Даљински надзор

Твофиелдс

Thetermremotemonitoringhastwomeanings.Boththecomputerfieldandthevideosurveillancefieldhavethetermremotemonitoring,butthemeaningiscompletelydifferent.

Цомпутерфиелд

Remotemonitoringcanbeliterallydividedinto"monitoring"and"control".Amongthem,"monitoring"isremotemonitoring,whichcanbedividedintotwoparts.:Oneisthemonitoringoftheenvironment,andtheotheristhemonitoringofcomputersystemsandnetworkequipment.Inanycase,remotemonitoringreferstotheacquisitionofinformationthroughthenetwork;and"control"referstoremotecontrol,whichreferstotheremotecomputerthroughthenetworkThemethodofoperationincludesnotonlyrestartingandshuttingdowntheremotecomputer,butalsodailysettingoftheremotecomputer.Thefunctionofremotebootcanalsoberealizedthroughthecooperationofhardware.Allinall,ifyouwanttofullycontrolaremotecomputer,youshouldfirstbeabletomonitorit,thatis,youcanseethecomputer'sscreendisplay,andthenyoucantalkabout"control".Theremotecontrolmustbe"monitored"and"control".Combination,sowhatweusuallycallremotemonitoringgenerallyreferstothiskindofremotecontrol.Inaddition,fornetworkadministrators,remotecontrolalsoincludesthecontrolofnetworkdevices.Nowadays,mostnetworkdevicessupportTelnetandevenmanagethemremotelyviaWeb.Thisisalsoaremotecontrolmethod.

Видеосурвеилланцефиелд

RemotesurveillanceinthefieldofvideosurveillancereferstotheconnectionofvideosurveillanceequipmenttotheInternettoenableviewingofremotevideoimagesthroughterminaldevicessuchascomputersormobilephones.Therearemanywaystoaccess,suchasportmapping,accessthroughipaddress;viewingthroughdomainnameresolution.

Принцип рада

Forthefieldofvideosurveillance,thegeneralworkingprincipleisasfollows.

First,thevideosignalfromeachcameraisinputtothevideocaptureterminal,andthenthevideocaptureterminalusesanimagecompressionalgorithmtoconvertthevideosignalintoa25frame/seconddigitalimage,andthecompressedTheaudioandvideodatastreamisforwardedtothevideomonitoringcenterthroughthenetwork;finally,themonitoringcomputerofthevideomonitoringcenterdecompressesthereceivedimageandsounddatafromthefrontendandperformsreal-timemonitoringthroughthecomputerdisplayscreenandsoundcard.

Whenanalarmoccurs,thealarmdecoderwilllinkthealarmoutputdevice,andinputthealarmsignalintothevideoterminalthroughthealarmdecoder,andtransmitittothemonitoringcenter.ThevideoserverofthemonitoringcenterimmediatelyreceivesthealarmsignalSendoutsoundsignals,recordalarmevents,andperformalarmoperationssuchasharddiskvideorecording.

Controlsignalssuchascameracontrolandarmingaretransmitteddownstream.Themonitoringcentermonitorhostsendsoutvariouscontrolsignals.Afterreceivingthecontrolsignals,thevideocaptureterminalcontrolsthecamerathroughthepan-tiltlenscontrollerordirectly.Orcompletethearmingoperation.

Thesystemadoptshardwarecompressionandsoftwaredecompressiontechnology,andthecorrespondingsoftwareisaddedtothecomputerterminaloftherelevantdepartmentortheWebfunctionoftheIEbrowserthatcomeswithWindowscanrealizetheremotevideomonitoringfunction,andsetitasvideomonitoring.workstation.

NetworkcommunicationadoptsTCP/IPandnetworkmulticast(Multicast)technologytomaximizetheuseofnetworktransmissionperformanceandnetworkbandwidth,andavoidnetworkcongestion.

Theremotevideomonitoringsystemiscomposedofsystemsub-stationsanddispatchingcentermasterstation.Thesystemsub-stationsaresetupinsubordinatecoalmines,powerplants,andsubstationsthatneedtobemonitored.Theyaremainlycomposedofvideocollectionterminals,computernetworkconnectionequipment,cameras,alarmprobes,alarmdecoders,etc.,andareresponsibleforthecollectionofaudioandvideosignalsandalarmsignals.Anddigitization,andusetheexistingcomputernetworktorealizethevideo/alarminformationtransmissionandremotemonitoringbetweenthesitesandthedispatchcenter.Themainstationofthemonitoringanddispatchingcenterismainlycomposedofvideomanagementserver,browser,computernetworkconnectionequipment,remotemonitoringandvideoserversoftware.Themonitoringcentercanmanagemultiplecollectionstationsthroughthenetwork,andcanswitchandcontroltoanymonitoringpointsitetoimplementoverallmonitoring,therebyrealizingvideomonitoringoftheentirearea.Throughthenetwork,itcannotonlybrowsethelivevideoofeachmonitoringpointinrealtime,butalsoremotelyaccessthevideofilesofthecollectionstation,downloadthevideofiles,andcanalsorecordinthemonitoringcenter.

Remotevideosurveillancesystemsgenerallycanadapttodifferentcommunicationnetworks,whichcanbeEthernet,E1,wirelessLANorothertransmissionchannels.

Подстаница сабирни терминал

Thevideocollectionterminalprovidesvideoandaudioinput/outputinterfaces,whicharerespectivelyconnectedtothecameravideooutputormulti-screenprocessor,pickupsandspeakers;generallyprovideseveralTheinterfaceisconnectedwiththemonitoringterminalandserver;itmainlyrealizesthecollectionandcompressionofvideoandaudiosignals,andsendsthecompresseddatatothemonitoringcenterthroughthenetwork.

Цоллецтионтерминалцомпоситион

1.Видеоцаптуретерминал

2.СцреенСплиттер

3.Интегратедцамераоротхервариоусцамерас

4.Вариоусалармсенсорсандлармекуипмент

5.Алармдекодер

6.ПТЗандПТЗдецодер

Цоллецтионтерминалфунцтион

1.Прибављање слике, снимање и даљински пренос;

2.Collectvariousalarmsignals,realizealarmlinkageandtransmitthemtothemonitoringcenterofthecentralizedcontrolstation;

3.ЦонтролтхемовементофПТЗандленс;

4.Цонтролтхематриксвитцхертосвитцхвидеоимагес;

5.Receiveremotecontrolcommandstocontrolpan-tiltrotation,lensmovementandalarmdeviceoutput

МониторингЦентер

Themonitoringcenterconsistsofacentralimageprocessingserver,imagemonitoringterminal,imageprocessingsoftware,andremoteVideomonitoring/networkingalarmsoftwareisusedtoreceiveimagesandalarmsignalstransmittedfromthescene,promptingsecuritypersonneltotakevariousmeasures,andcanrealizeremotecontrolofmatrix,camera,PTZandremotelinkagecontrol,andremoterecordingisalsopossibleFiledownload,imageretrievalanddigitalvideoplaybackandotheroperations.

Thecentralimagemanagementserverisusedtomanagethetransmissionandstorageofimages.Themanagementserverisequippedwithsystemmanagementdatabase,systemmanagementsoftwareandmonitoringterminalmodules,whichplayaroleinthemanagementandserviceoftheentiresystem..

Функција надгледања

1.Receivevideodigitaldatafromthecollectionstation,replayandforwarditinrealtime;

2.Цанреализеремотецонтрол;

3.Receivethealarmsignalfromeachcollectionstationandsendittothemanagementserver;

4.Configureandstoretheconfigurationinformationofeachcollectionworkstation,andmanagesystemusersanduserpermissions;

5.Тхецонсолецаниссуецонтролцоммандтоаницоллецтионстатион,такоспан-тилтмовемент,имагесвитцхинг,итд.;

6.Providehistoricalvideoqueryandplaybackfortheconsolecomputerordispatchcenterclients;

7.Прикажи слику било које камере на зиду екрана и преклопнику;

8.ПровидеВЕБвидеостреамингсервицесфорнетворкусерс;

9.Realizethevideoconferencingfunctionwithafunctionalcomputerinthesystem

Theanti-interferencedesignofthecablewiringisbasedonthesystem’sspecialrequirementsforcableflameretardancyandfireprotection.Generally,allflameretardantshieldedcablesmustbeselected,andtheycanbeusedforhigh-voltageelectromagneticfields.Playagoodshieldingrole.Inaddition,theoutdoorburiedcablesarecoveredwithhot-dipgalvanizedpipes,theordinarycablesinthecabletrencharecoveredwithPVCpipes,andtheindoorcablesarecoveredwithPVCgrooves,sothatthesystemcancompletelyeliminatesomeinterferencessuchashighelectricfieldsandhighmagneticfieldsinahigh-voltageenvironment.Theimpactoffactorsonthesystem.

Састав и функција

Thesystemgenerallyconsistsofthreeparts:front-endequipment,imageprocessingandtransmissionequipment,andnetworkclient.

Предња опрема се састоји од камера, пан-тилтс, декодера, заштитних поклопаца, носача, детектора аларма, пријемника, итд., одговорних за прикупљање видео сигнала, аудио сигнала и алармних сигнала;

Theimageprocessingandtransmissionequipmentinthesystemisanetworkvideoserver,whichisresponsiblefortransmittingaudio,videosignalsandalarmsignalstoaremoteclientthroughalocalareanetworkorwideareanetwork,andcanreceivePTZcontrolsignalsandaudiointercomsignalssentbytheclientatthesametime;

Thenetworkclientreferstotheuserterminalthatneedstoperformnetworkremotemonitoring.Itconsistsofacomputer(ordinaryofficecomputerorlaptop)andclientsoftware.Theclientismainlyresponsibleforfunctionssuchasimagedisplay,videorecording,playback,andPTZcontrol.Whentheclientperformsremotemonitoring,itneedstoenterausernameandpasswordforidentityverification,andremotemonitoringcanberealizedafterpassingtheauthentication.

Мониторингстатус

Системске функције

Therearetwotypesofremotemonitoringsystems.Oneisthatthereisnoon-sitemonitoringsystemattheproductionsite,butdirectlyafterdatacollection.Sendtoaremotecomputerforprocessing.Thiskindofremotemonitoringisnotmuchdifferentfromgeneralon-sitemonitoring,exceptthatthedatatransmissiondistanceisfartherthantheon-sitemonitoringsystem,andtheotherpartsarethesameastheon-sitemonitoringsystem;theotherison-sitemonitoringandremotemonitoringcoexist.Generally,fieldbustechnologyisusedtoconnectthesensors,monitoringequipment,etc.distributedineachdevice,sothatitenterstheintegratedunitstagefromthediscreteunitstage,andthentheservicesofeachmanagementsiteareconnectedwiththelocalareanetwork,thusformingtheinternalenterpriseNetwork(Intranet).Duetotheestablishmentofabasicnetworkinformationinfrastructure,equipmentmonitoringandmaintenancetechnologyhasenteredtheintegratedsystemstage,andresourcesandinformationsharingarebasicallyrealizedwithinaunit.

Функције које реализује даљинско управљање су следеће:

Samplingandprocessingfunctions:mainlydetecting,samplingandnecessarypreprocessingofvariousanalogordigitalquantitiesintheproductionprocess,andOutputincertainforms,suchasprintreports,displayscreensandTVs,toprovideproductionpersonnelwithdetaileddatatohelpthemanalyzeandunderstandtheproductionsituation;

Supervisionfunction:real-timedatadetected,Inaddition,theinstructionsandinputdataissuedbytheproductionpersonnelduringtheproductionprocessareanalyzed,summarized,sorted,calculatedandothersecondaryprocessing,andstoredasreal-timedataandhistoricaldatarespectively;

Managementfunctions:Useexistingvaliddata,images,reports,etc.toanalyzeworkingconditions,diagnosefaults,andpredictdangeroussituations,andalarmfaultsandemergenciesintheformofsoundandlight;

Controlfunction:Informationprocessingiscarriedoutonthebasis,andcontroloutputisformedaccordingtothecontrolstrategydecidedinadvance,whichdirectlyaffectstheproductionprocess.

TheremotemonitoringsystembasedonB/SandC/Sisamonitoringsystemthatusesthenetworkasacommunicationplatform.ItisbasedonHTTPtechnologyandhastheadvantagesofsimplicityandhighefficiency.Ithasbecomeoneofthemostadvancedinformationnetworks.Commonlyusedinformationinteractionplatform[2].UsingnetworkcommunicationtechnologySockettechnology,dataacquisitiontechnologyandobject-orientedsoftwaretechnologytorealizethesystemmanagement,usermanagement,equipmentmonitoringdatadisplayandalarmmodulesoftheentiresystem.Itsadvantageisthatitmakesfulluseofexistinglocalareanetworkresourcesandwideareanetworkresources.,Withthehighestprice-performanceratio,real-timeinformationacquisitionandreal-timecontrolasthecenter,torealizethecomprehensivesharingofinformation,resourcesandtasksandtheoverallmanagementofintegration.Forexample:themonitoringsystemprovidestheoperationstatusoftheequipmenttotheserver,andtheserversendsittotheclientsofeachnode.Thestaffcanunderstandtheworkingstatusandoperationstatusoftheentiresystemontheclientside(usuallyremote).Simplyput,forenterprises,itistomakefulluseofmoderntechnologytosolvetheproblemsofreal-timedatacollection,transmissionandprocessing,andreal-timecontrol.Itistheseadvantagesthatmakeitdeveloprapidly.

Withthecontinuousdevelopmentofnetworktechnology,remotemonitoringwillbemoreusedinthemanagementoftheproductionprocessofenterprises.ProfessionalandtechnicalpersonnelcanmanageandmaintaintheproductionprocessthroughtheInternet,optimizetheproductionprocess,andimprovetheequipmentTheavailabilityratewillultimatelyreduceproductioncostsandimproveefficiency.

Предности система

Withthehelpofremotemonitoring,thecompany’sinternalinformationnetwork(Intranet)andcontrolTheoperationstatusiscloselyintegratedwiththebusinessmanagementstrategyoftheenterprise,soastorealizethecomprehensiveautomationoftheenterprise,andtoestablishanetwork-widemonitoringdataandonlineknowledgeresourcedatabase.Throughremotemonitoring,real-timecollectionandrapidconcentrationofon-siteoperatingdatacanbeachieved,andon-sitemonitoringdatacanbeobtained,whichprovidesamaterialbasisforremotefaultdiagnosistechnology;throughremotemonitoring,technicianscanmonitorandcontroltheproductionsystemwithoutvisitingthesiteorharshenvironments.Andtheoperatingstatusandvariousparametersofthefieldequipment,sothattheprofessionallytrainedpersonnel.virtual.Inmanymonitoringlocations,itisconvenienttousetherichlocalsoftwareandhardwareresourcestoperformadvancedprocesscontrolonremoteobjectstomaintainthenormaloperationoftheequipment,therebyreducingthenumberofpersonnelonduty,andultimatelyachievingremoteunmannedorfewpersonnelonduty.Thepurposeofdownsizingandincreasingefficiency[3].

Moreandmoreenterprisegroupsareshowingacross-regionaldevelopmenttrend,usingnetworktechnologytorealizeremotemonitoring,reducingproductioncostsforenterprises,increasinglaborproductivity,increasingthetechnologicalcontentofenterpriseproducts,andenhancingenterpriseintegrationCompetitivestrengthandotheraspectsareofgreatsignificance.

Техничка питања

Withtherapiddevelopmentofnetworktechnologyandtheexpansionofmonitoringscope,themonitoringsystemhastransitionedfromsingle-machinemonitoringtonetworkmonitoringinthepast,buttherearestillsomeproblems.Firstofall,theproblemofinsufficientnetworkcommunicationtechnology.Networkcommunicationtechnologyisthemostcriticaltechnologyinremotemonitoringtechnology.However,networkcommunicationgenerallysimplyusesSockettechnology,evenFTPorEmail,etc.Thesetechnologieshavegreatadvantagesintermsoftheamountofdatatransmitted,theflexibilityofprogramming,andthesecurity.Theshortcomings,especiallyforthedatacollectionofmultipleendpointsinthefield,willgreatlyincreasethecomplexityofprogrammingandcannotmeettheneedsofremotemonitoringtechnologyfornetworkcommunication;secondly,thecoexistenceofmultiplestructuresinnetworkcommunication.Thestructureoftheremotemonitoringsystemismostlycomplex,andthedistributeddistanceislong.Therearealsodifferentlocalareanetworks,differentplatforms,andeventheoperatingplatformandprogramminglanguageinthesamelocalareanetwork.Theremaybedifferentproblems,whichrequiresdifferentplatformsintheintegratednetwork.Toachievemutualcommunication,andtheseproblemsaredifficulttosolveusingtraditionalmethods.

Развој система

Videosurveillancesystemhasdevelopedinjusttwodecades,analogsurveillanceishot,anddigitalsurveillanceisintheascendantofnetworkvideosurveillance.Earth-shakingchanges.AsIPtechnologygraduallyunifiestheworldtoday,itisnecessaryforustore-understandthehistoryofthedevelopmentofvideosurveillancesystems.Fromatechnicalpointofview,thedevelopmentofvideosurveillancesystemsisdividedintothefirstgenerationofanalogvideosurveillancesystems(CCTV),tothesecondgenerationofdigitalvideosurveillancesystems(DVR)basedon"PC+MultimediaCard",tothethirdgenerationofvideosurveillancebasedentirelyonIPnetworksSystem(IPVS).Thefirstgenerationofvideosurveillance:thetraditionalanalogclosed-circuitvideosurveillancesystem(CCTV):reliesonspecialequipmentsuchascameras,cables,videorecordersandmonitors.Forexample,thecameraoutputsavideosignalthroughadedicatedcoaxialcable.Thecableisconnectedtodedicatedanalogvideoequipment,suchasvideoscreensplitter,matrix,switcher,videocassetterecorder(VCR)andvideomonitor,etc.AnalogCCTVhasalotoflimitations:limitedmonitoringcapabilitiesonlysupportlocalmonitoring,whichislimitedbyanalogvideocabletransmissionlengthandcableamplifiers.Scalability-limitedsystemsareusuallylimitedbytheinputcapacityofvideosplitters,matrices,andswitchers.

Userswithheavyvideoloadsmustremovethemfromthevideorecorderorreplacethemwithnewvideotapesforstorage,andthevideotapesarepronetobelost,stolenoraccidentallyerased.

Poorvideorecordingqualityisthemainlimitingfactor.Thevideoqualitydecreasesasthenumberofcopiesincreases.

Thesecondgenerationofvideosurveillance:Thecurrent"analog-digital"surveillancesystem(DVR):videosurveillance

The"analog-digital"surveillancesystemisbasedonDigitalharddiskvideorecorderDVRisthecoresemi-analog-semi-digitalsolution.FromthecameratotheDVR,thecoaxialcableisstillusedtooutputvideosignals.TheDVRsupportsbothrecordingandplayback,andcansupportlimitedIPnetworkaccess.BecauseDVRproductsarediverseandthereisnostandard,Therefore,thisgenerationofsystemsisanon-standardclosedsystem,andtheDVRsystemstillhasalotoflimitations:

Thecomplexwiring"analog-digital"solutionstillneedstoinstallaseparatevideocableoneachcamera,resultinginwiringcomplexity.ThetypicallimitationofaDVRwithlimitedscalabilityisthatitcanonlyextendupto16camerasatatime.

LimitedmanageabilityYouneedexternalserversandmanagementsoftwaretocontrolmultipleDVRsormonitoringpoints.

Limitedremotemonitoring/controlcapabilitiesYoucannotaccessanycamerafromanyclient.YoucanonlyaccessthecameraindirectlythroughtheDVR.TheriskofdiskfailureComparedwithRAIDredundancyandtape,the"analog-digital"schemehasnoprotectionforvideorecordingandispronetoloss.Thethirdgenerationofvideosurveillance:thefuturecompleteIPvideosurveillancesystemIPVS:

Comparedwiththeprevioustwosolutions,therearesignificantdifferencesbetweentheall-IPvideosurveillancesystem.Theadvantageofthissystemisthatthecamerahasabuilt-inwebserveranddirectlyprovidesanEthernetport.ThesecamerasgenerateJPEGorMPEG4datafiles,whichcanbeaccessed,monitored,recordedandprintedbyanyauthorizedclientfromanylocationonthenetwork,ratherthangeneratingimagesintheformofcontinuousanalogvideosignals.

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