Dab tsi yog 7 yam ntawm CCTV?
CCTV, uas sawv cev rau lub TV kaw, yog lub kaw lus uas tso cai rau kev soj ntsuam thiab saib xyuas thaj chaw tshwj xeeb lossis thaj chaw. Nws tau dhau los ua cov cuab yeej tseem ceeb rau kev ruaj ntseg hauv ntau qhov chaw, suav nrog thaj chaw nyob, kev lag luam, thiab chaw pej xeem. Kev ua tau zoo ntawm CCTV system cia siab rau kev sib koom ua ke ntawm ntau yam khoom siv ua haujlwm ua ke los ntes, xa tawm, kaw, thiab tso saib video footage. Hauv tsab xov xwm no, peb yuav tshawb txog xya lub ntsiab lus tseem ceeb ntawm CCTV system thiab lawv lub luag haujlwm hauv kev tswj hwm kev nyab xeeb thiab kev nyab xeeb.
1. Lub koob yees duab
Cov koob yees duab yog qhov pom tseeb tshaj plaws thiab tseem ceeb ntawm txhua qhov system CCTV. Lawv yog lub luag haujlwm rau kev ntes cov duab video ntawm thaj chaw saib xyuas. CCTV koob yees duab tuaj nyob rau hauv ntau yam, xws li dome koob yees duab, mos txwv koob yees duab, PTZ (yias-tilt-zoom) koob yees duab, thiab cov koob yees duab zais. Txhua hom muaj nws cov yam ntxwv tshwj xeeb thiab tsim nyog rau kev soj ntsuam sib txawv. Cov koob yees duab CCTV niaj hnub no tau nruab nrog cov thev naus laus zis zoo xws li kev daws teeb meem siab, pom kev hmo ntuj, thiab ntau yam kev ua kom pom tseeb kom pom tseeb thiab meej, tsis hais lub teeb pom kev zoo li cas.
2. Lens
Lenses ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab qhov kev pom thiab theem ntawm kev nthuav dav uas tau ntes los ntawm CCTV koob yees duab. Lawv tuaj nyob rau hauv qhov sib txawv focal lengths, tso cai rau kev hloov kho ntawm lub peev xwm zoom thiab ntau qhov kev pab cuam. Wide-angle lo ntsiab muag ntes tau qhov dav dav ntawm qhov pom, tab sis nrog cov ntsiab lus tsawg dua, thaum lub koob yees duab telephoto muab lub kaum ntse dua tab sis nthuav dav dua. Varifocal lo ntsiab muag muab qhov yooj yim los kho qhov focal ntev manually, ua kom customization raws li kev saib xyuas tshwj xeeb.
3. Cov saib xyuas
Cov saib yog cov khoom siv los saib cov yeeb yaj kiab nyob lossis kaw los ntawm CCTV koob yees duab. Lawv tuaj nyob rau hauv ntau qhov ntau thiab tsawg thiab tso saib kev daws teeb meem. Kev xaiv ntawm kev saib yog nyob ntawm qhov ntsuas ntawm qhov kev soj ntsuam thiab cov qib xav tau ntawm kev nthuav dav. High-definition monitors feem ntau yog siv los xyuas kom meej thiab nkig pom. Qee lub sij hawm, ntau lub monitor yog siv los muab kev pom ib txhij ntawm cov koob yees duab sib txawv.
4. Digital Video Recorders (DVRs) lossis Network Video Recorders (NVRs)
Thaum cov vis dis aus raug ntes los ntawm CCTV koob yees duab, nws yuav tsum tau kaw thiab khaws cia rau yav tom ntej siv. DVRs thiab NVRs ua haujlwm rau lub hom phiaj no. DVRs yog siv rau analog koob yees duab systems, thaum NVRs yog siv rau IP lub koob yees duab systems. Cov cuab yeej no compress thiab encode cov ntaub ntawv video ua ntej khaws cia rau hauv lub hard drive lossis lwm qhov chaw cia khoom. Lawv tso cai rau cov neeg siv tshawb nrhiav, khaws, thiab tshuaj xyuas cov duab kaw raws li xav tau. Lub peev xwm cia ntawm DVRs thiab NVRs sib txawv, thiab nws tuaj yeem nthuav dav los ntawm kev ntxiv cov hard drives ntxiv lossis siv huab cia.
5. Cables thiab Connectors
Cables thiab connectors yog ib qho tseem ceeb Cheebtsam uas ua kom lub seamless kis ntawm video teeb liab los ntawm CCTV koob yees duab mus rau lub DVRs los yog NVRs. Coaxial cables, twisted-pair cables, thiab fiber optic cables feem ntau yog siv, nyob ntawm seb cov kev cai tshwj xeeb ntawm kev soj ntsuam. Cov khoom sib txuas xws li BNC (Bayonet Neill-Concelman) thiab RJ45 (Registered Jack 45) yog siv los tsim kev sib txuas ntawm cov koob yees duab, cables, thiab cov khoom siv kaw. Kev txhim kho kom zoo thiab kev saib xyuas cov cables thiab cov khoom sib txuas yog qhov tseem ceeb los tswj cov teeb liab kev ncaj ncees thiab txo qis video poob lossis cuam tshuam.
6. Fais fab mov
CCTV systems xav tau lub zog ruaj khov thiab txhim khu kev qha kom ua haujlwm tsis tu ncua. Fais fab mov units (PSUs) los yog lub hwj chim tshaj Ethernet (PoE) keyboards yog siv los muab lub hwj chim rau CCTV koob yees duab thiab lwm yam system Cheebtsam. PSUs hloov AC lub zog los ntawm lub ntsiab rau hauv DC lub zog tsim nyog rau CCTV system. PoE keyboards xa ob lub zog thiab cov ntaub ntawv hla Ethernet cables, tshem tawm qhov xav tau ntawm cov hluav taws xob sib cais. Cov khoom siv hluav taws xob thaub qab xws li cov khoom siv hluav taws xob tsis cuam tshuam (UPS) feem ntau yog ua haujlwm los xyuas kom meej lub zog ua haujlwm thaum lub hwj chim tawm.
7. Video Management Software (VMS)
Video Management Software (VMS) yog lub chaw tswj hwm ntawm CCTV system. Nws tso cai rau cov neeg ua haujlwm saib cov yeeb yaj kiab nyob lossis kaw, tswj lub koob yees duab txav (rau PTZ lub koob yees duab), teeb tsa cov lus tsa suab, teeb tsa lub tswb, thiab tswj hwm lwm yam kev teeb tsa. VMS muab cov neeg siv-phooj ywg interface uas ua rau muaj txiaj ntsig zoo saib xyuas thiab tswj tag nrho cov kev soj ntsuam. Nws kuj tso cai rau kev sib koom ua ke nrog lwm cov kev ruaj ntseg, xws li kev tswj xyuas kev nkag thiab lub tswb, los muab kev daws teeb meem kev nyab xeeb.
** Hauv kev xaus, xya lub hauv paus ntawm CCTV system - koob yees duab, lo ntsiab muag, saib, DVRs / NVRs, cables thiab connectors, fais fab mov, thiab video tswj software - ua hauj lwm ua ke los xyuas kom meej kev soj ntsuam thiab saib xyuas zoo. Kev nkag siab txog kev ua haujlwm thiab kev sib cuam tshuam ntawm cov khoom no yog qhov tseem ceeb rau kev tsim thiab siv CCTV system txhim khu kev qha thiab ua tau zoo. Txawm hais tias nws yog los tiv thaiv tsev, chaw lag luam, lossis chaw pej xeem, CCTV systems tau dhau los ua cov cuab yeej tseem ceeb hauv kev tswj xyuas kev nyab xeeb thiab kev nyab xeeb.**
