Taw qhia
CCTV lossis Closed Circuit Television yog ib qho system uas siv rau kev soj ntsuam thiab kev nyab xeeb lub hom phiaj. Lub kaw lus muaj cov koob yees duab, lub chaw saib xyuas, thiab cov kaw lus kaw. CCTV koob yees duab siv lub koob yees duab yees duab xa cov teeb liab mus rau ib qho chaw tshwj xeeb, lub chaw saib xyuas, lossis lub computer. Nws yog siv los saib xyuas ob qho tib si sab hauv tsev thiab sab nraum zoov kom muaj kev ruaj ntseg rau lub tsev lossis khoom. Hauv tsab xov xwm no, peb yuav tham txog peb hom CCTV systems.
Analog CCTV
Analog CCTV yog thawj thiab qhov yooj yim tshaj plaws ntawm CCTV system. Cov koob yees duab analog tau nyob ib puag ncig ntev, thiab lawv siv lub coaxial cable los xa cov teeb liab video mus rau lub kaw lus. Cov koob yees duab analog thaum ntxov tau siv VHS tapes ua qhov nruab nrab ntawm cov ntaub ntawv kaw, tab sis lawv tau dhau los ntawm cov kaw lus digital. Cov yees duab zoo ntawm cov koob yees duab analog yog qis dua piv rau cov koob yees duab digital, tab sis lawv tseem nrov vim lawv pheej yig thiab yooj yim rau nruab.
Analog koob yees duab tuaj nyob rau hauv ob hom: mos txwv koob yees duab thiab dome koob yees duab. Cov koob yees duab mos txwv zoo li lub mos txwv thiab raug ntsia sab nraum zoov. Lawv feem ntau yog ntsia rau ntawm phab ntsa lossis ncej. Dome koob yees duab, ntawm qhov tod tes, yog ntsia rau ntawm lub qab nthab thiab zoo li lub dome. Lawv tau siv rau kev soj ntsuam sab hauv tsev thiab tsis tshua pom pom dua li cov koob yees duab mos txwv.
Digital CCTV
Digital CCTV yog ntau tshaj li analog CCTV. Hom kab ke no siv cov teeb liab digital los xa cov ntaub ntawv video thiab suab. Digital CCTV koob yees duab tsim cov duab zoo thiab cov yeeb yaj kiab uas tuaj yeem pom los ntawm qhov chaw nyob deb. Hom CCTV system no siv lub koob yees duab IP, uas txuas nrog lub network hauv internet. Cov koob yees duab xa video footage mus rau lub recorder, uas khaws cov footage nyob rau hauv cov ntaub ntawv drives.
Digital CCTV koob yees duab tuaj nyob rau hauv ntau hom thiab yog siv rau txawv soj ntsuam lub hom phiaj. Cov koob yees duab sab hauv tsev yog siv los saib xyuas thaj chaw sab hauv, thaum lub koob yees duab sab nraum zoov siv los saib xyuas thaj chaw sab nraum zoov. Lub koob yees duab infrared yog siv los saib xyuas thaj chaw uas muaj teeb pom kev tsis zoo, thaum lub koob yees duab PTZ yog siv rau kev soj ntsuam hauv cheeb tsam loj. PTZ koob yees duab tuaj yeem yias, qaij, thiab zoom, uas ua rau nws yooj yim dua los saib xyuas thaj chaw loj nrog ib lub koob yees duab.
Wireless CCTV
Wireless CCTV yog hom tshiab ntawm CCTV system thiab tau txais koob meej vim nws yooj yim rau nruab thiab tswj. Hom kab ke no siv wireless thev naus laus zis los xa cov teeb liab video mus rau lub kaw lus lossis lub chaw saib xyuas. Wireless CCTV koob yees duab siv Wi-nkaus lossis Bluetooth txuas los sib txuas lus nrog cov cuab yeej kaw.
Cov koob yees duab yog siv roj teeb thiab tuaj yeem ntsia tau rau hauv txhua qhov chaw yam tsis tas yuav siv cov cables lossis xov hlau. Wireless CCTV koob yees duab tuaj nyob rau hauv ntau qhov sib txawv thiab cov duab thiab tuaj yeem siv rau kev soj ntsuam sib txawv. Lawv yooj yim rau nruab thiab tuaj yeem nkag mus tau deb ntawm lub smartphone lossis lub computer.
Xaus
Hauv kev xaus, cov no yog peb hom CCTV systems: analog CCTV, digital CCTV, thiab wireless CCTV. Analog CCTV yog hom yooj yim tshaj plaws thiab pheej yig tshaj plaws ntawm cov kab ke, thaum digital CCTV yog ntau dua thiab tsim cov duab zoo. Wireless CCTV yog hom tshiab tshaj plaws ntawm cov kab ke thiab tau txais koob meej vim nws qhov yooj yim ntawm kev teeb tsa thiab kev saib xyuas. Thaum xaiv lub kaw lus CCTV, nws yog ib qho tseem ceeb uas yuav tsum xav txog tus nqi, kev soj ntsuam xav tau, thiab txhua yam kev txwv ntawm qhov system.
