Kungakhathaliseki ukuthi ufuna ikhamera yokuvikela yombono wasebusuku ngombala noma ikhamera yezokuvikela yangaphandle e-infrared, isistimu ephelele, eklanywe kahle incike ekukhetheni ikhamera yokuphepha yombono wasebusuku ehamba phambili nefaneleka kakhulu.Umehluko wezindleko phakathi kwamakhamera ombono wasebusuku wezinga lokungena kanye nombala ophezulu ungasukela ku-$200 kuya ku-$5,000.Ngakho-ke, ikhamera namanye ama-peripheral (njengamalambu e-IR, amalensi, amakhava okuvikela, nezinto zikagesi) kudingeka kucatshangelwe ngokugcwele ngaphambi kokunquma ukuthi iyiphi imodeli ongayikhetha.
Izigaba ezilandelayo zinikeza imihlahlandlela yokuthi yini okufanele uyicabangele ngaphambi kokukhetha nokufaka ikhamera yokuphepha enokukhanya okuphansi.
Naka indawo yokuvula ikhamera
Usayizi wembobo unquma inani lokukhanya elingadlula kulensi futhi lifinyelele inzwa yesithombe—izimbobo ezinkulu zivumela ukuchayeka okwengeziwe, kuyilapho ezincane zivumela ukuchayeka okuncane.Enye into okufanele siyiqaphele i-lens, ngoba ubude bokugxila kanye nosayizi wokuvula kuhambisana ngokuphambene.Isibonelo, ilensi engu-4mm ingafinyelela ukuvuleka okungu-f1.2 kuya ku-1.4, kuyilapho ilensi engu-50mm ukuya ku-200mm ingakwazi ukufinyelela kuphela umkhawulo wokuvuleka okungu-f1.8 kuya ku-2.2.Ngakho-ke lokhu kuthinta ukuchayeka futhi, uma kusetshenziswa nezihlungi ze-IR, ukunemba kombala.Isivinini sokuvala siphinde sithinte inani lokukhanya okufinyelela inzwa.Isivinini se-shutter yamakhamera okuphepha ombono wasebusuku kufanele agcinwe ku-1/30 noma 1/25 ukuze agadwe ebusuku.Ukuhamba kancane kunalokhu kuzoholela ekufiphaleni futhi kwenze isithombe singasebenziseki.
Ikhamera yokuvikela ileveli yokukhanya encane
Izinga lokukhanya eliphansi lekhamera yezokuphepha licacisa umkhawulo wokukhanya omncane lapho irekhoda khona ividiyo/izithombe zekhwalithi ebonakalayo.Abakhiqizi bekhamera bacacisa inani eliphansi lokuvula lezikhala ezihlukene, okuphinde kube ukukhanya okuphansi noma ukuzwela kwekhamera.Izinkinga ezingaba khona zingavela uma izinga elincane lokukhanya kwekhamera lingaphezulu kobubanzi besibane sesikhanyisi se-infrared.Kulesi simo, ibanga eliphumelelayo lizothinteka futhi isithombe esiphumela sizoba esinye sesikhungo esikhanyayo esizungezwe ubumnyama.
Lapho usetha izibani nezikhanyisi ze-IR, abafaki kufanele banake ukuthi izibani ze-IR ziyivala kanjani indawo edinga ukugadwa.Ukukhanya kwe-infrared kungagxuma ezindongeni futhi kuvale ikhamera.
Inani lokukhanya ikhamera elikutholayo lingesinye isici esingathinta kakhulu ukusebenza kwebanga lekhamera.Njengomthetho ojwayelekile, ukukhanya okwengeziwe kulingana nesithombe esingcono, esiba sibaluleke kakhulu emabangeni amakhulu.Ukuthola isithombe sekhwalithi ephezulu kudinga ukukhanya okwakhelwe ngaphakathi kwe-IR, okudla amandla engeziwe.Kulokhu, kungase konge kakhulu ukunikeza ukukhanya okwengeziwe kwe-IR ukuze kusekelwe ukusebenza kwekhamera.
Ukuze wonge amandla, amalambu acushwe inzwa (avuliwe, avuliwe, acushiwe, noma azwa ukushisa) angasethwa abe nomlilo kuphela lapho ukukhanya kwe-ambient kuwela ngaphansi kwezinga elibalulekile noma lapho othile esondela kunzwa.
Ukunikezwa kwamandla okuphambili kwesistimu yokuqapha kufanele kuhlanganiswe.Uma usebenzisa ukukhanya kwe-IR, izici okufanele zicatshangelwe zifaka isibani se-IR, i-IR LED, kanye namandla amanje kanye ne-voltage yokuphakelwa kwamandla.Ibanga lekhebula liphinde lithinte isistimu, njengoba yamanje iyancipha ngebanga elihanjiwe.Uma kunamalambu amaningi e-IR aqhelelene kakhulu namapayipi amakhulu, ukusebenzisa ugesi ophakathi kwe-DC12V kungase kubangele ukuthi izibani eziseduze nomthombo wamandla zibe namandla angaphezu kwamandla, kuyilapho izibani ezikude zibuthakathaka.Futhi, ukushintshashintsha kwamandla kagesi kungase kunciphise ukuphila kwezibani ze-IR.Ngesikhathi esifanayo, lapho i-voltage iphansi kakhulu, ingase ithinte ukusebenza ngenxa yokukhanya okunganele kanye nebanga lokuphonsa elinganele.Ngakho-ke, ukunikezwa kwamandla kwe-AC240V kuyanconywa.
Ngaphezu kwama-specs nama-database
Omunye umbono oyiphutha ovamile ukulinganisa izinombolo nokusebenza.Abasebenzisi bokugcina bavame ukuthembela kakhulu kumininingwane yedatha yekhamera lapho benquma ukuthi iyiphi ikhamera yokubuka ebusuku okufanele bayisebenzise.Eqinisweni, abasebenzisi bavame ukudukiswa yimininingwane yedatha futhi benze izinqumo ezisuselwa kumamethrikhi kunokusebenza kwangempela kwekhamera.Ngaphandle uma kuqhathaniswa amamodeli avela kumkhiqizi ofanayo, idatha yedatha ingadukisa futhi ayisho lutho mayelana nekhwalithi yekhamera noma ukuthi izosebenza kanjani endaweni yesehlakalo, ukuphela kwendlela yokugwema lokhu ukubona ukuthi ikhamera isebenza kanjani ngaphambi kokwenza isinqumo sokugcina.Uma kungenzeka, kuwumqondo omuhle ukwenza ukuhlola komkhakha ukuze uhlole amakhamera azoba khona futhi ubone ukuthi asebenza kanjani endaweni emini nasebusuku.
Isikhathi sokuthumela: May-07-2022