARRIERSIGNALRECEIVEDBYPL2102DEMODULATESTHEDATABITINFORMATIONAFTERBEINGTREATMENTINHOUSE,THEDATABITINFORMATIONISOUTPUTTOTHEHOSTANDEXTENSIONCONTROLCHIPBYRXDTXDPORT,MEANWHILE,HEADSYNCOUTPUTSLOWLEVELSIGNALTRANSMITTINGCIRCUITITINCLUDESTHEPOWERAMPLIFIER,THEFILTERSHAPINGCIRCUITANDTHECOMPOSITEPIPECOMPLEMENTARYSYMMETRYPOWERAMPLIFIERCIRCUITCOMPRISEDOFV1,V2,V3,ANDV4ITAMPLIFIESTHEPOWEROFTHECARRIERMODULATIONSIGNALOUTPUTTEDBYPL2102SPSKOUTPORTITISADDEDTOTHECOUPLINGCOILAFTERFILTERINGINTEGERBYC1ANDL1,ANDISFEDINTOTHEPOWERLINETHROUGHTHECOUPLINGCOILTHECARRIERMODULATIONSIGNALOUTPUTTEDBYPL2102ISAMPLIFIEDTHROUGHTHEPOWERAMPLIFIERCIRCUIT,FILTEROUTSIGNALNOISEANDFALSESIGNALCAPACITORC1,INDUCTORL118UH/200MAOFTHEINTEGRALFILTERCIRCUITAREUSEDTOADJUSTTHEEMISSIONCURRENTANDWAVEFORM,REDUCINGC1ANDINCREASINGL1WILLREDUCETHEEMISSIONCURRENTANDIMPROVETHEWAVEFORMCONVERSELY,ITWILLINCREASETHEEMISSIONCURRENTANDWAVEFORMDISTORTIONASTHECOILLOADCAPACITYISAFIXEDVALUE,ADJUSTINGC1ANDL1WILLAFFECTTHETRANSMISSIONPOWERANDTHEIRPOWEROFTHECOILMEANWHILE,THEEMISSIONVOLTAGEVHHAFFECTSSIZEOFTHETRANSMITTEDPOWER,FOLLOWINGTHELAUNCHVOLTAGEDROP,TRANSMITPOWERHASDECLINED,THEHIGHERTHEVOLTAGEIS,THEGREATERTHETRANSISTORSOWNPOWERCONSUMPTIONISTHISEMISSIONVOLTAGEISTYPICALLYCHOSENBETWEENLOV一18V6CDESIGNOFTHEEXTENSIONCIRCUITTHEEXTENSIONINCLUDESMCUAT89C52,POWERLINEMODULATIONCHIPPL2102ANDSOMEPERIPHERALCIRCUITSSCHEMATICISSHOWNINFIG3EIGHTREQUESTBUTTONSWITCHESARECONNECTEDTOTHEPORTPOOFTHEMCUAT89C52,WHENABUTTONISPRESSED,THEINPUTSTATEOFTHEPORTPOCORRESPONDINGTOTHISBUTTONIS0WHENTHEMCUCONFIRMSTHATTHEHOSTCALLSITSADDRESS,ITWILLSCAN8BITI/OPORTSTATUSOFPORTP0,ONCEAKEYISPRESSED,THEREQUESTINFORMATIONCORRESPONDINGTOTHISBUTTONWILLIMMEDIATELYSENDTOTHEHOST,ANDWAITFORTHEHOSTTOCONFIRMWHENTHECORRECTINFORMATIONISRETURNED,THEHOSTDRIVESTHECORRESPONDINGLEDINDICATORSDISPLAYVIAP2PORTTOINDICATETHATAREQUESTSIGNALSENTSUCCESSFULLYEIGHTBUTTONSWITCHESFORREQUESTARENUMBERED,EACHSWITCHREPRESENTSAKINDOFINFORMATIONFORREQUEST,WHICHCANBEDEFINEDBYUSERS7P10ANDRESETPORTOFTHEMCUAT89C52CONNECTTHEBACKUPPOWERANDPOWERDOWNPROTECTIONCIRCUITINORDERTOENSURETHATTHESYSTEMCANWORKPROPERLYWHENPOWERFAILUREOCCURSIFTHESYSTEMHASDETECTED“ANIMMINENTLOSSOFPOWER“SIGNAL,THESIGNALTHROUGHANEXTERNALINTERRUPTINTOREQUESTSINTERRUPTTOTHEHOSTTHEHOSTRESPONSESTOANINTERRUPTANDSENDSTHERELEVANTDATAINTOTHERAMTOSTORE,THENWRITE“0“INTOP10,THELOWLEVELONP10PINTRIGGERS555TIMER,THE555TIMEROUTPUTPULSEDEPENDSONR,CANDVCCIFTHETIMER555ENDTIMER,VCCISSTILLNORMAL,THISSHOWSTHATTHE“IMMINENTLOSSOFPOWER“SIGNALISTHEWRONGALARMSIGNAL,THE555OUTPUTPULSEISADDEDTORESETANDTHEHOSTREOPERATIONAFTERRESETIFTHE555TIMERENDTIMING,VCCISREALLYLOWER,THE555TIMEROUTPUTSHIGHLEVELTRIGGEREDBYTHEP10LOWLEVEL,ANDADDSTORESETFORSTANDBYPOWERUNTILVCCHASRETURNEDTONORMAL,THENKEEPAPOSITIVEPULSEWIDTHTIMEDETERMINEDBYTHER,CTHEAPPROPRIATER,CVALUESHOULDBESELECTEDINORDERTOHAVEENOUGHPOWERONRESETTIMEAFTERTHEMAINPOWERSUPPLYVCCRETURNSTONORMAL,THENMAKETHEHOSTRESUMENORMALOPERATIONAFTERRELIABLERESETTHEAT89C52CLOCKUSESONCHIPCLOCKOSCILLATORMODE,THEQUARTZCRYSTAL96MHZANDOSCILLATIONCAPACITORAREEXTERNALCONNECTEDBETWEENXTAL1ANDXTAL2PIN,P16PORTCOMMUNICATESWITHTHEHOSTTHROUGHTHEPL2102CHIP
下載積分: 3 賞幣
上傳時間:2024-05-21
頁數(shù): 7
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