Noma ngabe ufuna ikhamera yezokuphepha ye-Night Vision Vision noma i-infrared yangaphandle, uhlelo oluphelele, olwenziwe kahle luxhomeke ekukhetheni ikhamera yokuphepha engcono kakhulu futhi efanelekile ebusuku. Umehluko wezindleko phakathi kokungena kwamazinga okungenayo kanye namakhamera we-High-End Night Night Vision angasukela ku- $ 200 kuya ku- $ 5,000. Ngakho-ke, ikhamera nezinye izibani (ezinjengezibani ze-IR, amalensi, izembozo zokuvikela, kanye nokuhlinzekwa kwamandla) kudingeka ukuthi zicatshangwe ngokugcwele ngaphambi kokunquma ukuthi yiliphi imodeli ongayikhetha.
Lezi zingxenye ezilandelayo zihlinzeka ngemikhombandlela ethile yokuthi yini okufanele uyicabangele ngaphambi kokukhetha nokufaka ikhamera yezokuphepha ephansi.
Naka ukuthambekela kwekhamera
Usayizi we-AperTure unquma inani lokukhanya elingadlula lens futhi lifinyelele ezinhlaka ezikhudlwana ze-innsor-innsor zivumela ukuvezwa okuningi, kanti amancane avumela ukuvezwa okuncane. Enye into ebaluleke kakhulu i-lens, ngoba ubude obugxile kanye nobukhulu bokuhlunga balingana ngokungapheli. Isibonelo, ilensi engu-4mm ingafinyelela i-apertilu ye-F1.2 kuya ku-1.4, ngenkathi ilensi engu-50mm iye ku-200mm ifinyelela kuphela isithako esiphezulu se-F1.8 kuya ku-2.2. Ngakho-ke lokhu kuthinta ukuvezwa futhi, lapho kusetshenziswa izihlungi ze-IR, ukunemba kombala. Ijubane le-shutter libuye lithinta inani lokukhanya okufinyelelwe inzwa. Ijubane le-shutter lamakhamera wokuphepha ebusuku kufanele ligcinwe ngo-1/30 noma 1/25 ukubhekwa ebusuku. Ukuhamba kancane kunalokhu kuzophumela ekufiphele futhi kwenze isithombe singasebenziseki.
Izinga lokukhanya kwekhamera yokuphepha
Ileveli yokukhanyisa yekhamera yezokuphepha icacisa umkhawulo wesimo esincane sokukhanya lapho irekhodi khona amavidiyo / izithombe ezisezingeni eliphakeme. Abakhiqizi bekhamera bacacisa inani eliphansi kakhulu le-aperture lezipelevu ezahlukahlukene, okubuye kube ukukhanya okuphansi kakhulu noma ukuzwela kwekhamera. Izinkinga ezingaba khona zingavela uma izinga lokukhanya elincane lekhamera liphakeme kunesibonelelo se-infrared isibani. Kulokhu, ibanga elisebenzayo lizothinteka futhi isithombe esiphumela sizoba ngesikhungo esikhanyayo esizungezwe ubumnyama.
Lapho usetha amalambu nezibani ze-IR, abafaki kufanele banake indlela amalambu we-IR amboza ngayo indawo edinga ukubhekelwa. Ukukhanya okungenampilo kungaphuma ezindongeni futhi ungaboni ikhamera.
Inani lokukhanya ikhamera elithola elinye isici esingathinta kakhulu ukusebenza kwekhamera. Njengomgomo ojwayelekile, ukukhanya okwengeziwe kulingana nomfanekiso ongcono, ohambisana kakhulu kumabanga amakhulu. Ukuthola isithombe esezingeni eliphakeme kudinga ukukhanya okwenele okwakhelwe ngaphakathi, okudla amandla amaningi. Kulokhu, kungahle kube kubiza kakhulu ukuhlinzeka ngokukhanya okungeziwe kwe-IR ukusekela ukusebenza kwekhamera.
Ukugcina amandla, amalambu asuselwa kwisensor (asebenze kancane, asebenze ngokukhanyayo, noma ukuzwela okusebenzayo, noma okushisayo okushisayo) kungasetwa umlilo kuphela lapho kukhanya khona lapho kusondela ku-sensor.
Ukuhlinzekelwa kwamandla okungaphambili kohlelo lokuqapha kufanele lubukwe. Lapho usebenzisa ukukhanya kwe-IR, izici okufanele uzicabange zifaka isibani se-IR, i-IR LED, kanye namanje kanye namandla kagesi wokuhlinzekwa kwamandla. Ibanga lekhebula libuye lithinta uhlelo, njengoba kuncipha kwamanje ngebanga elihambile. Uma kunamalambu amaningi e-IR aqhelelene kude namamain, esebenzisa ukunikezwa kwamandla aphakathi kwe-DC12V kungenza amalambu asondele kakhulu emthonjeni wamandla wokuba namandla amakhulu, ngenkathi amalambu kude kakhulu. Futhi, ukuguquguquka kwe-voltage kunganciphisa impilo yamalambu e-IR. Ngasikhathi sinye, lapho i-voltage iphansi kakhulu, ingathinta ukusebenza ngenxa yokukhanya okunganele futhi ibanga elinganele. Ngakho-ke, kunconywa amandla kagesi we-AC240V.
Ngaphezu kwama-specs nama-dasherts kuphela
Omunye umbono ongemuhle ojwayelekile ukulingana nezinombolo ngokusebenza. Abasebenzisi bokugcina bavame ukuncika kakhulu kuma-dashshoets ekhamera lapho enquma ukuthi iyiphi ikhamera ye-Night Vision okufanele uyisebenzise. Eqinisweni, abasebenzisi bavame ukudukiswa yi-datasheets futhi benze izinqumo ngokuya ngamamethrikhi kunokuba kusebenze kwangempela kwekhamera. Ngaphandle kokuthi ukuqhathanisa amamodeli avela kumenzi ofanayo, i-datasheet ingadukisa futhi ayisho lutho ngekhwalithi yekhamera noma ukuthi izokwenzela kanjani lokhu ukubona ukuthi ikhamera isebenza kanjani ngaphambi kokwenza i isinqumo sokugcina. Uma kungenzeka, kuwumqondo omuhle ukwenza isivivinyo sensimu ukuze uhlole amakhamera azoba khona futhi ubone ukuthi enza kanjani kule ndawo phakathi nemini nobusuku.
Isikhathi sePosi: Meyi-07-2022