Domov technika Video surveillance system

Video surveillance system



Workingprinciple

Monitoringisthephysicalbasisforreal-timemonitoringofkeydepartmentsorimportantplacesinvariousindustries.Managementdepartmentscanuseittoobtaineffectivedata,imagesorsoundinformation,andpreventsuddenabnormalities.Theprocessoftheincidentismonitoredandmemorizedintimetoprovideefficientandtimelycommandandheight,deploypoliceforce,andhandlecases.Withtherapiddevelopmentandpromotionofcurrentcomputerapplications,apowerfulwaveofdigitizationhasbeensetoffallovertheworld,andthedigitizationofvariousequipmenthasbecometheprimarygoalofsecurityprotection.Theperformancecharacteristicsofdigitalmonitoringalarmare:real-timedisplayofmonitoringscreen,single-channeladjustmentfunctionofvideoimagequality,eachvideospeedcanbesetseparately,fastretrieval,multiplevideomodesettingfunctions,automaticbackup,pan/tilt/lenscontrolfunction,Networktransmission,etc.

Addatimegeneratortosuperimposethetimedisplayontheimage.Whenthelineislong,installanaudioandvideoamplifiertoensurethequalityofaudioandvideomonitoring.Scopeofapplication-internalandexternalenvironmentsofbanks,securitiesbusinesspremises,enterprises,institutions,governmentagencies,andcommercialpremises,buildingpassages,parkinglots,internalandexternalenvironmentsofhigh-endcommunities,libraries,hospitals,andparks.

Productinterfacemap

Thesysteminnovativelyrealizestheintegrationandlinkageofvideosurveillanceandconference,soastoachievethedualfunctionsofmonitoringandcommunication,andfullymeettheneedsoftransportation,waterconservancy,oilfields,banks,Remotemonitoringandemergencycommandrequirementsinvariousfieldssuchastelecommunications.

Scopeofapplication:suitableformonitoringofrealestate,buildings,factories,warehouses,logistics,chainstores,stores,andkindergartenparent-childonline

Typicalapplications

VideosurveillancesystemNetworking,taketrafficvideosurveillanceasanexample,asshowninthefigurebelow.

Theabovetrafficvideosurveillancecanbecarriedout:

  • Licenseplaterecognition

    Ifthevideosceneisaroadjunctionoracommunityentrance,aslongasthelicenseplateareaisAppearedinthevideo,thedevicecanautomaticallyrecognizethelicenseplatenumberandprompttheuserintext.Itcanbeusedfortheinspectionofillegalvehicles.Forexample,alicenseplatevehicleescapedafteranaccident.Ifthereareintelligentrecognitionvideoserversatallmajorcrossingsinthecity,thesystemcanonlysetoneorseverallicenseplatenumbersthatneedtobecheckedintothesystematatimethroughthenetwork.Ineachofthesmartdevices,oncethevehiclewiththislicenseplatehasappearedinthefieldofvision,itcanimmediatelyalertandsavealotofpoliceresources.

  • Vehiclespeedmeasurement

    Forexample,thedistanceconfirmationmarkingofhighway,alwaysremindthedrivernottospeed,butspeedingstillhappensfrequently.Imagineifyouinstallanintelligentvideoserveronthehighway,weonlyneedtodrawtwolinesinthefieldofview.Ifweknowthattheactualdistancebetweenthetwolinesis100M,inputitintothedevice,andthedevicecanautomaticallycalculateeachentry.Thespeedofthevehicle,andimmediatelycallthepolicewhenspeeding.

  • Retrogradewarning

    Forexample,one-wayroadsorexitsorentrancesofstationsandairports.Theflowoftrafficandpeopleareallone-way.Oncesomeonegoesretrograde,thesystemwillautomaticallyRecognizeandgenerateanalarm.

  • Trafficstatistics

Smartdevicescanidentifypassingpedestriansandvehicles,andcanalsocountpassingpeopleorThenumberofcars.Imagineinstallingsuchasmartdeviceatanintersectionortheentranceofaconventionandexhibitioncenter,andyoucancountthepasttrafficorpeopleflow.Itcanprovidemoreandmoretimelyinformationforbusdispatching.

Thebiggestfeature

Thesysteminnovativelyrealizestheintegrationandlinkageofvideosurveillanceandconference,andcanmanageremoteequipmentflexiblyandeffectively.Throughtherecording,playback,linkagealarm,monitoringstrategyformulation,emergencycommandandotherapplicationsofremotemonitoringobjects,thedualfunctionsofmonitoringandcommunicationareachieved.

Itsbiggestfeatureisthatitsupportsviewingvideoscreensfrommobileterminalssuchassmartphones/tablets,andsupportstransferringmonitoringscreensintovideoconferencestoachieveemergencycommandandremotedispatch.

Componentsofequipment

Videosurveillancesystemproductsincludeopticaltransceiver,opticalcableterminalbox,PTZ,PTZdecoder,videomatrix,harddiskvideorecorder,surveillancecamera,lens,bracket.Videosurveillancesystemcomponentsincludesurveillancefrontend,managementcenter,surveillancecenter,PCclientandwirelessbridge.Thedescriptionofeachcomponentisasfollows:

(1)Monitoringfrontend:Itisusedtocollectmonitoringinformationofthemonitoredpointandcanbeequippedwithalarmequipment.①Ordinarycamera+videoserver.Theordinarycameracanbeananalogcameraoradigitalcamera.Theoriginalvideosignalistransmittedtothevideoserver,andafterbeingencodedbythevideoserver,itistransmittedtootherdevicesthroughthenetworkusingtheTCP/IPprotocol.

②Webcamera.Thewebcameraisanadvancedcameradevicethatintegratescamera,videoencoding,andWebservices,withaTCP/IPprotocolstackembedded.Youcanconnectdirectlytothenetwork.

(2)ManagementCenter:Itisresponsibleforthemanagement,control,alarmprocessing,videorecording,videoplayback,andusermanagementofallfront-endequipment.Eachpartofthefunctionisperformedbyadedicatedserver.

(3)Monitoringcenter:usedtocentrallymonitortheareaunderitsjurisdiction,includingtheTVwallandmonitoringclientterminalgroups.Therecanbeoneormoremonitoringcentersinthesystem.

(4)PCclient:Inadditiontothemonitoringcenter,aPCcanalsobeconnectedtothenetworkforremotemonitoring.

(5)Wirelessnetworkbridge:ThewirelessnetworkbridgeisusedtoaccessthewirelessdatanetworkandaccesstheInternet.Throughthewirelessnetworkbridge,themonitoringinformationontheIPnetworkcanbetransmittedtothewirelessterminal,andthecontrolcommandofthewirelessterminalcanalsobetransmittedtothevideomonitoringmanagementsystemontheIPnetwork.ThecommonlyusedwirelessnetworkistheCDMAnetwork.

Featuresofwork

  • Digitalization

ThedigitizationofvideosurveillancefirstItshouldbethattheinformationflow(includingvideo,audio,control,etc.)inthesystemischangedfromanalogtodigital.Thiswillcompletelybreakthestructureof"classicclosed-circuittelevisionsystemiscenteredoncameraimagingtechnology"andfundamentallychangethevideosurveillancesystemfromWaysandstructuresofinformationcollection,dataprocessing,transmission,systemcontrol,etc.Thedigitizationofinformationflow,codingandcompression,andopenprotocolsenableseamlessconnectionbetweentheintelligentnetworkvideosurveillancesystemandthevarioussubsystemsinthesecuritysystem,andrealizemanagementandcontrolonaunifiedoperatingplatform.Thisisthesystemintegrationmeaning.

  • Networked

ThenetworkedvideosurveillancewillbeintegratedbythestructureofthissystemTransitiontoadistributedsystem.Thedistributedsystemadoptsamulti-layerhierarchicalstructure.Ithasamicro-kerneltechnologywithmulti-tasking,multi-user,anddistributedoperatingsystemtorealizetherapidresponseofthepreemptivetaskschedulingalgorithmtoformadistributedvideosurveillancesystem.Thehardwareandsoftwareofthesystemadoptstandardized,modularandsystematicdesign.Theconfigurationofvideosurveillancesystemequipmenthasstrongversatility,goodopenness,flexiblesystemconfiguration,completecontrolfunctions,convenientdataprocessing,friendlyman-machineinterfaceandsysteminstallation,Simpledebuggingandmaintenance,systemsafety,fault-tolerantandreliablefunctions.

  • Systemintegration

ThenetworkofvideosurveillancehasbrokentosomeextentThegeographicalandquantitativeboundariesofthedeploymentcontrolareaandequipmentexpansion.Systemnetworkingwillenablethesharingofhardwareandsoftwareresourcesoftheentirenetworksystem,aswellasthesharingoftasksandloads.Thisisanimportantconceptofsystemintegration.Closed-circuitmonitoringsystemcantimely,image,andtrulyreflectthescreenofthemonitoredandcontrolledobjectinoccasionswherepeoplecannotdirectlyobserve.Theclosed-circuitmonitoringsystemhasbecomethemosteffectiveobservationtoolforthemajorityofuserstomonitorinmodernmanagement.Inthecontrolcenter,aslongasoneworkeroperates,itispossibletoobservemultiplecontrolledareas,aswellasthemonitoringfunctionofremoteareas.

Mainfunctions

1.Localvideo,savelocalvideosurveillancevideodatawithinacertainperiodoftime,andcaneasilyqueryandcollectevidencetoprovideabasisforsubsequentinvestigations.

2.TheremotevideosurveillancemonitoringpersonnelcanremotelyarbitrarilyretrievethesurveillanceimagesstoredintheInternetcafes,andcanremotelyissuecontrolinstructions,intelligentretrievalofvideodata,playback,adjustmentofthecameralensfocallength,andcontrolofthePTZInspectionorlocaldetailedobservation.

3.AuthoritymanagementInordertoensuretheprivacyofInternetusersandthesecurityofvideodata,thesystemhasoperationauthoritymanagement,andsystemloginandoperationarestrictlycontrolledtoensurethesecurityofthesystem.

4.Theserverplatformstructureisconvenient.Theserversoftwarecanbeeasilyinstalledinthemunicipalpublicsecuritybureau,district(county)publicsecuritybureauandvariouspolicestations.YouonlyneedtoassignusersloginaccountswithdifferentpermissionstoviewInternetcafemonitoringinformationinthejurisdiction.

5.ThesystemcontainsthemanagementofthebasicinformationoftheInternetcafe,andtheelectronicmapiscombined.WhenanemergencyoccursintheInternetcafe,thebasicinformationoftheInternetcafecanbeobtainedintime(theInternetcafephonenumber,address,personincharge),AndcontacttherelevantpersoninchargeoftheInternetcafemorequickly.

6.ThecombinationofInternetcafemonitoringandelectronicmapallowsyoutoviewthegeographicallocationofInternetcafesmoreintuitivelythroughtheelectronicmap,anddisplaytheoperatingstatusoftheInternetcafemonitoringequipmentinrealtimeontheelectronicmap.WhenyouneedtoviewthemonitoringinformationofanInternetcafe,justdouble-clicktheInternetcafeontheelectronicmaptoenterthemonitoringinterfaceoftheInternetcafe.

7.WhentheInternetpersonnelpresenttheirIDcardattheservicecounteroftheInternetcafetoregisterfortheInternet,thesystemcanautomaticallytakeaphotooftheInternetuserandtransmitthecorrespondingInternetcardinformationoftheInternetusertotheserverofthemonitoringcenterofthepublicsecurityorganforstorage.

8.Surveillancerecordingfunctionanytime,anywhere,nomatterwhereyouare,anypasswordauthorizeduserconnectstothesurveillancenetworkthroughthecomputeraroundyou,youcanseethereal-timeimageofanysurveillancenetworkandrecordasneeded,Toavoidtheinconvenienceofsupervisionandmanagementcausedbygeographicalseparation.

9.Thesystemhasstrongscalability.Ifyouneedtoaddanewmonitoringnetwork,justaddthecorrespondingInternetcafeinformationandequipmentinformationontheserverside.

10.Highsecurity,imagemaskingtechnologytopreventillegaltamperingwithvideodata;onlyauthorizeduserscanbackupvideo,effectivelypreventingmaliciousdamage;powerfullogmanagementfunctionsensurethesafeuseofdedicatedsystems.Thedatatransmittedbetweentheserverandtheclientareallencrypted.

Specialfeatures

Multi-screenmonitoringeffect

Youcanchooseanydisplaymodeaccordingtoyourneeds,andcontrolthecamera'slensangleasneeded,Adjustthevideoandaudioeffectsofthedisplayscreen,whichgreatlyfacilitatesthecentralizedviewingofremotesurveillancevideobythemonitor

Specificvideowalldisplaymode

Throughsetting,keeptheuser'scomputerscreenoperationconsistentwiththeactualdisplayoftheTVwall;provideflexibleandconvenientdisplaymodessuchascyclecycles,andrealizetheidealviewingplanforcustomers.

FlexiblealarmlinkageMethod

Alarmtriggeringconditionscanbesetflexibly,andremotepromptsandlinkagefunctionsforevent-triggeredalarmsareprovided.Forexample,thealarminformationissenttootherusersinvariouswayssuchasscreenprompts,emails,alarmlinkage,anddesignatedrecording.

Variousrecordingstrategies

SystemProvidesthreerecordingstrategies:default,customandsmart;providesaseriesofmanagementfunctionssuchasregularuploadandbackupofvideodatafiles,retrievalandquery;inresponsetouserrequirementsforvideofilesondemand,authorizeduserscanwatchonlineordownloadandarchive.

Specialmotiondetectionfunction

Byanalyzingandcomparingthechangesofimagedata,wecandeterminethebehavioronthespot.Aseriesoflinkageoperationsofthemonitoringsystemarerealizedbyanalyzingtheimagechangesofthemonitoringsourcelocation

Theoriginalvideoconferencelinkage

ThesystemcanconnectanychannelorMulti-channelmonitoringscreensaretransferredtothevideoconferencesystemformulti-partydiscussion,soastoachievetheperfectintegrationofmonitoringandcommunication

Developmenthistory

Thevideomonitoringsystemconsistsofreal-timecontrolsystem,monitoringsystemandmanagementInformationsystemcomposition.Thereal-timecontrolsystemcompletesthefunctionsofreal-timedataacquisition,processing,storage,andfeedback;themonitoringsystemcompletesall-weathermonitoringofeachmonitoringpoint,andcanswitchmultipleimagesatmultipleoperationcontrolpoints;themanagementinformationsystemcompletesthecollectionofvariousrequiredinformation,Receiving,transmitting,processingandprocessingarethecontrolcoreofthewholesystem.

Thevideosurveillancesystemisanintegralpartofthesecurityprotectionsystem.Itisacomprehensivesystemwithstrongprotectioncapabilities.Videosurveillanceiswidelyusedinmanyoccasionsduetoitsintuitiveness,convenienceandrichinformationcontent.

Thevideosurveillancesystemhasbeendevelopedinjustovertwodecades,fromanalogsurveillanceinthe19thgenerationand1980stofierydigitalsurveillanceandthentotheascendantnetworkvideosurveillance,whichhasundergoneearth-shakingchanges.AsIPtechnologygraduallyunifiestheworldtoday,itisnecessaryforustore-understandthehistoryofthedevelopmentofvideosurveillancesystems.Fromatechnicalpointofview,thedevelopmentofvideosurveillancesystemsisdividedintothefirst-generationanalogvideosurveillancesystem(CCTV),tothesecond-generationdigitalvideosurveillancesystem(DVR)basedon"PC+MultimediaCard",tothethird-generationbasedentirelyonIPnetworkvideosurveillanceSystem(IPVS).

Thefirstgeneration

Thefirstgenerationofvideosurveillanceisatraditionalanalogclosed-circuitvideosurveillancesystem(CCTV)

Itreliesoncameras,cables,videorecordersandmonitors,etc.Professionalsetting.Forexample,thecameraoutputsavideosignalthroughadedicatedcoaxialcable.Thecableisconnectedtodedicatedanalogvideoequipment,suchasvideoscreensplitter,matrix,switcher,videocassetterecorder(VCR)andvideomonitor,etc.AnalogCCTVhasalotoflimitations:

Thelimitedmonitoringcapabilityonlysupportslocalmonitoring,whichislimitedbythetransmissionlengthoftheanalogvideocableandthecableamplifier.

Limitedscalabilitysystemsareusuallylimitedbytheinputcapacityofvideoscreensplitters,matrices,andswitchers.

Userswithheavyvideoloadmusttakeoutthevideotapefromthevideorecorderorreplaceitwithanewvideotapetosave,andthevideotapeiseasytobelost,stolenorinadvertentlyerased.

Poorvideoqualityisthemainlimitingfactor.Thevideoqualitydecreasesasthenumberofcopiesincreases.

Thesecondgeneration

Thesecondgenerationofvideosurveillanceisthecurrent"analog-digital"surveillancesystem(DVR):

The"analog-digital"surveillancesystemisWiththedigitalharddiskvideorecorderDVRasthecoresemi-analog-semi-digitalsolution,thecoaxialcableisstillusedtooutputvideosignalsfromthecameratotheDVR.TheDVRsupportsbothrecordingandplayback,andcansupportlimitedIPnetworkaccess.SinceDVRproductsarediverseandthereisnostandard,thisgenerationsystemisanon-standardclosedsystem.TheDVRsystemstillhasalotoflimitations:

Thecomplexwiring"analog-digital"solutionstillneedstoinstallaseparatevideocableoneachcamera,resultinginwiringcomplexity.

ThetypicallimitationofalimitedscalabilityDVRisthatamaximumof16camerascanbeextendedatatime.

LimitedmanageabilityYouneedexternalserversandmanagementsoftwaretocontrolmultipleDVRsormonitoringpoints.

Limitedremotemonitoring/controlcapabilitiesYoucannotaccessanycamerafromanyclient.YoucanonlyaccessthecameraindirectlythroughtheDVR.

ComparedwithRAIDredundancyandtape,the"analog-digital"programvideorecordinghasnoprotectionandiseasytolose.

Thethirdgeneration

ThethirdgenerationofvideosurveillanceisthefuturecompleteIPvideosurveillancesystemIPVS:

Comparedwiththeprevioustwosolutions,thefullIPvideosurveillancesystemThereisasignificantdifference.Theadvantageofthissystemisthatthecamerahasabuilt-inwebserveranddirectlyprovidesanEthernetport.ThesecamerasgenerateJPEGorMPEG4,H.264datafiles,whichcanbeaccessed,monitored,recordedandprintedbyanyauthorizedclientfromanylocationonthenetwork,insteadofgeneratingimagesintheformofcontinuousanalogvideosignals.Thegreatadvantagesoftheall-IPvideosurveillancesystemare:

Simplicity-allcamerasaresimplyconnectedtothenetworkthroughcost-effectivewiredorwirelessEthernet,allowingyoutousetheexistingLANinfrastructure.YoucanuseCategory5networkcableorwirelessnetworktotransmitcameraoutputimagesandhorizontal,vertical,andzoom(PTZ)controlcommands(evendirectlyviaEthernet).

Powerfulcentralcontrol-anindustrystandardserverandasetofcontrolmanagementapplicationsoftwarecanruntheentiremonitoringsystem.

Easytoupgradeandcomprehensivescalability-easilyaddmorecameras.Centralserverscanbeeasilyupgradedtofasterprocessors,largercapacitydiskdrives,andgreaterbandwidthinthefuture.

Comprehensiveremotemonitoring-anyauthorizedclientcandirectlyaccessanycamera.Youcanalsoaccessthesurveillanceimagesthroughthecentralserver.

Ruggedredundantstorage-SCSI,RAIDandtapebackupstoragetechnologycanbeusedatthesametimetopermanentlyprotectthesurveillanceimagefromharddiskdrivefailure.

Prospectanalysis

Withtherapiddevelopmentofthenationaleconomyandtherapiddevelopmentofinformationtechnologyandnetworktechnology,theapplicationofmonitoringsystemsinvariousindustriesisbecomingmoreandmoreextensive.Themonitoringsystemisnolongerjustincommunication.,Transportation,securityandotherindustryapplications.Itisgraduallydevelopinginthedirectionofotherindustriesandthepublic.Withtherapiddevelopmentofcomputer,network,imageprocessingandtransmissiontechnology,videosurveillancesystemtechnologyhasalsomadegreatprogress.Thesituationofsocialsecurityisbecomingmoreandmorecomplex,publicsecurityissuesarebecomingincreasinglyprominent,urbancrimesareprominent,andmethodsareconstantlybeingupdatedandupgraded.Theseareallurgentrequirementstoacceleratethedevelopmentofavideosurveillancesystemthatfocusesonactiveprevention.Sincethe"September11Incident"intheUnitedStatesandtheLondonUndergroundbombing,theurbanemergencypreparednesssystemforemergencieshasbecomeanewhotspotforsecurityconstruction.

China'svideosurveillanceindustryhasgonethroughthreestages,namely,analogvideosurveillance,digitalvideosurveillance,andnetworkvideosurveillance.China'svideosurveillancemarketistransitioningfromanalogtodigital,anddigitalvideosurveillancehasbecomethemainstreamofthemarket.From2004to2012,theproportionofdigitalsurveillanceintheoverallvideosurveillancemarkethasincreasedfrom35.7%to56.7%.Atthesametime,thenetworkvideosurveillancemarketisgrowingsteadily,withitsshareincreasingfrom7.4%in2004to28.2%in2012.

InSeptember2005,theMinistryofPublicSecurityofChinaofficiallylaunchedtheconstructionoftheurbannetworkedalarmandmonitoringsystem,andcarriedouttheconstructionofthealarmandmonitoringsystemattheprovincial,cityandcountylevelsacrossthecountrytopromote"safecities"Thepaceofconstruction.MajorcitiessuchasBeijing,Guangzhou,Shenzhen,Hangzhouandothercitieshavebeguntoacceleratetheconstructionofurbanvideosurveillancesystems.Drivenbytheconstructionanddevelopmentofvariousprojectssuchassafecityconstruction,transportationinformationconstruction,financialmonitoring,safeproduction,andsmarthome,thedemandforvideosurveillanceproductsinChinacontinuestoexpand.In2011,theoverallmarketsizeofChina'svideosurveillanceindustryreached23.04billionyuan,ayear-on-yearincreaseof19.71%.Itisexpectedthattheaveragegrowthrateof21.52%willbemaintainedfrom2012to2015.

Functionalrequirements

Currently,forthemonitoringsystem,theuser'srequirementsforitsfunctionshavebeendiversifiedandsystematized.Mainlymanifestedinthefollowingrequirements:

  1. Remoteaccess.Traditionalvideosurveillanceisgenerallycarriedoutinasmallarea,andusersgenerallyrequirethattheaccesslocationisnotrestrictedbyregion,andcanvisitthemonitoredlocationanytimeandanywhere.

  2. Multiplepeoplevisitthesamemonitoringpointatthesametime.Traditionally,amonitoringpointisgenerallyaccessedbyamonitoringcenter(user).Thesamemonitoringpointislikelytobeaccessedbymultipleusersatthesametime,andtheremaybenorelationshipbetweentheseusers.Thecomplexityofuseraccesswillrequirethesystemtostrengthenthemanagementofaccessrights.

  3. Monitoringpointstendtobescattered,whilemonitoringtendstobecentralized.Monitoringpointsbelongingtothesameuserarebecomingmoreandmorescattered,regardlessofgeographiclimitation.Forthesescatteredmonitoringpoints,centralizedmanagementandcontrolarerequired.

  4. Themonitoringsystemisrequiredtobeopenandexpandable.Thesamesystemshouldsupportmultipledifferenttypesofmonitoringequipment,andthenumberofusersandthenumberofmonitoredpointscanbeeasilyincreasedordecreased.

  5. Massivedatastorage.Networkingenablesthetraditionallocalvideorecordingfunctiontobetransferredtoaremoteserverforrealization,makingitpossibletostoremassiveamountsofdata.Atthesametime,thesystemisalsorequiredtohavestrongerstorage,retrieval,andbackupfunctions.

  6. Informationsecurity.Thecomplexityofthesystem,thediversificationofusers,andthebusinesscharacteristicsofvideosurveillancemustinevitablyrequirethesystemtoprovideastrongguaranteeforinformationsecurity.

  7. Smartvideosurveillance.Thefuturevideosurveillancesystemwillnotonlybelimitedtopassivelyprovidevideoimages,butalsorequirethesystemitselftobesmartenoughtorecognizedifferentobjects,findabnormalitiesinthesurveillanceimages,andsendoutalarmsandalarmsinthefastestandbestway.Provideusefulinformationtomoreeffectivelyassistsecuritypersonnelindealingwithcrises,andminimizefalsepositivesandunder-reports,andbecomeapowerfulauxiliarytoolforrespondingtoattacksandhandlingemergencies.Intelligentvideosurveillancecanalsobeappliedtoavarietyofnon-safety-relatedscenariossuchastrafficmanagement,customerbehavioranalysis,andcustomerservicetoimprovethereturnoninvestmentofusers.

Technicalobstacles

Thelarge-scalenetworkvideosurveillancesystembusinessisstillintheinitialstageofexploration.Networking,digitization,andintelligenceareinevitableforvideosurveillancetrend.Inthefaceofthisgeneraltrend,videosurveillancehasmanydeficienciesinsomekeytechnologies,mainlyinthefollowingaspects.

  • Mediadistribution

Videosurveillancesystemsgenerallydealwiththedistributionofvideomedia.Simple.Generally,usersdirectlyaccessnetworkcamerasorperformsimplemediaforwardingprocessingthroughvideoservers.Inthefaceofanincreasinglylargeuserbase,thismediatransmissionmethodwillbecomeabottleneckinimagetransmission.Whetherthereisanefficientmediadistributionmechanismwillbecomeanimportantindicatorforjudgingtheprosandconsofavideosurveillancesystem.

Infact,mediadistributionisaproblemthatanyvideoservicewillfaceafterithasdevelopedtoacertainscale.Videosurveillancecanworkwithothervideoservices,suchasIPTV,tostudyvideodistribution.Thefuturevideosurveillancesystemwillbebasedonarelativelycompletemediadistributionplatformtotransmitreal-timevideoinformationandrecordedvideoinformation.

  • Videostorage

Network-basedvideosurveillancesystemsbasicallyuseacentralvideoservertoStorethevideo.Thecentralvideoserveriseasytomanage,safeandreliable,butbecausethevideoisperformedatanytime,thedataflowislarge,whichbringsgreatpressureonthebearernetwork.Ifthevideostorageismarginalized,althoughthenumberofvideostreamscanbereducedandthepressureonthebearernetworkcanbereduced,thescatteredvideodatawillbringgreattroubletothemanagementofthevideo,andthesecurityofthevideodatawillalsobegreatlyreduced.Itcanbeseenthatinthefuture,thelocationwherealargeamountofstoragedemandoccurscannotbebornebythecentralunifiedstorage,butthereisnotechnicalsolutionavailableforalargeamountofdistributedanddifferentiatedstorage.Thefuturevideosurveillancesystemmustcarryoutareasonablestructuredesigninvideostoragetomeettheactualvideorecordingrequirements.

  • Concurrentscheduling

UsersofvideosurveillancesystemgenerallydonotThereisaconcurrentrequirement.Evenifabatchofusersmayrequiresimultaneouscallstotheinformationofthesamevideosurveillancepoint,thereisnodifferenceinsuchcalls.Inthefuture,theusersourcesofsystemservicesarediversifiedanduncontrollable,andtheirusepurposesarethesame.Themonitoringsystemhasconcurrentconflictcallstothesamemonitoringpoint.Therefore,priorityrightsandallocationmechanismsmustbeconsidered.

  • Billing

Thebillingmodelofvideosurveillanceisverysingle,usuallybasedonrental,Oryouonlyneedtoconsiderthetimeorflowofuploadinginformationfromasinglevideomonitoringpointusedaftertheuseraccesses.Theservicechargingpointandchargingscaledonotneedtobetoocomplicated.Generally,simpleRADIUSprotocolcanbeconsidered.Thebillingissuesconsideredinthefuturevideosurveillancesystemincludetheuseofsingle-usertosingleresource,theuseofsingle-usertomulti-resource,theuseofmulti-usertomulti-resource,whichisasinglebillingpointandbillingstandard,andonlyrelyingonconcisebills.Cannotbesupportedbythebillingprotocol.Thefuturesystemshouldsupportmulti-servicestrategiesthatcanbeflexiblychangedandimplementedinbatchesatthesametime,andsupportthereal-timechargingfunctionoftheabove-mentionedvariousbusinessstrategies.

  • Classification

Someremotevideosurveillancesystemscansupportclassification,butthisclassificationonlyRegardingtheclassificationofcontentdistribution,othersub-functionsystemsinthenetworkarestillconsideredasafirstlevel.

Theclassificationthatthefuturevideosurveillancesystemneedstoconsiderisnotonlytheclassificationofcontentdistribution,becausetheserviceprovidersindifferentregionsoftheentirenetworkhavefouraspects:usercontrol,businessmanagement,contentdistribution,andoperationsupport.Therearedifferencesintherequirementsforlevels.Inthisregard,therequirementsforusercontrolandbusinessmanagementareclosertothevideoconferencingsystemthanasimplepoint-to-pointconversationsystem,andallneedtoberedesigned.

  • Businessintegration

Remotemonitoringdoesnotconsidermutualcallswithotherbusinesssystems.Thefuturevideosurveillancesystemwillbecross-callingwithmultipleotherbusinesssystems.Multi-layerintercommunicationandresourcesharingbetweendifferentsystemsareissuesthatmustbeconsidered.

Installationprocess

Principles

Withtheenhancementofsecurityawareness,videosurveillancesystemsareslowlyenteringthehomesofordinarypeople.Videosurveillancesolutionsarealsoemerginginendlessly,sowhatprinciplesneedtobefollowedwheninstallingasurveillancesystem?Thefollowing8surveillanceinstallationprinciplesmustbeconsideredfirstwheninstallingasurveillancesystem:

1,thereal-timenatureofthesurveillancesystem,thispointespeciallyimportant.Itispreciselybecauseofthereal-timenatureofthemonitoringsystemthatthemonitoringsystemissonecessary.

2.Security,themonitoringsystemhassafetyprecautionsandconfidentialitymeasurestopreventillegalintrusionintothesystemandillegaloperations.

3.Scalability

Themonitoringsystemequipmentadoptsamodularstructure.Thesystemcaneasilyandflexiblychangethehardwareandsoftwarewhenthemonitoringscale,monitoringobject,ormonitoringrequirementsarechanged.Itisnotnecessarytochangethestructureofthenetworkandthemainsoftwareandhardwareequipment.

4.Openness

Themonitoringsystemfollowstheprincipleofopenness,andthesystemprovidesinterfacesforsoftware,hardware,communications,networks,operatingsystems,anddatabasemanagementsystemsthatcomplywithinternationalstandards.Andtools,sothatthesystemhasgoodflexibility,compatibility,scalabilityandportability.Theentirenetworkisanopensystem,compatiblewiththeproductsofmanymonitoringmanufacturers,andcansupportsecondarydevelopment.

5.Standardization

Theequipmentandtechnologyusedinthemonitoringsystemcomplywithinternationalgeneralstandards.Thiscangiveyouapeaceofmind.

6.Flexibility

Themonitoringsystemhasflexiblenetworkingmethodsandflexiblesystemfunctionconfiguration,whichcanmakefulluseoftheexistingvideomonitoringsubsystemnetworkresources.Thesystemintegratesothersubsystemsintoit,whichcanmeetthebusinessneedsofdifferentmonitoringunits,withcomprehensivesoftwarefunctionsandeasyconfiguration.

7.Advancement

Themonitoringsystemisasadvancedaspossibleonthepremiseofsatisfyingreliabilityandpracticability.Theentiresystemremainsadvancedfortenyearsafteritscompletion,andtheequipmentandtechnologyusedinthesystemcanadapttofuturedevelopmentandcanbeeasilyupgraded.Itwillbecomeanadvancedsecuritysystemthatadaptstofuturedevelopment,hashighreliability,goodconfidentiality,easynetworkexpansion,strongconnectiondataprocessingcapabilities,andeasysystemoperationandoperation.

8.Practicability

Thevideosurveillancesystemhastheabilityandleveltocompletetherequiredfunctionsintheproject.Thesystemconformstotherequirementsofrelevantdomesticandforeignregulationsthatareactuallyrequiredbythisproject,andiseasytoimplementandeasytooperate.Fromtheuser'spointofview,makefulluseofexistingresources,minimizesystemcosts,andenablethesystemtohaveahighercost-performanceratio.

Solution

Interferenceproblemsarecommonproblemsencounteredbysecuritymonitoringsystems.Suchas:snowflakeinterference,webinterference,diagonalinterference,horizontalinterference,upanddownscrollinginterference,distortionanddeformationinterference,andupanddownjitterinterference,etc.,mayinterferewiththenormaloperationofthevideosurveillancesystem.Thespecificsolutiondependsonthespecificsituation.

First,findthesourceofinterference

Wecanfindthesourceofinterferenceinasimpleway.Thethreemajorsourcesofinterferenceare:front-end-interferencefromthecamerasystem;mid-end-interferencefromcoaxialcabletransmission;andback-end-interferencefromequipment.

2.Videointerferencecheckmethod

Useamonitoronthefrontendtoconnectwiththecameratoseeifthereisinterferenceintheimage.Ifthereisinterference,solveitfromthecameraitself(suchasreplacingtheMillionhigh-definitiondigitalnetworkdomecamera),ifthereisnointerference,proceedtothenextstepofinspection.

Disconnectthecoaxialcabletransmissionlinefromthevideodistributororharddiskvideorecorderinthemonitoringroom,connectthemonitorseparatelytoseeifthereisinterferenceintheimage,ifthereisinterference,useananti-interferencedevice.Thiskindofinterferenceiscalled"environmentalelectromagneticinterference",andthiskindofinterferenceismorecommon.Ifthereisnointerference,itmeansthatthecoaxialcabletransmissionlineisnotinterfered.However,interferenceoccursassoonasitisconnectedtotheharddiskvideorecorder,indicatingthatthegroundpotentialdifferencebetweenthesystemequipmentcausesinterference.Itcanbesolvedbyaddingaphotoelectricisolatorbetweenthevideocableandtheharddiskvideorecorder.

Three.Videointerferencesolutions

Front-endinterferencesolutions:Thefront-end-camerasystemintroducesinterferencefromequipmentandshouldberesolvedfromtheequipmentitself(suchascameraquality,voltagestability)Performance,insulation),theinterferenceproblemcannotbecompletelysolvedwithananti-interferencedevice.

Mid-endinterferencesolutionidea:Mid-end-coaxialcabletransmissionisthemostcommoninterference,whichbelongsto"environmentalelectromagneticinterference".Electromagneticinterferencereferstotheinterferenceofthesurroundingenvironmentofthevideocable,includingthefrequencyconversionmotorinterference;electromagneticRadiationinterference;interferencefromhigh-frequencyandlow-frequencyequipment;interferencefromTVtowersandsubstations;strongpulseinterferencecausedbyhigh-powerelectricalappliancessuchasmotors,etc.,canbesolvedwithvideoanti-jammingdevices,suchasK1000.

Back-endinterferencesolution:Theback-end-deviceinterferenceismostlycausedbythegroundpotentialdifferencebetweenthedevices,resultingindiagonallinesandhorizontalbarsscrollingupanddown(rollingbars),whichcanbesolvedbyphotoelectricisolators,Suchassingle-channelphotoelectricisolationanti-jammerK2000,multi-channelphotoelectricisolationdistributorF1600G.

Four.PowerInterference

Videointerferencecausedbyinferiorpowersuppliesismorecommoninfront-endinterference.Inthepast,somecameramanufacturerschoselinearpowersuppliesoutofcautiousconsiderations.However,linearpowersupplieshavedisadvantagessuchaslowconversionefficiency,largevolume,highheatgeneration,andhighmanufacturingcost.Nowadays,thestabilityoftheswitchingpowersupplyhasbeenimprovedalot,andtheswitchingpowersupplywithexcellentproductionandsufficientmaterialshasbecomethemainstreamofcamerapowersupply.Itisrecommendedthatwhenpurchasingasecuritymonitoringpowersupplyforsurveillancecameras,trytotestthepowersupplytocheckitsstability,ripplesizeandotherqualityindicators.

Fifth,themostsuitableinstallationlocationofthevideosurveillancesystem

Professionalcompanythatprovidesdescriptionandconstructionofintelligentsecuritysystemprojectsforcampuses,companies,factories,andindustrialareas,andthesiteselectionoftheprojectLocation:

a.Factoryarea,campusentrance

b.Factoryareaclosed-circuitmonitoring

c.Perimeterwallclosed-circuitmonitoring

d.Closed-circuitmonitoringofproductionworkshop

e.Closed-circuitmonitoringofwarehouse

f.Closed-circuitmonitoringofofficebuildingfinanceroom

g.Closed-circuitmonitoringofdormitoryanti-theft

Anti-theftalarmsystem,accesscontrolandattendancesystem,patrolandmanageinductionwiring

Tento článek je ze sítě, nereprezentuje pozici této stanice. Uveďte prosím původ dotisku
HORNÍ