Основна информация
Заден план
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!
Подробна класификация на навигацията
Carnavigationcanbeclassifiedaccordingtothefollowingaspects.
1. Навигационна класификация по тип превозно средство:
1.Special-purposeDVDnavigationforspecialvehicles:Onemachineisspeciallyequippedforonevehicletype(mostlyneedtoremovetheoriginalcarCD)
2. Универсален тип: рамката може да бъде модифицирана за различни модели
3.Splitmachine:specialcarnavigationsubdivisionproducts,withoutremovingtheoriginalcarCDandotherparts,upgradingDVDnavigationproducts
2. Навигационна класификация по функция:
1, традиционна ръкописна навигация
2, гласово активирана навигация:
1),секретарска услуга с реално лице-активирана с глас навигация;
a.Bluetoothone-touchvoice-activatednavigation
Advantages:Directlyusethemobilephone'sBluetoothtoconnectwiththecarnavigationhost.AftertheBluetoothisconnectedforthefirsttime,itwillbeautomaticallyconnectedlater.Thesignalisstableandthequalityisreliable;
b, плюс комуникационна кутия за гласово активирана навигация;
Недостатъци:plusacommunicationbox,itssignalreceivingmoduleisincomparablewithamobilephonesignalreceivingmoduleofseveralthousandyuanYes,wheninapoorsignalarea,themobilephonehasasignalbutthecarnavigationmaynotnecessarilyhaveasignal,sothismethodislikelytocausemorecustomercomplaints.Inaddition,comparedtotheBluetoothone-keycommunication,itneedstobeequippedwithacommunicationboxandaphonecard,whichisverytroublesome;
2),диалог човек-машина, управлявана с глас навигация;
Недостатъци:therecognitionrateofvoicerecognitionsoftwareisnothigh;
Функция на системата
Различните части на системата за позициониране и навигация на превозното средство: (1) Електронна карта с възможност за навигация (2) Търсене и обработка на картографски данни (3) Модул за позициониране (4)) Карта (5) Предписана пътека за ходене (6) Насочване по маршрут (7) Модул за показване на карта за реално време (8) Интерфейс за взаимодействие човек-компютър (9) Безжична комуникация
Въведение във функционалния модул
GPSnavigationsatelliteaccuratepositioning,bestpathsearch,automaticvoiceprompts.
NavigationmodeMultiplepurposeinput,morethanfivecustomizedpathretrievalmodes,sitesettingmode,andmappositioningmode.
NationalMapProvideselectronicmapsofthousandsofcitiesacrossthecountry,andprovidesthelatestmapsupport.Thenavigationismorepreciseandallowsyoutogounimpeded.
PathplanningProvidesthepathplanningofthedepartureanddestination,andsetsthefunctionofpassingandavoidingpoints.
VoicepromptsThevoicepromptsarekindandreal,andtheroadnameisautomaticallybroadcastedwhiledriving.
MusicappreciationEnjoyaudio-visualenjoymentandrelievefatigue.
Управление на файлове Мощни функции за управление на ресурси.
Принцип на позициониране
Навигационен принцип, базиран на оценка на следите (DRS)
Asearlyastheendofthe1970s,peoplebegantostudyon-boardpositioningandnavigationInthatera,thespecificlocationofthevehicleandhowtoreachthislocationweredeterminedbydeductionandcalculationofthetrajectoryandtheratioofthemap.Trackestimation(DRS)essentiallytreatsthedrivingofavehicleasatwo-dimensionalplanemotion.Accordingtoitsstartingpositionandtheinitialangle,thechangesinthelengthandtheangleofthevehiclearemeasuredatalltimes,andthenthemapisusedforratioTocalculateandestimatethelocationofthevehicle.However,thismethodisdifficulttoimplement,andtheaccuracyrateisnothigh,buttheresearchonDRShaslaidthefoundationforsubsequentscientificresearch.
NavigationprinciplesbasedontheГлобална система за позициониране(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.
Състав
Thecarnavigationsystemismainlycomposedofanavigationhostandanavigationdisplayterminal.Thebuilt-inGPSantennawillreceivedatafromatleast3ofthe24GPSsatellitesorbitingtheearthtodeterminethecurrentpositionofthecar.ThepositioncoordinatesdeterminedbythenavigationhostthroughGPSsatellitesignalsarematchedwiththeelectronicmapdata,andtheaccuratepositionofthecarintheelectronicmapcanbedetermined.
Onthisbasis,variousfunctionssuchasdrivingnavigation,routerecommendation,informationquery,andAV/TVplaybackwillberealized.Thedriveronlyneedstowatchthescreenonthedisplay,listentothevoiceprompts,andmanipulatetheremotecontrolinhishandtoachievetheabovefunctions,thusdrivingthecarfreely.
Автомобилната GPSнавигационна система се състои от две части:
OnepartiscomposedofGPSreceiveranddisplayequipmentinstalledonthecar;theotherpartiscomposedofcomputercontrolcenter,andthetwopartsarepositionedthroughpositioningSatellitecontact.
Thecomputercontrolcenterisauthorizedandestablishedbythemotorvehiclemanagementdepartment.Itisresponsibleforobservingthedynamicsandtrafficconditionsofthedesignatedmonitoredcarsinthejurisdictionatanytime.Therefore,theentirecarnavigationsystemhasatleasttwomajorfunctions:oneisCartrackmonitoringfunction,aslongasthecodedGPSreceiverisinstalledonthecar,thecarcanindicateitslocationthroughtheelectronicmapofthecomputercontrolcenternomatterwhereitisdriving;theotheristhedrivingguidefunction,theownercanStoretheelectronicmapsofthetrafficlinesineachareaonafloppydisk.Aslongasthefloppydiskisinsertedintothereceivingdeviceonthecar,thedisplaywillimmediatelyshowthelocationofthecar’sareaandthecurrenttrafficstatus,andyoucanenterthepurposeofgoing.Thebestdrivingrouteispre-programmed,andthecomputercontrolcentercanacceptinstructionstoselecttherouteanddirectionofthecar.
Системни елементи
Сателитни сигнали
CarsatellitenavigationsystemsneedtorelyontheГлобална система за позициониране(GPS)todeterminethelocationofthecar.Themostbasic,GPSneedstoknowthelongitudeandlatitudeofthecar.Insomespecialcases,GPSneedstoknowthealtitudetoaccuratelylocate.Withthesethreesetsofdata,theaccuracyofGPSpositioningcanoftenreach2to3meters.
BecauseGPSrequiresthecarnavigationsystemtoworkwithinthedirectlineofsightofthesynchronoussatellite,tunnels,bridges,orhigh-risebuildingswillblockthedirectlineofsight,makingthenavigationsystemunabletowork.Furthermore,thenavigationsystemusesthelawsoftriangleandgeometrytocalculatethepositionofthecar,sothecarmustbeunderthesightofthreesynchronoussatellitesatthesametimetodeterminetheposition.Themoresynchronoussatelliteswithinthedirectlineofsightofthenavigationsystem,themoreaccuratethepositioning.Ofcourse,mostofthesynchronoussatellitesareoverdenselypopulatedmetropolises,sowhenyouarefarawayfromurbanareas,theeffectofthenavigationsystemwillnotbetoogoodorevennotworkatall.
Обработка на сигнала
TheworkingprincipleoftheGPSsystemistoanalyzethesignalreceivedfromthesynchronoussatellite.Projectedonaverticalplane,thesesignalscanbevisuallyrepresentedasaninvertedfunnel.Whenthelowerhalfofthese"funnels"overlaptoacertainextent,theGPSparsingprogramcancalculatethecoordinatesofthecar'slocation.Intheprocessofdrivingacar,adevicesimilartoagyroscopeusedinairplaneorshipnavigationcancontinuouslyprovidethepositionofthecar.However,whenthesatellitesignalisinterrupted,thedataprovidedbythespeedometerisusedtofillthegapandrecordthetraveltime.
Картографски данни
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.
Файлова композиция на индекса на картата
Itisessentialtonavigatetheelectronicmapinthecarnavigationsystem,andrealizethemassivemapdataontheembeddeddeviceFastaccessstillhascertainlimitations,anditisalsoverytrickyindesign.Onlybycreatingafastandefficientspatialsearchsystemcanthisproblembecompletelysolved.Wehavetoselectamapinadvance,andafterefficientlycompletingthedeterminationofthemapstyle,duetotheformatofthemapdataofthenavigationsystem,anewestcalculationmethodisproposed,whichistheso-calledHilbert-Rtreeindexmethod.Afterthat,Ispecificallydescribedhowtocompletethisalgorithm,andusedpseudo-codetodemonstratetheestablishmentandoperationofthisalgorithm.
Осъществяване на работа с картографиране
Mapzoomisembodiedintwoaspects,oneofwhichisfixed-pointzoom,andtheotherisframezoom.Thiszoomcanbecompletedbychangingthepositionofthemouseandspecifyingthezoomfactorandtheinitialpositionofthegraphagain.Youcandrawatanytimeaccordingtoyourwishesandtime.Thisdrawingmethodcanbeachievedbyroaming.
Принципът на технологията за прожектиране на навигатора:
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.
Системна класификация
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.
Глобална система за позициониране
TheГлобална система за позициониране(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.
Основните характеристики на системата за глобално позициониране: (1) всякакви метеорологични условия; (2) глобално покритие; (3) триизмерно време с фиксирана скорост и висока точност; (4) бързо, спестяващо време и високоефективно: (5) широко използвана функция.
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.
Съществуват много видове GPS сателитни приемници. Според модела те се разделят на геодезични, тотални станции, синхронизационни, ръчни и интегрирани; космически и бомбени.
След повече от 20 години практика, GPS системата е многофункционална система за високопрецизна, всякаква метеорологична и глобална радионавигация, позициониране и синхронизиране. GPS технологията се е развила в международна високотехнологична индустрия с много полета, много режими, много цели и много модели.
Mapquery
◎Можете да търсите местоположението на вашата дестинация на работещия терминал.
◎Youcanrecordthelocationinformationoftheplacesyouoftengoto,andkeepit,andyoucansharethelocationinformationwithothers.
◎Информация за неясни заявки като бензиностанции, хотели, банкомати и т.н. близо до вашия прикачен файл или определено местоположение,
Планиране на маршрута
WhenyoudonotpressWhenyoudriveontheplannedrouteorgotothewrongintersection,theGPSnavigationsystemwillre-plananewroutetoyourdestinationbasedonyourcurrentlocation.
◎GPS навигационната система автоматично ще планира плановия маршрут според зададените от вас начална точка и дестинация.
◎Планирането на маршрута може да зададе дали да се премине през определени точки.
◎Theplanningroutecanbesetwhethertoavoidhigh-speedandotherfunctions.
Гласова навигация
Usevoicetoprovidedriverswithdrivinginformationsuchasintersectionsteering,navigationsystemstatus,etc.,justlikearoad-knowingguidetellsyouhowtodrivetoyourdestination.Oneofthemostimportantfunctionsinnavigationallowsyoutosafelyreachyourdestinationthroughvoicepromptswithoutwatchingtheoperatingterminal.
Екранна навигация
Ontheoperatingterminal,themapwillbedisplayed,aswellasthecurrentlocationofthecar,drivingspeed,distancetothedestination,plannedrouteprompts,anddrivinginformationpromptsforintersectiondirections..
Недостатъци
Карнавигацията често заблуждава собствениците на коли
TherearemanycarownerswhoaremisledbycarGPS.Forexample,someremoteareascan'tbefoundonthenavigationmap,orthecarownersaremisledby"changingthecrownandLiDai";sometimesthenavigationmap"seeksfartheraway"ontheroadthatcanbereachedthroughastreet,andtakesthecarownerforalongcircle.ThecurrentcarnavigationisbasedonGPStechnologyforpositioning,butGPScannotbe100%positioning.GPSisnotlikeamobilephonebroadcast,whichcanreceivesignalsanywhere.ManythingswillaffectGPSreception,includingthedistributionofskystars,buildings,viaducts,radiowaves,leaves,andthermalpaper.GPSpositioningisgreatlyaffectedbyexternalfactors.Generallyspeaking,theareaoftheskythatcanbeseenfromtheGPSpositionistheareawhereGPScanreceivesignals.
Подробности за пазаруване
Inthecurrentautomotiveelectronicproducts,carDVDnavigationaccountsforanincreasingproportion,andnearly40%ofnewcarownershavetheneedtoinstallcarDVDnavigation.Therefore,alargenumberofproducedandOEMDVDnavigationproductshaveemerged,andthedifferenceinproductqualityisbeyondyourimagination.
AssoonasmanyDVDproductsareinstalledinthecar,theywillscreamassoonastheystepontheaccelerator,andthesoundandimagesareverypoor.Therefore,39AutoPartsNetworkremindsconsumerswhenbuyingcarDVDnavigationproductsPayattentiontothefollowingthreedetails:
Качество на звука
DVDisusedtoplaymusic,sothesoundqualityisveryimportant.Therefore,beforebuyingaDVD,youmustaskclearlywhatisthe"V"ofthefrontoutputofthisDVDplayer,orcomparethesoundqualityofthisDVDplayerwithotherDVDplayers.IfthesoundqualityofaDVDplayercancomparewiththesoundqualityofaCDplayer,thepricewillofcoursenotbemuchcheaper.
Разпространение на изображения и DVD плейъри
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.
Как да използвам
Относно звездите за търсене
AllGPSindoorscannotreceivesatellitesorthesignalisveryweak,only
Carnavigation (11 снимки)
Thesignalcanonlybereceivedoutdoors.Thisiscommonsense.Thecorrectwaytosearchforthesignalis:1.Keepsearchingforsignalsanddon'tmovearound,becausewalkingaroundGPSisnoteasytolocate.
2.Turnonthemachinetothenavigationinterface,clickonthesignalsymbolintheupperrightcornerofthenavigationinterface,youcanseethenumbermapofsatellitesaccepted,normal3positioning,5navigation.
3.OpentheGPSreceivingsatellitesignalmoduleontheupperrightsideofthebackofthemachineata90-degreeangletothemachinetoreceivethesignalbest.
4.Speedofreceivingsignal:Twoconceptsareinvolved
(1)Themeaningofcoldstart:thefirstGPSsearchforsatellitesiscalledcoldstart,whichisusuallyslow.
DifferentGPSsearchspeedsaredifferent.SomeGPScoldstartsearchesforsatelliteswithin1minute,someare1minuteaway,about1minuteto2minutes,andsomeare2minutesaway.
(2) Значението на горещ старт: рестартиране в рамките на 2 часа бърз старт, горещ старт е най-бързият,
usuallythesatelliteissearchedin1-2seconds.2hoursto4hoursiswarmstart
Относно електронното куче
Currently,alltheelectronicdogfunctionsinGPSareequippedwiththisfunctioninthenavigationmap,thatis,theelectronicdogmapisequippedinthemachine."Anti-speedradarisanationalbannedproduct,anditisalsobannedonTaobao.》ThefunctionsoftheelectronicdoginGPSareasfollows:
1.TherearespeedmeasurementinformationpointsatintersectionsontheGPSmap,andtheGPSwillalertyoubyvoice.
2.Ifthereisnoinformationpointformeasuringspeedinthemap,itwillnotremindyou.Soyoucan'trelysolelyonGPStoreversespeedmeasurement.Thereisagoodwaytohelpyousolveit:youcansetthespeedyourselfintheGPS,andtheGPSwillvoiceremindyoutodriveatthespeedlimitifyouexceedthespeed.
Метод на поддръжка
1.Коригиране
Theaboveisfromthemaintenanceaspect.Inaddition,correctTheuseofisalsoveryimportant.Aftertheuseisover,thecarnavigationshouldbeturnedofffirst,andthenturnedoff.Neverturnoffthemachine,althoughitsavestrouble,butafteralongtimeitwilleasilydamagetheelectroniccomponents.
Inaddition,donotletthenavigationscreentouchsharpobjects.Atthesametime,trytoavoidexposureofthecenterconsoletothesun.Thelargetemperaturedifferencenotonlyaffectsthebatterylifeofnavigation,butalsoaffectsthetouchsensitivityoftheLCDscreen.
Второ, ежедневна поддръжка
Indailyuse,ifyoudonotpayattentiontotheoperation,itiseasytobringdusttothenavigation.Infact,itisconsideredinthedesignprocessnowTheproblemofdustpreventionhasbeenrelativelyreducedcomparedtobefore,andmorepeoplewillchoosetodirectlyusetheUSBinterfaceformusicplayback.Aslongaswepayattentiontocovertheprotectivecoverintimeduringnormaluse,itwilleffectivelyblocktheentryofdust.Thelaserheadoftheopticaldiscisafragilepartandmoreexpensive.Ifafailureoccurs,pleaseaskaprofessionaltodealwithit.Thebuttonsandknobsonthepanelcanbecleanedwithasmallcottonswaborthelike.
3. Водоустойчив и влагоустойчив
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.
Четири. Корекция
Tooperatecorrectly,otherwiseitwillaffecttheGPSservicelife.Thecorrectoperationmethodis:
1.Whenusing,youmustfirstturnoffthepageandthenturnoffthedevice,andyoucan’tturnoffthedevicedirectlywithoutclosingthepage.Thatisanillegaloperation.
2,themachineshouldbechargedforabout10hoursthreetimesbeforeuse,sothatthebatterystoragecapacitycanbefullyutilized.
3.Startthecarfirst,thenpluginthecigarettelighterpowersupply.Afterthenavigation,unplugthecigarettelighterandplugitinagainafterthecarisstartednexttime,whichwillhelpprotectthebatteryofthemachine.
Тенденция на развитие
Theneedsofsocialtechnologyhavepromotedtherapiddevelopmentandmaturityofcarnavigationsystemsinrecentyears.Manyforeignnavigationmanufacturershavecontinuouslydevelopedvehiclesthatmaketheworld’seyesshine.Thenavigationsystemnotonlyimprovestheaccuracyofpositioning,italsohasmoreandmorepowerfulfunctions.Thefollowingisanexcellentcarnavigationsystemabroad.
ThemainofficeofGARMINisinKansas,USA.ItisthemostmagnificentandmostprofessionalnavigationGPSmanufacturer.STPIII"Dowhateverittakes"isforit.Itsupportsvoiceoperationandcanbeusedinvehicles.Navigationequipmentcanintelligentlyselectroads,performvoicenavigationoperations,searchandfind,andcontainsworldmaps.Thereareevenrecordsofplaceswhereeachcountrycandriveortravelbyboat,whichcovers30routesAndmorethan2,000trackpoints.
Примери за навигационно оборудване
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.
Бъдеща тенденция на развитие
Informationterminalshavethreetypicalshortcomings:inabilitytoreflectinformationallthetime,insufficientinformationcontent,andtooindependentinformation.TheGPSnavigationsystemwillbecomeacomprehensiveserviceterminal,whichhasbothnavigation,leisureandentertainment,communicationandinformationdeliveryfunctions.ThemaindevelopmenttrendinthefutureistocleverlycombinevehicleGPSnavigationtechnologyandautomotiveelectronicstechnology.
Терминал за информация в реално време
VehicleGPStechnologycanreleasethelatestdynamictrafficconditions,driver’sdrivingconditions,watchmovies,recordreversingconditions,andInthecar,youcanmakephonecalls,usecomputersforofficework,andalsohavenetworkcoverage.Realizingreal-timeinformationterminalsisalsoindispensable.
Диверсификация на информационните терминали
CarGPSnavigationsystemcanalsopreventthecarfrombeingstolen,anditcanalsounderstandthelocationofthestolencarandwhetherithasbeentransferredtoanotherlocation,etc..Anditcanalsodevelopotherfunctions,suchasusingamobilephonetooperatethenavigationsystem,storesomeinformationorlearnaboutsurroundingnews.Itcanmeetpeople'sall-roundinformationneedsindailylifeandlearning.
Конвергенция на информационните терминали
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.