英语文献翻译.docx
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英语文献翻译.docx
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英语文献翻译
本科毕业设计(论文)
中英文对照翻译
院(系部)机械与动力工程学院
专业名称测控技术与仪器专业
年级班级测控10-02班
学生姓名温京光
指导老师王红星
2014年3月15日
Infraredremotecontrol
and51singlechipmicrocomputer
People'seyescanseethevisiblewavelengthfromlongtoshortaccordingtothearrangement,inordertored,orange,yellow,green,green,blue,violet.Oneoftheredwavelengthsfor0.62~0.76muonm,Purpleis0.38wavelengthrange~muonm.Purpleisshorterthanthewavelengthoflightcalledultravioletray,redwavelengthsoflightislongerthanthatofinfraredlight.Infraredremotecontrolistousewavelengthfor0.76~1.5muonmbetweenthenearinfraredtotransfercontrolsignal.
Commonlyusedinfraredremotecontrolsystemofgeneralpointstransmitandreceivetwoparts.Themaincomponentpartforthelaunchofinfraredlightemittingdiode.Itisactuallyaspeciallightemittingdiode,duetoitsinternalmaterialdiffersfromordinarylightemittingdiode,resultinginitsendsoncertainvoltage,itisaratherinfraredlight.Useofinfraredlightemittingdiodetheinfraredwavelengths,for940nmappearanceandordinary,justthesamelightemittingdiodefivedifferentcolors.Infraredlightemittingdiodegenerallyhaveblackandblue,transparentthreecolors.Judgementofinfraredlightemittingdiodeandjudgmentmethod,usingamultimetertoordinarydiodeelectricblockmeasureofinfraredlightemittingdiode,reverseresistance.Theinfraredlightemittingdiodeluminescenceefficiencytousespecialinstrumenttomeasureprecise,anduseonlyspareconditionstopullawayfromroughlyjudgement.Receivingpartofinfraredreceivingtubeisaphotosensitivediode.
Inactualapplicationofirreceivingdiodetoreversebias,itcanworknormally,i.e.,theinfraredreceivingcircuitapplicationindiodeisusedtoreverse,highersensitivity.Infraredreceivingdiodeusuallyhavetworoundandrectangular.Duetothepowerofinfraredlightemittingdiode(orlesscommonly100mW),soirreceivingdiodereceivedsignalsisweak,sowillincreasehigh-gainones.theamplifiercircuit.
IncommonCX20106A,etcPC1373Hmuoninfraredreceivingspecialamplifiercircuit.Inrecentyearsbothamateurorformalproducts,mostlyusinginfraredreceivingheadfinished.Theheadofinfraredreceivingproductpackagesgenerallyhastwokinds:
onekindUSESsheetshielding,Akindofplasticpackaging.Therearethreepin,namelythepoweris(VDD),powernegative(GND)anddataoutput(VOorOUT).Infraredreceivingheadfootarrangementfortypesvaried,manufacturer'sinstructions.Finishedtheadvantagesofinfraredreceivingheadisnotinneedofsophisticateddebuggingandshellscreen,useriseasatransistor,veryconvenient.Butwhenusedintheinfraredreceivingattentionfinishedfirstcarrierfrequency.
Infraredremotecommoncarrierfrequencyfor38kHz,thisistransmittedbyusing455kHzTaoZhentodecide.Atthelaunchofcrystalswereintegerfrequency,frequencycoefficients,socommonly12,so455kHz÷12hundredthkHz38kHzhundredth379,000.Someremotecontrolsystemadopts36kHz,56kHz,etc,general40kHzlaunchedbythecrystalsofoscillationfrequencytodecide.
Infraredremotecharacteristicisnotinfluencethesurroundingenvironmentanddoesnotinterferewithotherelectricequipment.Duetoitscannotpenetratewalls,sotheroomcanusecommonhouseholdapplianceofremotecontrolwithoutmutualinterference,Circuittestingissimple,aslongasgivencircuitconnection,generallydoesnotneedanycommissioningcanwork,Decodingeasily,canundertakemultipleremotecontrol.Becauseeachmanufacturerproducesagreatdealofinfraredremoteapplication-specificintegratedcircuit,whenneedpressdiagramsuoji.Therefore,theinfraredremotenowinhouseholdappliances,indoorclose(lessthan10meters)intheremotecontroliswidelyused.
Multipleinfraredremotecontrolsystemofinfraredemissioncontrolbuttons,therearemanypartsgeneralrepresentativeofdifferentcontrolfunction.Whenpressedabutton,correspondinglyinthereceiverwithdifferentoutput.
Receivingtheoutputstatecanberoughlydividedintopulse,level,self-lockingandinterlock,datafiveforms."Thepulseoutputisaccordingtolaunch"whenthebutton,thereceiveroutputterminalsoutputcorresponding"effective",apulsewidth100msingeneral."Level"referstotheoutputlaunchpressbutton,thereceiveroutputcorrespondingoutputlevel","effectivetransmittoloosenthereceiver"level"disappears.This"effectivepulse"and"effective",maybeofhighlevelislow,andmayalsodependontheoutputcorrespondingstaticstate,suchasfeetforlow,static"high"foreffective,Asforthestatic,"low"higheffective.Inmostcases,"high"foreffective."Sincethelock"referstolaunchtheoutputofeachtimeyoupressthebutton,areceiveroutputcorrespondingchange,namelyoriginallyastateforhighlevelintoalowlevel,originallyforlowlevelintohighlevel.Theoutputpowerswitchandmuteascontroletc.Sometimesalsocalledtheoutputformfor"invert"."Theinterlock"referstomultipleoutputseachoutput,atthesametimeonlyoneoutput.TheTVsetsofthiscaseisselected,theotherislikethelightandsoundinputspeed,etc.
"Data"referstolaunchtheoutputsomekey,useafewoutputformabinarynumber,torepresentdifferentkeystroke.
Normally,thereceiverexceptafewdataoutput,butalsoa"valid"outputdata,sothetimelytocollectdata.Thisoutputformwithsingle-chipmicrocomputerorarecommonlyusedinterface.Inadditiontotheaboveoutputformoutside,stillhavea"latch"and"temporary"twoforms.Theso-called"latch"referstolaunchtheoutputsignalofeachhair,thereceiveroutputcorresponding","newstoreuntilyoureceivesignals."Temporary"outputandtheintroductionof"level"outputissimilar.
Remotedistance(RemoteControleffectofRFRemoteControldistance)arethemajorfactorsasfollows:
1,launchedinpowertransmissionpower:
whiledistance,butgreatpowerconsumption,easytogenerateinterference,
2,andreceivingthereceiversensitivity,receiving,remotedistanceincreasedsensitivitytoimprove,buteasytocausedisturbancemaloperationorabuse,
3,antenna,usinglinearantenna,andparallel,remotedistance,butoccupiesalargespace,inusetheantennaspin,pullcanincreasetheremotedistance,
4,andthehigherheight:
antenna,remotefarther,butbyobjectiveconditions,
5andstop:
currentuseofwirelessremoteuseofUHFbandstipulatedbythestate,thepropagationcharacteristicsofapproximatelineartransmission,light,small,transmittersandreceiversdiffractionbetweensuchaswallsareblockingwillgreatlydiscountedremotedistance,ifisreinforcedconcretewalls,duetotheabsorptioneffectconductor,radiowaves.
Consideringthedesignofhardwarevolumesmalltobeembeddedintheremotecontrol,sowechose20footsingle-chipchipAT89C2051.Belowistheintroductionofthefunction.
1)AT89C2051internalstructureandperformance
AT89C2051isabyteflash2Kwithprogrammableread-onlymemorycanbeerasedEEPROM(lowvoltage,highperformanceofeightCMOSmicrocomputer.ItadoptsATMELofhigh-densitynon-volatilestoragetechnologymanufacturingandindustrialstandardMCS-51instructionsetandlead.ThroughthecombinationofsinglechipingeneralCPL1andflashmemory,isastrongATMELAT89C2051microcomputer,itsapplicationinmanyembeddedcontrolprovidesahighlyflexibleandlowcostsolutions.Thecompatiblewith8051AT89C2051isCHMOSmicrocontroller,theFlashmemorycapacityfor2KB.AndCHMOS80C51process,havetwokindsofleisureandpowersavingoperationmode.Theperformanceisasfollows:
8CUP,2KBFlashmemory,
Workingvoltagerange2.7-6V,128KBdatastorage,
Thestaticworkingway:
0-24MHz,15rootinput/outputline,
Aprogrammableserial,2a16-bittiming/counters,
Thereisasliceofinsideprecisionsimulationcomparator,5theinterruptsources,2priority.ProgrammableserialUARTchannel,DirectlyLEDdriveroutput,
TheinternalstructureofAT89C2051isshowninfigure1.
Figure1
2)AT89C2051chippinandfunction
Inordertoadapttotherequirementofintelligentinstrument,embeddedinthechipfootAT89C2051simplifiedconfiguration,asshowninfigureb.Themajorchangesto:
(1)theleadfootfrom20to40wires,
(2)increasedasimulatedcomparator.AT89C2051pinfunction:
1theVcc:
voltage.
2toGND.
3P1mouth:
P1mouthisan8-bittwo-wayI/Oport.P1.2~P1.7mouthpintheinternalresistanceprovides.P1.0andP1.1requirementsontheexternalpull-upresistors.P1.0andP1.1alsoseparatelyaspieceinsideprecisionsimulation
Figure
2
comparatorwithinput(AIN0)andreversed-phaseinput(AIN1).OutputbuffercanabsorbtheP1mouth20mAcurrentandcandirectlyLEDdisplaydriver.WhenP1mouthpinintoa"1",canmakeitsinput.WhenthepinP1.2~P1.7asinputandexternaldown,theywillbefortheinternalresistanceandflowcurrent(IIL).InflashP1mouthduringtheprocedureandprogramcodedatareceivingcalibration.
4P3:
theP3.0~P3.5P3,P3.7istheinternalresistancewithseventwo-wayI/0lead.P3.6forfixedinputspieceinsidethecomparatoroutputsignalanditasageneralI/Ofootandinaccessible.P3mouthbuffercanabsorb20mAcurrent.WhenP3mouthpininto"1",theyaretheinternalresistancecanpushandinput.Asinput,andthelowexternalP3mouthpinpull-upresistorsandwillusecurrent(IIL)outflow.P3mouthstillusedtoimplementthevariousfunctions,suchasAT89C2051shownintable1.P3mouthstillreceivesomeforflashmemoryprogrammingandcalibrationofprogramcontrolsignals.P
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