Kuze kube ngoku, ngenjongo yokukhusela, ukuhlolwa kwevidiyo kwenziwa ngeentlobo ezimbini zeekhamera - idijithali ne-analog. Idijithali ngabalandeli be-analog, kodwa oku kulandelwayo akulahlekelwa ukuthandwa kwabo namhlanje. Eli nqaku li malunga neekhamera ze-analog zeCCTV.
Ba sebenza njani?
I-lens yekhamera yevidiyo ithatha ukukhanya kombane kwaye iyondla kwi-matrix ye-CCD, iguqula ibe ngumqondiso wombane kwaye uyithumele kwi-cable kwisixhobo sokufumana. Iikhamera ze-Analog ze-surveillance zevidiyo zihluke kwiijitrikhi ukuba aziguquli umqondiso wombane kwikhowudi yebhanki, kodwa uyithumela kwindlela yokurekhoda kwifomu engatshintshiyo. Oku kwenza ukuba kube lula ukwenza inkqubo yokubeka iliso kwaye ingayisebenzisi impawu kwikhompyutha. Ndimele ndithi le khamera inokudibaniswa kumguquli wedijithali kwaye ufumane uphawu ukusuka kwiikhamera ezininzi zevidiyo.
Izixhobo zolu hlobo ziyakwazi ukuhambisa umfanekiso kwinethiwekhi ukuya naphi na kwihlabathi, kwaye kanye ngeendawo ezahlukeneyo, kuboniswa kwiihlolwe eziliqela kunyekanye. Kule nto, i-multiplexer isetyenzisiwe ukuba ifake umboniso wevidiyo kwizicwangciso ezininzi.
Iimpawu zeekhamera ze-analog zeCCTV:
- Imvume . I-low ye-480 i-TVL, umyinge oyi-480-540 i-TVL, kwaye phezulu i-540-700 i-TVL kwaye iphakamileyo. Iikhamera ze-Analog ze-CCTV zesisombululo esiphezulu zenza kube lula ukuhlula ubuso babantu abadlulayo kunye neelayisenisi zamatye kwiimoto ezikude. Inyaniso kunye ne-DVR kulo mzekelo kufuneka ukuba ufake ifowuni enamandla.
- Iifayili . I-1.5 lux esebenzayo isetyenziselwa ukudubula ekukhanyeni kwemini. Eyona nxalenye ephezulu ye-0.001 lux iyakwazi ukusebenza ngaphantsi kweliphi na ukukhanya.
- Iimpawu zelensi . I-F2.8 ihlanganisa i-angle yokujonga i-degrees ezingama-90, kunye ne-F 16 - akukho ngaphezu kwama-5 degrees.
Eyaziwayo kakhulu iikhamera ze-CCTV zangaphambili ze-CCTV, iimodeli zakutshanje ezisezixazululo eziphezulu, ezinokukwazi ukuthumela isignali kumgama ongama-500 mitha, amaxesha angama-20 ukwandisa umfanekiso kunye nokudubula nakumnyama, kungabikho mthombo okhanya kumgama we-100 m. I-IR-spotlight ingafihliwe ngento kwaye ifake ikhamera ecaleni kwendlela okanye umgwaqo omkhulu. Iikhamera ze-Analog zinikezela ukusebenzisana kwezixhobo ezivela kubakhiqizi abahlukeneyo, kulula ukuhlangana kunye nokwenza ngokwezifiso. Isixhobo sithatha yonke into kunye neendleko eziphantsi.