Ngethuba elidlulileyo, abantu abambalwa banakho ukufumana ividyo ebusuku. Ukongezelela, kwakungekho nto, kuba imithombo yokukhanya eqhelekileyo ingaphazamisa ukuphumla ebusuku kwabanye, ngelixa lichitha umbane omkhulu. Ngelo xesha, ngaphandle kokukhanyisa, iikhamera zivelisa umfanekiso ngaphandle kokucacileyo okufunekayo, zigqatso kakhulu. Namhlanje, umvelisi ucebisa ukucombulula le ngxaki ngenye indlela, usebenzisa iiprojekti ze-infrared for surveillance video.
Ziziphi izikhanyiso ze-IR zeekhamera zeCCTV?
Iimbanezelo ze-IR (okanye ze-infrared) zizixhobo zokukhanyisa ezisebenza kwii-bulb ezininzi ze-LED. Zincinci ngobukhulu. Kodwa into eyona nto ayiyona nto. Umkhanyiso we-IR usebenzisa ii-LED ezingaqhelekanga, kodwa i-infrared radiation. Ukuba neqondo elide kwi-940 -950 nm, ii-LED ezinjalo aziwa kulolo nxalenye yembalo ebonakala kwiso luntu. Oku kuthetha ukuba kwimeko yokutshintshwa kwiprojekti ye-IR engathinteli kubemi bezindlu ezikufutshane nekhamera kwaye ayinakuchukumisa abo bangenayo. Kule meko, iikhamera zeCCTV zirekhoda okwenzekayo ngezinga eliphezulu lokucaca.
Ukongezelela, ii-LED zibonakaliswe ngokusetyenziswa kwamandla amancinci, nangona kunjalo ukuba basebenze ubusuku bonke. Oku kuza kusindisa kakhulu kwiingxelo zamandla ezinamandla kubanikazi bezohwebo ezinkulu, igumbi okanye indawo yeofisi.
Unokukhetha njani ukukhanya kwe-IR ukujonga ividiyo?
Kuze kube yimanje, i-market ekhethekileyo imele imele i-assortment enkulu, ukukhetha okulungileyo kuba nzima kakhulu.
Enye yeendlela ezibaluleke kakhulu zokuthenga yintengantengwane. Ukuba ufuna ukuba injector ingabonakali ngokupheleleyo, kufuneka ufumane iimveliso ezine-900 nm nangaphezulu. Ukuba ufaka i-IR-injector nge-longueur ye-700 ukuya kwi-850 nm, ngoko kubumnyama obupheleleyo kuya kubakho ukuqwalasela ukukhanya okubuthathaka kwe-backlight.
Olunye udidi lwe-parameter-detection-ubala umgama apho isixhobo sichaza ngokucacileyo inani lomntu. Nangona kunjalo, esi sibonakaliso sincike ekubeni nobuzwe bekhamera ngokwalo, kunye nesisombululo sayo. Iiprojekti ze-IR ezide zikwazi ukufikelela malunga ne-40 m, encinci - imitha ezili-10 kuphela.
Ukusuka kwinqanaba lokukhanyisa kwe-IR-injector kuxhomekeke ekungakanani ummandla ukhanyisiwe, kwaye ngoko ke i-angle yekhamera. Ngokuqhelekileyo isibonakaliso siyahluka ukusuka kuma-20 kuya kuma-60 degrees.
Iprojekti ye-infrared inikwe amandla ukusuka kumandla kunye ne-voltage ye-12 volts.