Navigazione in auto

Basic notitia

Sfondo

Sincetherearehighways,therearemapsthatshowpeopletheway.However,themap,asaguideforpeople,oftenbecomesasourceoftensionbetweenpeople.Becauseprintedmapsareoftenunabletokeepupwithstreetchangesandareillegible,thedriverswillblamethepeopleinthecarfornotreadingthemapsandfailingtoprovideaccurateinstructions.Therefore,asatellitenavigationsystemthatcanusesatellitesignalsfromhighaltitudestoaccuratelyandtimelynavigateandlocatevehicleshasbecomeaninvaluabletreasure.

Inrecentyears,thedevelopmentofcarnavigationsystemshasbeenveryrapid.Atpresent,peoplecannotonlychoosethenavigationsystemasanoptionalconfigurationwhenbuyinganewcar,butalsoinstallthedeviceinanexistingcar,orevenconfigureamobilesatellitenavigationsystem,andputittherewhendrivingthecar.Inacar,ortakeittogowildormountainclimbing.

Thesatellitenavigationsystemthatguidescardrivershasthefollowing4importantfactors:satellitesignal,signalreception,signalprocessingandmapdatabase.

CarnavigationhasGPSglobalsatellitepositioningsystemfunction,allowingyoutoknowyourexactlocationanytimeandanywherewhiledriving.Carnavigationhasfunctionssuchasautomaticvoicenavigation,bestroutesearch,etc.,allowingyoutotakeashortcutandunimpededtravel.Theintegratedofficeandentertainmentfunctionsallowyoutotraveleasilyandefficiently!ThefunctionsofgeneralcarnavigationincludeDVDplayer,radioreceiver,Bluetoothhands-free,touchscreen,optionalfunction,intelligenttrajectoryreversing,tirepressuredetectionfunction,virtualsix-disc,backgroundcontrolfunction!

Detailedclassificationofnavigation

Carnavigationcanbeclassifiedaccordingtothefollowingaspects.

1.Navigationclassificationbyvehicletype:

1.Special-purposeDVDnavigationforspecialvehicles:Onemachineisspeciallyequippedforonevehicletype(mostlyneedtoremovetheoriginalcarCD)

2.Universaltype: framecanbemodifiedforvariousmodels

3.Splitmachine:specialcarnavigationsubdivisionproducts,withoutremovingtheoriginalcarCDandotherparts,upgradingDVDnavigationproducts

2.Navigationclassificationbyfunction:

I, traditionalhandwritingnavigation

2, vox-activatednavigation:

1), real-personsecretary service voice-activatednavigation;

a.Bluetoothone-touchvoice-activatednavigation

Advantages:Directlyusethemobilephone'sBluetoothtoconnectwiththecarnavigationhost.AftertheBluetoothisconnectedforthefirsttime,itwillbeautomaticallyconnectedlater.Thesignalisstableandthequalityisreliable;

b, plusacommunicationbox for voice-activatednavigation;

Incommoda:plusacommunicationbox,itssignalreceivingmoduleisincomparablewithamobilephonesignalreceivingmoduleofseveralthousandyuanYes,wheninapoorsignalarea,themobilephonehasasignalbutthecarnavigationmaynotnecessarilyhaveasignal,sothismethodislikelytocausemorecustomercomplaints.Inaddition,comparedtotheBluetoothone-keycommunication,itneedstobeequippedwithacommunicationboxandaphonecard,whichisverytroublesome;

2) homo-machinedialogue-vox-navigationis moderatus;

Incommoda:therecognitionrateofvoicerecognitionsoftwareisnothigh;

Systemfunction

Thevaria partes vectionis et navigationis ( 1 ) Electronicmapcapableofnavigation(2)Searchand processing ofmapdata(3) Positioningmodule(4)) Mapratio(5) Praescripta ambulatio(6) Routeguidance(7) Mapreal-timedisplaymodule(8) Humanum-computationum interactio(9) Wirelesscommunicatio

Introductiontothefunctionalmodule

GPSnavigationsatelliteaccuratepositioning,bestpathsearch,automaticvoiceprompts.

NavigationmodeMultiplepurposeinput,morethanfivecustomizedpathretrievalmodes,sitesettingmode,andmappositioningmode.

NationalMapProvideselectronicmapsofthousandsofcitiesacrossthecountry,andprovidesthelatestmapsupport.Thenavigationismorepreciseandallowsyoutogounimpeded.

PathplanningProvidesthepathplanningofthedepartureanddestination,andsetsthefunctionofpassingandavoidingpoints.

VoicepromptsThevoicepromptsarekindandreal,andtheroadnameisautomaticallybroadcastedwhiledriving.

MusicappreciationEnjoyaudio-visualenjoymentandrelievefatigue.

FilemanagementPowerfulresourcemanagementfunctions.

Positioningprinciple

Navigationprinciplebasedontrackestimation(DRS)

Asearlyastheendofthe1970s,peoplebegantostudyon-boardpositioningandnavigationInthatera,thespecificlocationofthevehicleandhowtoreachthislocationweredeterminedbydeductionandcalculationofthetrajectoryandtheratioofthemap.Trackestimation(DRS)essentiallytreatsthedrivingofavehicleasatwo-dimensionalplanemotion.Accordingtoitsstartingpositionandtheinitialangle,thechangesinthelengthandtheangleofthevehiclearemeasuredatalltimes,andthenthemapisusedforratioTocalculateandestimatethelocationofthevehicle.However,thismethodisdifficulttoimplement,andtheaccuracyrateisnothigh,buttheresearchonDRShaslaidthefoundationforsubsequentscientificresearch.

NavigationprinciplesbasedontheGlobalPosioningSystem(GPS)

Inthelate1990s,thefieldfrequencyoftheITindustrywasconstantlyupdated,thesatellitetechnologywasgraduallymature,andthecommunicationfacilitieswerealsograduallydeveloping,Thusinventedthesatellitepositioningsystem.Amongthem,theUnitedStates'globalpositioningsystemisthebest.

GPSiscomposedof24workingsatellites.Itislocatedatadistanceof20,200kmfromtheearth'ssurfaceandisevenlydistributedon6orbitalplanes(4foreachorbitalplane)withanorbitalinclinationof55°.Inaddition,thereare4activebackupsatellitesinorbit.Thedistributionofsatellitesmakesitpossibletoobservemorethan4satellitesanywhereintheworldandatanytime,andtomaintainageometricimagewithgoodpositioningaccuracy.Thisprovidescontinuousglobalnavigationcapabilitiesintime.

Becausethepositionofthesatelliteisaccurate,wecangetthedistancefromthesatellitetothereceiverintheGPSobservation.Accordingtothedistanceformulainthethree-dimensionalcoordinate,using3satellites,3equationscanbeformed.Outthepositionoftheobservationpoint(X,Y,Z).Consideringtheerrorbetweenthesatellite'sclockandthereceiver'sclock,thereareactually4unknowns,X,Y,Zandtheclockdifference.Therefore,itisnecessarytointroduceafourthsatellitetoform4equationstosolve,soastoobtaintheobservationpointLatitudeandlongitudeandelevation.

Infact,thereceivercanoftenlockmorethan4satellites.Atthistime,thereceivercanbedividedintoseveralgroupsaccordingtothesatelliteconstellationdistribution,eachgrouphas4,andthenthealgorithmselectsthesmallesterrorOnesetisusedforpositioning,therebyimprovingaccuracy.

Duetotheerrorsinthesatelliteorbitandsatelliteclock,theinfluenceoftheatmospherictroposphereandionosphereonthesignal,andtheartificialSAprotectionpolicy,thepositioningaccuracyofcivilianGPSisonly100meters.Inordertoimprovepositioningaccuracy,differentialGPS(DGPS)technologyisgenerallyusedtoestablishareferencestation(differentialstation)forGPSobservations,andusetheknownprecisecoordinatesofthereferencestationtocomparewiththeobservationstoobtainacorrectionnumberandreleaseittothepublic.Afterthereceiverreceivesthecorrectionnumber,itcompareswithitsownobservations,eliminatesmostoftheerrors,andobtainsamoreaccurateposition.ExperimentsshowthatbyusingdifferentialGPS,thepositioningaccuracycanbeincreasedto5meters.

AftertheadventofGPS,ithasprovidedtechnicalsupportforaccuratepositioningtocountriesaroundtheworld.Satellitepositioninghasimprovedaccuracyrelativetotrackestimation.ThroughGPSandtrackestimationtechnologies,thepositioningaccuracycanreach1cm,whichcompletelyrealizesprecisepositioning.Moreover,theEuropeanUnionhasalsoestablisheditsownscientificresearchqueuefornavigationandpositioningsystems,knownastheGalileoProject.DuetothehighaccuracyofGPSanditshighqualityandlowprice,manydepartmentsandgovernmentsusethispositioningtechnology.Inaddition,thetechnologythatdeterminesthespecificlocationbasedonthemobilecommunicationnetworkandthelocationbasedontheretinaofthehumanbodyisoftenusednow.Thesetechnologiesmustbeorganizedandusedinanorderlymannerandcannotbeusedalone.

Compositio

Thecarnavigationsystemismainlycomposedofanavigationhostandanavigationdisplayterminal.Thebuilt-inGPSantennawillreceivedatafromatleast3ofthe24GPSsatellitesorbitingtheearthtodeterminethecurrentpositionofthecar.ThepositioncoordinatesdeterminedbythenavigationhostthroughGPSsatellitesignalsarematchedwiththeelectronicmapdata,andtheaccuratepositionofthecarintheelectronicmapcanbedetermined.

Onthisbasis,variousfunctionssuchasdrivingnavigation,routerecommendation,informationquery,andAV/TVplaybackwillberealized.Thedriveronlyneedstowatchthescreenonthedisplay,listentothevoiceprompts,andmanipulatetheremotecontrolinhishandtoachievetheabovefunctions,thusdrivingthecarfreely.

CarGPSnavigationsystemiscomposedoftwoparts:

OnepartiscomposedofGPSreceiveranddisplayequipmentinstalledonthecar;theotherpartiscomposedofcomputercontrolcenter,andthetwopartsarepositionedthroughpositioningSatellitecontact.

Thecomputercontrolcenterisauthorizedandestablishedbythemotorvehiclemanagementdepartment.Itisresponsibleforobservingthedynamicsandtrafficconditionsofthedesignatedmonitoredcarsinthejurisdictionatanytime.Therefore,theentirecarnavigationsystemhasatleasttwomajorfunctions:oneisCartrackmonitoringfunction,aslongasthecodedGPSreceiverisinstalledonthecar,thecarcanindicateitslocationthroughtheelectronicmapofthecomputercontrolcenternomatterwhereitisdriving;theotheristhedrivingguidefunction,theownercanStoretheelectronicmapsofthetrafficlinesineachareaonafloppydisk.Aslongasthefloppydiskisinsertedintothereceivingdeviceonthecar,thedisplaywillimmediatelyshowthelocationofthecar’sareaandthecurrenttrafficstatus,andyoucanenterthepurposeofgoing.Thebestdrivingrouteispre-programmed,andthecomputercontrolcentercanacceptinstructionstoselecttherouteanddirectionofthecar.

Systemementa

Satellitesignals

CarsatellitenavigationsystemsneedtorelyontheGlobalPosioningSystem(GPS)todeterminethelocationofthecar.Themostbasic,GPSneedstoknowthelongitudeandlatitudeofthecar.Insomespecialcases,GPSneedstoknowthealtitudetoaccuratelylocate.Withthesethreesetsofdata,theaccuracyofGPSpositioningcanoftenreach2to3meters.

BecauseGPSrequiresthecarnavigationsystemtoworkwithinthedirectlineofsightofthesynchronoussatellite,tunnels,bridges,orhigh-risebuildingswillblockthedirectlineofsight,makingthenavigationsystemunabletowork.Furthermore,thenavigationsystemusesthelawsoftriangleandgeometrytocalculatethepositionofthecar,sothecarmustbeunderthesightofthreesynchronoussatellitesatthesametimetodeterminetheposition.Themoresynchronoussatelliteswithinthedirectlineofsightofthenavigationsystem,themoreaccuratethepositioning.Ofcourse,mostofthesynchronoussatellitesareoverdenselypopulatedmetropolises,sowhenyouarefarawayfromurbanareas,theeffectofthenavigationsystemwillnotbetoogoodorevennotworkatall.

Signalprocessing

TheworkingprincipleoftheGPSsystemistoanalyzethesignalreceivedfromthesynchronoussatellite.Projectedonaverticalplane,thesesignalscanbevisuallyrepresentedasaninvertedfunnel.Whenthelowerhalfofthese"funnels"overlaptoacertainextent,theGPSparsingprogramcancalculatethecoordinatesofthecar'slocation.Intheprocessofdrivingacar,adevicesimilartoagyroscopeusedinairplaneorshipnavigationcancontinuouslyprovidethepositionofthecar.However,whenthesatellitesignalisinterrupted,thedataprovidedbythespeedometerisusedtofillthegapandrecordthetraveltime.

Mapdata

Thenormaloperationofthenavigationsystemdependsonwhetherthenavigationsystemisperfect.Thenavigationelectronicmapmainlyincludestwoaspects.Thefirstisthatweneedtousethemapanditmustbeelectronic,andwemustfindwaystoimproveitsaccuracy;thesecondistodisplaytheelectronicmapattheactualtimewhenthingshappen,ifyouwanttomaketheelectronicmapToachievereal-timedisplay,itisnecessarytocleverlycombineelectronicmapdataandhigh-performanceindexingmechanism.Onlyinthiswaycanthedriverbeguidedthroughnavigation.Moreover,thedevelopmentofthismapisnowanurgentmatter,anditisalsothebasisforcompletingthecarnavigationsystem.

WhenthecoordinateinformationprovidedbyGPSissuperimposedontheelectronicmap,thedrivercanseehiscurrentpositionandfuturedirection.Thislastlinkiscalledmapping,anditisalsothemostimportantlinkinthecarnavigationsystem.Leavingthefinishedpicture,thenavigationsystemisequivalenttonodirection.

Themapdatabasecomesfromavarietyofsources,amongwhichthemainsourceistheblockdatabaseprovidedbythecitygovernmentagency.Foragoodcarnavigationsystem,thenumberofmaps,accuracy,andtimelinessofdataareallimportant.NomatterhowaccuratethecoordinatelocationprovidedbyGPSis,ifyournavigationsystemcannotprovideamapofyourarea,orthemapprovidediswrong,yoursystemcanbesaidtobeworthless.Therefore,whenbuyingacarsatellitenavigationsystem,payattentiontothefollowing:

First,checktheaccuracyofthetestsystem.Chooseoneortworoadsectionsthatyouarefamiliarwith,oranewlyopenedhotel,andseeifthesystemcanaccuratelydisplaythelocationofthecar.Becausestreetsandroadsectionsarealwayschanging,yoursystemmustalsoprovideregularupdateservices.

Second,considerthestoragecapacityofthesystem.IntheUnitedStates,ifyousaveallthemapsofthecountry,youneedatleastthreediscs.Therefore,thecarnavigationsystemmustalsohaveacorrespondinglylargeharddiskmemory.

Third,theimageisdisplayed.Theimagedisplayofthecarnavigationsystemcanbeinstalledonthedrivingdashboardofthecarorprojectedontothescreenofalaptopcomputerorevenapalmtopcomputer.Inordertoadapttodifferentweatherandlightconditions,theimagedisplayscreenmusthaveenoughbrightness,butalsohaveenoughsizeandgoodresolution.

Filecompositionofthemapindex

Itisessentialtonavigatetheelectronicmapinthecarnavigationsystem,andrealizethemassivemapdataontheembeddeddeviceFastaccessstillhascertainlimitations,anditisalsoverytrickyindesign.Onlybycreatingafastandefficientspatialsearchsystemcanthisproblembecompletelysolved.Wehavetoselectamapinadvance,andafterefficientlycompletingthedeterminationofthemapstyle,duetotheformatofthemapdataofthenavigationsystem,anewestcalculationmethodisproposed,whichistheso-calledHilbert-Rtreeindexmethod.Afterthat,Ispecificallydescribedhowtocompletethisalgorithm,andusedpseudo-codetodemonstratetheestablishmentandoperationofthisalgorithm.

Realizationofmapzoomoperation

Mapzoomisembodiedintwoaspects,oneofwhichisfixed-pointzoom,andtheotherisframezoom.Thiszoomcanbecompletedbychangingthepositionofthemouseandspecifyingthezoomfactorandtheinitialpositionofthegraphagain.Youcandrawatanytimeaccordingtoyourwishesandtime.Thisdrawingmethodcanbeachievedbyroaming.

Theprincipleofnavigatorprojectiontechnology:

Thebiggestfeatureofperspectiveprojectionisthatallraysareprojectedonlyfromthecenterpoint.Theprojectionessentiallyreferstothepointofn-dimensionalspace.Asthenumberdecreases,peopleusuallyconvertpointsinathree-dimensionalspacetoatwo-dimensionalplane.Projectiontransformationreferstothisprocess.

Intheprocessofprojectionconversion,itisdeterminedwhethertherearelimitationsbasedonthelengthandcenteroftheprojection,soitisdefinedasparallelprojectionandpositioningprojection.Ifthedistancebetweentheprojectioncenterandtheplaneislimited,itiscalledaperspectiveprojection,otherwiseitisaparallelprojection.Usuallytheprojectionsurfaceislocatedbetweentheobserverandtheobject.Thepointwheretheviewpointandtheobjectintersectontheprojectionsurfaceistheperspectiveprojectionoftheobjectontheprojectionsurface.However,perspectiveprojectionessentiallydemonstratestheprocessofordinarypeopleseeingthingswiththeireyes.Itisequivalenttotheobject,thepupilissimilartotheviewpoint,andtheretinaissimilartotheprojectionsurface.Theperspectiveprojectionofthesameobjectfromdifferentdirectionsissimilartopeopleviewinganobjectfromdifferentpositionsorangles.Therefore,itcanbeconcludedthattherearetwowaystoobtainaperspectiveviewofthesameobjectfromdifferentangles:

Thefirstmethodistokeeptheobjectpositionunchanged,andtheviewpointshouldbearoundintheusercoordinatesystemTheobjectchangesitspositioninspaceoronasphericalobjecttoobtainperspectiveviewsoftheobjectfromvariousangles.

Thesecondmethodistokeepthepositionoftheviewpointunchanged,andtheobjectisconvertedintheobserver'scoordinatesystemtoobtainthemappingoftheobjectateachangle.Afteranalysis,wefoundthattheconclusionsofthemethodsmentionedabovearenotallthesame,butbecauseinthissystem,theviewpointismovingtothemap,butthemapisindeedstatictotheviewpoint,sothefirstmethodisgenerallyadopted.

Systemclassification

GPSvehicleapplicationsystemsaregenerallydividedintotwocategories:vehicletrackingsystemsandvehiclenavigationsystems.Theyarecompletelydifferentinfunction,oneisusedforvehicletheftprevention,theotherisusedforvehicleautonomousnavigation.SinceGPSisamajorfeatureofthereceivingsystemas"receiveonly,nottransmit"signals,theGPStrackingsystemusedforanti-theftistousethecommunicationnetworkandgovernmentsupportingsystemstoprovideGPSvehicleanti-theftdevicesandprovidesolutionsforchargingusagefees.Thecarnavigatorreceivessatellitesignalsandcooperateswithelectronicmapdatatograspitsownpositionanddestinationinatimelymanner.Theautonomousnavigationmodedoesnotchargeanyusagefees,anduserscanselectivelypurchasemapdataaccordingtotheirneeds.

GPStechnologyisreceivedbyusingGPSsatellitesignals.Itcanreceivedataparameterssentbysatellites24hoursaday,andsettlethereceivedthree-dimensionalposition,three-dimensionaldirection,andmovementspeedandtimeinformation.Thecarnavigatorreceivessatellitesignalsandcooperateswiththeelectronicmapdatatograspone'sownpositionanddestinationinatimelymanner.Theautonomousnavigationmodedoesnotchargeanyusagefees,anduserscanselectivelypurchasemapdataaccordingtotheirownneeds.WhentheuserinstallsthecarGPSonthecar,nomatterwhichcity,townorsuburbtheuserisin,wecanfindarestaurantorthenearestgasstationinaninstant.

GlobalPosioningSystem

TheGlobalPosioningSystem(GPS)isanewgenerationofspacesatellitenavigationandpositioningsystemjointlydevelopedbytheUnitedStatesArmy,NavyandAirForceinthe1970s.Itsmainpurposeistoprovidereal-time,all-weatherandglobalnavigationservicesforland,sea,andair,andformilitarypurposessuchasintelligencecollection,nuclearexplosionmonitoring,andemergencycommunications.ItisanimportantcomponentoftheUnitedStates'globaldominancestrategy.Aftermorethan20yearsofresearchandexperimentation,atacostof30billionU.S.dollars,byMarch1994,24GPSsatelliteconstellationswithaglobalcoveragerateof98%hadbeendeployed.

Theglobalpositioningsystemiscomposedofthreeparts:(1)Thegroundcontrolpart,whichconsistsofthemaincontrolstation(responsibleformanagingandcoordinatingtheworkoftheentiregroundcontrolsystem),thegroundantenna(underthecontrolofthemaincontrolstation,Injectingtelegramsintosatellites),monitoringstations(automaticdatacollectioncenters)andcommunicationauxiliarysystems(datatransmission);(2)thespacepart,consistingof24satellites,distributedon6planes;(3)userequipmentThepartismainlycomposedofGPSreceiverandsatelliteantenna.

Themainfeatures of the globalpositioning system: (1) omnis tempestas; (2) globalcoverage; (3) tres dimensiones-celeritates et summae diligentiae;(4) ieiunium, tempus salutaris et efficacia:(5) late functiones.

Themainpurposeoftheglobalpositioningsystem:(1)Landapplications,includingvehiclenavigation,emergencyresponse,atmosphericphysicalobservation,geophysicalresourceexploration,engineeringmeasurement,deformationmonitoring,crustalmovementmonitoring,municipalplanningcontrolEtc.;(2)Marineapplications,includingthebestvoyageroutedeterminationofocean-goingvessels,real-timeshipdispatchingandnavigation,marinerescue,marinetreasurehunting,hydrogeologicalsurvey,marineplatformpositioning,sealevelriseandfallmonitoring,etc.;(3)Aerospaceapplications,Includingaircraftnavigation,aviationremotesensingattitudecontrol,low-orbitsatelliteorbitdetermination,missileguidance,aviationrescueandmannedspacecraftprotectionanddetection.

Therearemany types ofGPSsatellitereceivers.According to themodel,intogeodetic, totalstation, sincere, handheld, andintegrated, Space-bomb-bomb-feruntur.

Post plusquam XX annos usus, GPS systematis est alta praecisio, omnis tempestas et gloalradionavigation, positio et timing multifunctionalsystem.GPStechnology has developedintoa multi-ager, multi modus, multi propositi, et multi-modelinternationale summus ars.

Mapquery

Youcansearchforthelocationofyourdestinationontheoperatingterminal.

◎Youcanrecordthelocationinformationoftheplacesyouoftengoto,andkeepit,andyoucansharethelocationinformationwithothers.

◎ Vaguelyqueryinformationsuchasgasstationum, hotels, nummorum, etc.

Routeplanning

WhenyoudonotpressWhenyoudriveontheplannedrouteorgotothewrongintersection,theGPSnavigationsystemwillre-plananewroutetoyourdestinationbasedonyourcurrentlocation.

◎TheGPSnavigationsystemsystemautomaticallyplanarouteac secundum punctum et destinationyouset.

Cogitationes extracans, an per puncta quaedam.

◎Theplanningroutecanbesetwhethertoavoidhigh-speedandotherfunctions.

Voicenavigation

Usevoicetoprovidedriverswithdrivinginformationsuchasintersectionsteering,navigationsystemstatus,etc.,justlikearoad-knowingguidetellsyouhowtodrivetoyourdestination.Oneofthemostimportantfunctionsinnavigationallowsyoutosafelyreachyourdestinationthroughvoicepromptswithoutwatchingtheoperatingterminal.

Screennavigation

Ontheoperatingterminal,themapwillbedisplayed,aswellasthecurrentlocationofthecar,drivingspeed,distancetothedestination,plannedrouteprompts,anddrivinginformationpromptsforintersectiondirections..

Incommoda

Carnavigationoftenmisleadscarowners

TherearemanycarownerswhoaremisledbycarGPS.Forexample,someremoteareascan'tbefoundonthenavigationmap,orthecarownersaremisledby"changingthecrownandLiDai";sometimesthenavigationmap"seeksfartheraway"ontheroadthatcanbereachedthroughastreet,andtakesthecarownerforalongcircle.ThecurrentcarnavigationisbasedonGPStechnologyforpositioning,butGPScannotbe100%positioning.GPSisnotlikeamobilephonebroadcast,whichcanreceivesignalsanywhere.ManythingswillaffectGPSreception,includingthedistributionofskystars,buildings,viaducts,radiowaves,leaves,andthermalpaper.GPSpositioningisgreatlyaffectedbyexternalfactors.Generallyspeaking,theareaof​​theskythatcanbeseenfromtheGPSpositionistheareawhereGPScanreceivesignals.

Shoppingdetails

Inthecurrentautomotiveelectronicproducts,carDVDnavigationaccountsforanincreasingproportion,andnearly40%ofnewcarownershavetheneedtoinstallcarDVDnavigation.Therefore,alargenumberofproducedandOEMDVDnavigationproductshaveemerged,andthedifferenceinproductqualityisbeyondyourimagination.

AssoonasmanyDVDproductsareinstalledinthecar,theywillscreamassoonastheystepontheaccelerator,andthesoundandimagesareverypoor.Therefore,39AutoPartsNetworkremindsconsumerswhenbuyingcarDVDnavigationproductsPayattentiontothefollowingthreedetails:

SoundQuality

DVDisusedtoplaymusic,sothesoundqualityisveryimportant.Therefore,beforebuyingaDVD,youmustaskclearlywhatisthe"V"ofthefrontoutputofthisDVDplayer,orcomparethesoundqualityofthisDVDplayerwithotherDVDplayers.IfthesoundqualityofaDVDplayercancomparewiththesoundqualityofaCDplayer,thepricewillofcoursenotbemuchcheaper.

ImageandDVDplayerdistribution

TherearetwotypesofDVDscreens:analogscreenanddigitalhigh-definitionscreen.Thepixelsofanalogscreensaregenerally240*240or480*240pixels,whilehigh-definitionscreensaregenerally800*480pixelsorhigher.Inaddition,goodDVDsareequippedwithdualopticaldrives,thatis,DVDandCDopticaldrives.

Navigationaccuracyandeaseofuse

GoodDVDmanufacturerswillusebetternavigationboardsandgenuinemapcards,butpoorDVDnavigationItiseasytocrashduringnavigation,thespeedofretrievingsatellitesfornavigationisslow,andtheaccuracyofnavigationisrelativelypoor.Atpresent,theinternalcircuitstructureofthenavigatorcanbeoptimizedandreasonable,andthenavigationproductsprovidedbymanufacturerswithhighhardwareconfigurationhavefastnavigationspeed,highaccuracyandeasyuse.

Mapupgrade

Themapupgradeofthecarnavigationsystemwillbeupgradedaccordingtotheopendataprovidedbythemapsurveyingandmappingcompanythatthenavigatorspecificallyselectsanduses.Thefrequencyandupgradetimeofeachmapsurveyingcompanyareuncertain.MapversionsofKayLide,DaoDaoTong,IntercityExpress,andGaodehaveahigherusagerateinChina.Relevantinformationwillbereleasedontheofficialwebsitesofmajormapcompaniesintime.

Howtouse

Aboutsearchstars

AllGPSindoorscannotreceivesatellitesorthesignalisveryweak,only

Carnavigation (11photos)

Thesignalcanonlybereceivedoutdoors.Thisiscommonsense.Thecorrectwaytosearchforthesignalis:

1.Keepsearchingforsignalsanddon'tmovearound,becausewalkingaroundGPSisnoteasytolocate.

2.Turnonthemachinetothenavigationinterface,clickonthesignalsymbolintheupperrightcornerofthenavigationinterface,youcanseethenumbermapofsatellitesaccepted,normal3positioning,5navigation.

3.OpentheGPSreceivingsatellitesignalmoduleontheupperrightsideofthebackofthemachineata90-degreeangletothemachinetoreceivethesignalbest.

4.Speed​​ofreceivingsignal:Twoconceptsareinvolved

(1)Themeaningofcoldstart:thefirstGPSsearchforsatellitesiscalledcoldstart,whichisusuallyslow.

DifferentGPSsearchspeedsaredifferent.SomeGPScoldstartsearchesforsatelliteswithin1minute,someare1minuteaway,about1minuteto2minutes,andsomeare2minutesaway.

(2) Themeaingofhotstart: restartwithin2hoursishotstart,hotstartisthefastest,

usuallythesatelliteissearchedin1-2seconds.2hoursto4hoursiswarmstart

Abouttheelectronicdog

Currently,alltheelectronicdogfunctionsinGPSareequippedwiththisfunctioninthenavigationmap,thatis,theelectronicdogmapisequippedinthemachine."Anti-speedradarisanationalbannedproduct,anditisalsobannedonTaobao.》ThefunctionsoftheelectronicdoginGPSareasfollows:

1.TherearespeedmeasurementinformationpointsatintersectionsontheGPSmap,andtheGPSwillalertyoubyvoice.

2.Ifthereisnoinformationpointformeasuringspeedinthemap,itwillnotremindyou.Soyoucan'trelysolelyonGPStoreversespeedmeasurement.Thereisagoodwaytohelpyousolveit:youcansetthespeedyourselfintheGPS,andtheGPSwillvoiceremindyoutodriveatthespeedlimitifyouexceedthespeed.

Maintenancemethod

1.Correctoperation

Theaboveisfromthemaintenanceaspect.Inaddition,correctTheuseofisalsoveryimportant.Aftertheuseisover,thecarnavigationshouldbeturnedofffirst,andthenturnedoff.Neverturnoffthemachine,althoughitsavestrouble,butafteralongtimeitwilleasilydamagetheelectroniccomponents.

Inaddition,donotletthenavigationscreentouchsharpobjects.Atthesametime,trytoavoidexposureofthecenterconsoletothesun.Thelargetemperaturedifferencenotonlyaffectsthebatterylifeofnavigation,butalsoaffectsthetouchsensitivityoftheLCDscreen.

Secundo, quotidianum sustentationem

Indailyuse,ifyoudonotpayattentiontotheoperation,itiseasytobringdusttothenavigation.Infact,itisconsideredinthedesignprocessnowTheproblemofdustpreventionhasbeenrelativelyreducedcomparedtobefore,andmorepeoplewillchoosetodirectlyusetheUSBinterfaceformusicplayback.Aslongaswepayattentiontocovertheprotectivecoverintimeduringnormaluse,itwilleffectivelyblocktheentryofdust.Thelaserheadoftheopticaldiscisafragilepartandmoreexpensive.Ifafailureoccurs,pleaseaskaprofessionaltodealwithit.Thebuttonsandknobsonthepanelcanbecleanedwithasmallcottonswaborthelike.

3.Waterproofandmoisture-probatio

Electronicequipmentisafraidofwater.Waterproofandmoisture-proofisamust.Whenwashingthecar,remembertoclosethedoortightly..Whencleaningtheinteriorofthecar,becareful.Ifyouneedtowipe,trynottohavetoomuchwateronthetowel,letalonespraywaterwithawateringcanorsprayitwithliquidssuchasdetergents.Aftercleaning,itisbestWipeitagainwithasoft,drytoweltopreventthenavigationfrombeingwetandaffectnormaloperation.Youcanalsoventilatethedoorsandwindowsofthecartoevaporatethemoistureinthecarandthencloseit.Thisisnotonlyhelpfulforcarnavigation,butalsohelpstokeepthecarinteriordryandpreventthegrowthofbacteria.

Inadditiontopayingattentiontocorrectoperationandmaintenanceduringdailyuse,itisalsoimportanttochooseareliablecarnavigationbrand.Well-knowncarnavigationmanufacturerscannotonlyprovidehigh-qualitycarnavigation,butalsoThecarownerprovidesavarietyofcomprehensiveafter-salesservicestomakethenavigationtrulypractical.Thecarnavigationisasophisticatedinstrument,andthedatainsideshouldbeupdatedandupgradedintimetofacilitatetheowner'suse.

Four.Correctoperation

Tooperatecorrectly,otherwiseitwillaffecttheGPSservicelife.Thecorrectoperationmethodis:

1.Whenusing,youmustfirstturnoffthepageandthenturnoffthedevice,andyoucan’tturnoffthedevicedirectlywithoutclosingthepage.Thatisanillegaloperation.

2,themachineshouldbechargedforabout10hoursthreetimesbeforeuse,sothatthebatterystoragecapacitycanbefullyutilized.

3.Startthecarfirst,thenpluginthecigarettelighterpowersupply.Afterthenavigation,unplugthecigarettelighterandplugitinagainafterthecarisstartednexttime,whichwillhelpprotectthebatteryofthemachine.

Developmenttrend

Theneedsofsocialtechnologyhavepromotedtherapiddevelopmentandmaturityofcarnavigationsystemsinrecentyears.Manyforeignnavigationmanufacturershavecontinuouslydevelopedvehiclesthatmaketheworld’seyesshine.Thenavigationsystemnotonlyimprovestheaccuracyofpositioning,italsohasmoreandmorepowerfulfunctions.Thefollowingisanexcellentcarnavigationsystemabroad.

ThemainofficeofGARMINisinKansas,USA.ItisthemostmagnificentandmostprofessionalnavigationGPSmanufacturer.STPIII"Dowhateverittakes"isforit.Itsupportsvoiceoperationandcanbeusedinvehicles.Navigationequipmentcanintelligentlyselectroads,performvoicenavigationoperations,searchandfind,andcontainsworldmaps.Thereareevenrecordsofplaceswhereeachcountrycandriveortravelbyboat,whichcovers30routesAndmorethan2,000trackpoints.

Examplesofnavigationequipment

China'sXinkespecializesintheproductionanddevelopmentofcarnavigation,whichcanuseGPSforsatellitepositioningtogototheplacewethinkof;italsoprovides4formsofwalkingroutemodes,Whicharethereferenceroute,thespeedfirst,thedistanceandtheordinaryroute.Theroutewillbecalculatedbasedontheroutenavigatorthathasbeenset;theroadinformationincludestwo-way,no-godirection,no-gotime,no-pass,no-turnAndsoon,youcanlistentoyourfavoritemusicthroughSDcardMP3;BeijingHuituhasdevelopedasystemcalledTopMapCEGenius,whichcanbeoperatedonaminicomputer,andcanmapwithoutlimitationanduseGPStechnologytocollectoutdoorgeologicalinformation.data.Uptonow,althoughmycountry'scarnavigationsystemhasagooddevelopmentprospect,itisrelativelyslowduetoresearchfindings.Itisstilllaggingbehindothercountries.Atpresent,manydomesticscientificresearchinstitutionshavealsodevelopedmanynewnavigationsystemsandachievedgoodresults.SmartInHandisasoftwaredevelopedbyBeijingLingtuSoftwareTechnologyCo.,Ltd.,whichcandisplaygeographiclocationandinformationonmobiledevices.

Futuredevelopmenttrend

Informationterminalshavethreetypicalshortcomings:inabilitytoreflectinformationallthetime,insufficientinformationcontent,andtooindependentinformation.TheGPSnavigationsystemwillbecomeacomprehensiveserviceterminal,whichhasbothnavigation,leisureandentertainment,communicationandinformationdeliveryfunctions.ThemaindevelopmenttrendinthefutureistocleverlycombinevehicleGPSnavigationtechnologyandautomotiveelectronicstechnology.

Verus-timeinformationterminal

VehicleGPStechnologycanreleasethelatestdynamictrafficconditions,driver’sdrivingconditions,watchmovies,recordreversingconditions,andInthecar,youcanmakephonecalls,usecomputersforofficework,andalsohavenetworkcoverage.Realizingreal-timeinformationterminalsisalsoindispensable.

Diversificationofinformationterminals

CarGPSnavigationsystemcanalsopreventthecarfrombeingstolen,anditcanalsounderstandthelocationofthestolencarandwhetherithasbeentransferredtoanotherlocation,etc..Anditcanalsodevelopotherfunctions,suchasusingamobilephonetooperatethenavigationsystem,storesomeinformationorlearnaboutsurroundingnews.Itcanmeetpeople'sall-roundinformationneedsindailylifeandlearning.

Convergenceofinformationterminals

Becauseofthelimitedstorageresourcesandspaceofthemassesofsmartphones,thenavigationeffectofthemobilephonesisnotgood,anditislikelytobebiasedtowardspureonlineservices.Mostofthemarelow-endconsumergroups,sotheonlineservicecenterisnolongerpurenavigation,butalsosupportsviewinggeographiclocation,surroundingenvironment,real-timeinformation,anddeeperinformation.Whenthenumberofusersgraduallyincreases,advertisementsaboutitsserviceswillincrease,anditmaybringconsiderablerevenue.Andalsorealizedthecombinationofin-vehicleinformationterminal.

Inthefuture,theInternetwillfocusonscientificresearchonintelligentinformationterminalservices.ItwillalsomakefulluseofthefavorablesituationoftheInternetinreal-timeinformationandin-depthinformationmining.Sparingnoefforttodevelopthisresearch,withthelessonslearnedfromtheUnitedStatesandallEuropeancountries,China'sPNDmarketwillincreaserapidlyinthenextfewyearsanddecades.Ifyouwanttobeatopdomesticenterpriseandbecomealeaderinthemarket,pricing,quality,andservicestandardsmustbemutuallyrestricted,sothatthePNDmarketcanbebroughttogethermorequickly.

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