Yuav Ua Li Cas Xaiv Qhov Zoo Tshaj Plaws Cable rau CCTV Installation
Hauv lub ntiaj teb niaj hnub no uas muaj kev txawj ntse zuj zus, kev ruaj ntseg tau dhau los ua ib qho tseem ceeb heev. Ib txoj hauv kev los tswj kev ruaj ntseg ntawm cov khoom vaj khoom tsev yog los ntawm kev teeb tsa cov koob yees duab CCTV. Cov koob yees duab CCTV (Closed Circuit Television) pab saib xyuas thiab sau cov xwm txheej tshwm sim ntawm qhov chaw. Rau lub kaw lus CCTV kom ua haujlwm tau zoo tshaj plaws, kev xaiv cov xov hlau zoo yog qhov tseem ceeb heev. Tsab xov xwm no yuav piav qhia tob txog yuav ua li cas xaiv cov xov hlau zoo tshaj plaws rau koj qhov kev teeb tsa CCTV, xav txog ntau yam tseem ceeb xws li hom xov hlau, qhov zoo, thiab cov kev xav tau ntawm lub kaw lus.
Hom Cables rau CCTV
Muaj ntau hom cables uas siv rau hauv CCTV installations, txhua tus muaj nws tus kheej qhov zoo thiab qhov tsis zoo. Nov yog qee hom cables uas siv ntau tshaj plaws:
1. Coaxial Cable
Cov xov hlau coaxial yog ib qho ntawm cov xov hlau nrov tshaj plaws rau cov kab ke CCTV ib txwm muaj. Hom xov hlau no muaj ob hom tseem ceeb: RG59 thiab RG6.
– RG59: Cov xov hlau no zoo tagnrho rau qhov luv luv mus rau nruab nrab, kwv yees li 200-300 meters. Nrog lub hauv paus tooj liab me dua, RG59 yooj ywm heev thiab yooj yim siv hauv tsev lossis kev teeb tsa me me.
– RG6: Cov xov hlau no muaj lub hauv paus tooj liab loj dua thiab cov rwb thaiv tsev tuab dua, ua rau nws tsim nyog dua rau qhov deb ntev txog li 450 meters. Txawm li cas los xij, cov xov hlau no tawv dua li RG59, yog li nws yuav xav tau kev siv zog ntau dua thaum lub sijhawm teeb tsa.
2. Kab hlau sib txuas (Kab hlau sib txuas)
Cov xov hlau sib txuas ua ke, xws li Cat5e lossis Cat6 Unshielded Twisted Pair (UTP) cables, feem ntau siv rau hauv cov tes hauj lwm computer tab sis kuj tuaj yeem siv rau hauv CCTV systems siv video baluns.
– Cat5e: Lub cable no muaj peev xwm xa cov ntaub ntawv txog li 100Mbps thiab haum rau qhov deb txog li 100 meters.
– Cat6: Cov xov hlau no muaj qhov ceev dua, txog li 1Gbps, thiab kuj siv tau rau qhov deb ntawm 100 meters tab sis muaj lub teeb liab zoo dua.
3. Cov Kab Hlau Fiber Optic
Rau kev teeb tsa deb (ntau tshaj 500 meters), fiber optic cable yog qhov kev xaiv zoo. Cov cable no siv cov iav lossis yas fibers los xa cov teeb liab, uas tuaj yeem muab qhov tseeb thiab ruaj khov dua li cov cables tooj liab. Txawm hais tias kim dua thiab nyuaj dua rau kev teeb tsa, fiber optic cable zoo tagnrho rau cov kab ke CCTV loj xws li tshav dav hlau, chaw ntau pob, lossis thaj chaw lag luam.
Kev Zoo ntawm Cable
Qhov zoo ntawm cov xov hlau txiav txim siab qhov ua tau zoo ntawm koj lub CCTV system. Qee yam uas yuav tsum xav txog thaum ntsuas qhov zoo ntawm cov xov hlau yog:
1. Cov Khoom Siv Hluav Taws Xob
Cov xov hlau uas muaj cov hlau tooj liab ntshiab feem ntau muaj kev ua tau zoo dua li cov xov hlau uas ua los ntawm cov hlau txhuas lossis cov hlau cladding. Tooj liab ntshiab muaj kev coj hluav taws xob siab dua, ua rau kev xa cov ntaub ntawv ruaj khov dua thiab muaj kev cuam tshuam tsawg dua.
2. Txheej rwb thaiv tsev
Kev rwb thaiv tsev zoo tiv thaiv cov xov hlau los ntawm kev cuam tshuam sab nraud thiab kev puas tsuaj rau lub cev. Xaiv cov xov hlau uas tiv taus huab cua thiab hluav taws kub rau kev teeb tsa sab nraum zoov.
3. Kev tiv thaiv
Yuav kom tsis txhob muaj kev cuam tshuam hluav taws xob (EMI), cov xov hlau uas muaj txheej hlau tiv thaiv (shielding). Cov txheej no pab tswj qhov zoo ntawm lub teeb liab thiab tiv thaiv kev cuam tshuam los ntawm lwm cov khoom siv hluav taws xob nyob ze.
Kev Xam Qhov Ntev thiab Qhov Deb ntawm Cable
Kev nkag siab txog qhov deb ntawm lub koob yees duab thiab DVR/NVR (Digital/Network Video Recorder) yog qhov tseem ceeb heev rau kev txiav txim siab seb yuav siv txoj hlua twg. Nco ntsoov ntsuas qhov deb kom raug thiab xaiv txoj hlua uas tuaj yeem ua haujlwm tau yam tsis muaj kev poob qis ntawm cov teeb liab zoo. Piv txwv li, yog tias qhov deb ntau dua 100 meters, koj yuav pib muaj kev puas tsuaj ntawm Cat5e cable, yog li koj yuav tsum xav txog Cat6, cov cable coaxial zoo, lossis txawm tias fiber optic.
Lwm Yam Kev Xav Txog
Sib nrug ntawm hom thiab qhov zoo ntawm lub cable, muaj ntau lwm yam uas yuav tsum tau xav txog thaum xaiv lub cable zoo tshaj plaws rau CCTV installation, suav nrog:
1. Hom Koob Yees Duab thiab Tshuab
Hom koob yees duab CCTV uas koj siv (analog, digital, HD, lossis IP) tuaj yeem txiav txim siab hom cable uas haum tshaj plaws. Cov koob yees duab Analog feem ntau nyiam cov cables coaxial, thaum cov koob yees duab IP zoo tshaj plaws rau cov cables twisted pair (Cat5e lossis Cat6).
2. Ib puag ncig kev teeb tsa
Ib puag ncig uas lub cable yuav raug ntsia kuj muaj feem cuam tshuam loj heev. Yog tias nws raug ntsia sab nraum zoov lossis hauv qhov chaw uas muaj huab cua ib puag ncig hnyav heev (kub, txias, av noo), nco ntsoov xaiv lub cable tshwj xeeb uas tsim los rau cov xwm txheej ntawd.
3. Nyiaj txiag
Cov peev nyiaj kuj tseem cuam tshuam rau kev xaiv cov cable. Txawm hais tias cov cables zoo, xws li fiber optic, muaj ntau yam zoo, tab sis tus nqi siab dua yuav tsis yog qhov tsim nyog rau qhov xav tau ntawm cov haujlwm. Nws yog ib qho tseem ceeb kom nrhiav tau qhov sib npaug ntawm qhov zoo thiab cov peev nyiaj muaj.
4. Kev Sib Txuas thiab Kev Sib Haum Xeeb
Tsis tas li ntawd, xav txog qhov sib xws ntawm cov xov hlau nrog cov khoom siv CCTV uas koj yuav siv. Xyuas kom tseeb tias cov connectors muaj phim cov ports ntawm lub koob yees duab thiab DVR / NVR. Piv txwv li, coaxial cables feem ntau xav tau BNC connectors, thaum twisted pair cables siv RJ45 connectors.
Xaus
Xaiv cov xov hlau zoo tshaj plaws rau kev teeb tsa CCTV tsis yog ib txoj haujlwm me me. Yuav tsum tau xav txog kom zoo kom ntseeg tau tias koj lub kaw lus CCTV ua haujlwm zoo tshaj plaws thiab muab kev ruaj ntseg siab tshaj plaws. Thaum xaiv cov xov hlau, nco ntsoov xav txog hom xov hlau thiab qhov zoo, qhov deb ntawm kev teeb tsa, hom koob yees duab, ib puag ncig, peev nyiaj, thiab kev sib xws ntawm cov khoom siv. Yog tias koj npaj zoo thiab xaiv kom raug, koj yuav tsis tsuas yog txuag tau nyiaj xwb tab sis kuj ua kom koj lub kaw lus CCTV ua haujlwm tau zoo tshaj plaws.
Nco ntsoov tias kev ruaj ntseg yog kev nqis peev mus sij hawm ntev, thiab qhov zoo ntawm cov xov hlau yog ib feem tseem ceeb ntawm kev nqis peev ntawd. Tsis txhob yig los sab laj nrog tus kws tshaj lij lossis tus kws tshaj lij teeb tsa CCTV kom tau txais cov lus qhia uas haum rau koj cov kev xav tau tshwj xeeb. Los ntawm kev xaiv cov xov hlau zoo, koj tuaj yeem ua kom koj lub kaw lus CCTV ua haujlwm tau zoo thiab ntseeg tau, muab kev ruaj ntseg uas koj xav tau.
