Common Faults Of Surveillance Cameras

1. Lub tshuab infrared hemisphere series muaj cov duab tsis zoo illumination, whitishness lossis ci dawb aperture thaum hmo ntuj.

Qhov tshwm sim no tshwm sim los ntawm kev sib dhos tsis raug ntawm lub tshuab. Thaum lub photosensitive ntaus ntawv (photoresistor) nyob deb dhau ntawm lub hemisphere thaum lub sij hawm sib dhos, lub teeb infrared yuav tsis ua kom tiav, ua rau lub teeb pom kev hmo ntuj tsis zoo ntawm lub tshuab; qhov tshwm sim ntawm cov duab whitening lossis ci dawb aperture yog feem ntau tshwm sim los ntawm lub teeb infrared emitting raj. Lub teeb infrared yog refracted rau lub lens los ntawm lub hau npog. Txoj kev daws teeb meem rau qhov tshwm sim no yog kom tsis txhob muaj lub teeb infrared refracted rau saum npoo ntawm lub lens. Feem ntau, lub nplhaib daim txhuam cev yog siv los cais lub lens ntawm lub teeb infrared. Lub dome npog yuav tsum tau nruj nreem txuas rau lub nplhaib daim txhuam cev thaum sib dhos.

2. Cov duab ntawm lub qhov muag pom kev hmo ntuj infrared waterproof tshuab yog ib txwm thaum nruab hnub, tab sis tig dawb thaum hmo ntuj

Qhov tshwm sim no feem ntau tshwm sim los ntawm kev xav hauv ib puag ncig uas siv lub tshuab siv lossis siv hauv qhov chaw me me. Nws yog tshwm sim los ntawm kev xav ntawm lub teeb infrared. Txhawm rau daws qhov tshwm sim no, ua ntej txiav txim siab seb puas muaj cov reflectors nyob rau hauv ib puag ncig ntawm kev siv, txhim kho ib puag ncig kom ntau li ntau tau, thiab tom qab ntawd xyuas cov teeb pom kev zoo infrared ntawm lub tshuab. Txawm hais tias qhov kev ncua deb sib haum rau qhov kev siv tiag tiag; Yog hais tias lub tshuab infrared ntev siv nyob rau hauv qhov chaw me me, lub tshuab duab yuav dawb vim yog lub teeb infrared ntau dhau.

3. Tsis muaj duab

Ua ntej, xyuas seb qhov polarity ntawm cov khoom siv hluav taws xob sab nraud puas yog thiab seb qhov tso zis hluav taws xob puas ua tau raws li qhov yuav tsum tau ua (lub zog yuam kev: DC12V ± 10 feem pua, AC24V ± 5 feem pua), thiab tom qab ntawd xyuas seb qhov kev sib txuas video puas muaj kev sib cuag zoo; Yog tias siv lub lens aperture, xyuas seb lub aperture yog qhib, thiab qhov tsis siv neeg Lub aperture lens yuav tsum tau kho LEVEL potentiometer kom lub aperture nyob rau hauv txoj hauj lwm zoo.

4. Xim distortion thiab xim cam

Tej zaum nws yuav yog qhov hloov pauv dawb (AWB) tsis raug teeb tsa kom raug, lossis lub teeb pom kev nyob ib puag ncig tau hloov ntau dhau. Lub sijhawm no, koj yuav tsum xyuas seb qhov chaw hloov pauv puas nyob hauv OFF txoj haujlwm, thiab koj yuav tsum nrhiav txoj hauv kev los txhim kho lub teeb pom kev zoo.

5. Cov duab yog distorted los yog geometrically distorted

Qhov tshwm sim no tej zaum yuav yog ib qho teeb meem nrog lub geometric kho Circuit Court ntawm lub koob yees duab los yog saib los yog ib qho teeb meem nrog lub optical lens, los yog tej zaum nws yuav yog hais tias tus yam ntxwv impedance ntawm lub video kev twb kev txuas cable los yog ntaus ntawv tsis phim cov zis impedance ntawm lub koob yees duab. Thaum qhov tshwm sim saum toj no tshwm sim, thov xyuas seb lub lens optical siv puas yog qhov txawv txav thiab seb qhov input impedance hloov ntawm tus saib yog teem rau 75Ω, thiab tom qab ntawd xyuas seb qhov impedance ntawm cov video txuas cable yog 75Ω.