Camera voor auto's

Basisinformatie
Chinese naam
Camera voor auto's
functie
De functie van het presenteren van video's en audio
effect
De behandeling van verkeersongevallen biedt een meer wetenschappelijke basis
catalogus
1 Functie
2 Prestaties
3 lenzen
4 Werkingsbeginsel
5 Installatievereisten

functie
1. Betrouwbare bewijzen verstrekken voor de analyse en beoordeling van verkeersongevallen
2. Gemakkelijk voor bestuurders en passagiers om de toestand in de auto te controleren
3. Een basis bieden voor de behandeling van geschillen over verloren en gevonden voorwerpen, diefstalpreventie en andere kwesties onder de passagiers in het voertuig
4. Bewaking van de binnen- en buitenomgeving van het voertuig om de veiligheid van het gebruik van het voertuig te waarborgen
opvouwen

prestaties
De prestaties van autocamera's kunnen worden beoordeeld aan de hand van de volgende aspecten:
1 、 Chips
CCD and CMOS chips are important components of the reverse camera which can be divided into CCD and CMOS according to their different components CMOS is mainly used in products with lower image quality Its advantages are lower manufacturing cost and power consumption compared to CCD but its disadvantage is that CMOS cameras have higher requirements for light sources CCD is a high - end technology component used in photography and videography which also comes with a video capture card CCD and CMOS have a significant difference in technology and performance Generally speaking CCD has better performance but it is also more expensive It is recommended to choose a CCD camera without considering the cost

2 、 Duidelijkheid
Clarity is one of the important indicators for measuring cameras Generally speaking products with high clarity will have better image quality Products with a clarity of 420 lines have become the mainstream product for reverse cameras while products with a clarity of 380 lines can also be chosen if well tuned There are better chips such as 480 wire 600 wire 700 wire etc However depending on the chip level of each camera the level of photosensitive components including the level of debugging technicians products of the same chip and grade may present different quality effects It also depends on what kind of lens is used, en objectieven van goede materialen hebben veel betere beeldpresentatie effecten In tegendeel High Definition producten zullen een aantal kortingen op nachtzicht effecten

3 、 Nachtzicht
Het nachtzicht effect is gerelateerd aan de helderheid van het product Hoe hoger de helderheid hoe slechter het nachtzicht effect van het product Dit komt door de chip zelf. high - quality products have night vision function and do not produce image effects on objects Although the color may be slightly different clarity is not a problem If there is infrared night vision fill or LED white light fill night vision will be clearer and more visible

4 、 Waterdichtheid
De meeste camera's zijn waterdicht.
Om samen te vatten bij het kiezen van een achteruit camera moeten we rekening houden met de bovenstaande aspecten en het belangrijkste is om te zien en te vergelijken van het werkelijke effect van het beeld

5 、 Speciale achteruitkamera voor speciale voertuigen
Many cars have already produced specialized reverse cameras that can be used with over 500 models When choosing be sure to first choose your own model specific reverse camera If not then choose a universal reverse camera

6 、 Universele camera
Algemene camera's omvatten 18.5mm perforated cameras small butterfly external cameras license plate frame cameras 28mm perforated cameras bus cameras and other external cameras such as LED night vision color external cameras for car navigators

lens
De lens van de auto gemonteerde camera is het kerncomponent en de vier belangrijkste parameters zijn als volgt
Foldbare brandpuntsafstand
The size of the focal length determines the size of the field of view angle When the focal length value is small the field of view angle is large and the observed range is also large but the resolution of distant objects is not very clear The focal length value is large the field of view angle is small and the observation range is small As long as the focal length is selected appropriately even distant objects can be seen clearly Due to the one - to - one correspondence between focal length and field of view angle a determined focal length means a determined field of view angle Therefore when selecting a lens focal length it is important to fully consider whether the observation details are important or whether a large observation range is important If you want to see details choose a long focal length lens If you are watching close - up scenes choose a wide - angle lens with a small focal length

Folding diafragma coëfficiënt

De lichtstroom die wordt weergegeven door F wordt gemeten door de verhouding van de brandpuntsafstand f van het objectief tot het diafragma D. Elk objectief wordt gemarkeerd met een maximale F-waarde, bijvoorbeeld 6 mm / F1.4 betekent een maximum diafragma van 4 . 29 millimeters The luminous flux is inversely proportional to the square of the F - value and the smaller the F - value the greater the luminous flux The scale values of the aperture index sequence on the lens are 1.4 2 2.8 4 5.6 8 11 16 22 etc The pattern is that the exposure amount at the previous scale value is exactly twice that of the corresponding exposure amount at the latter scale value That is to say the aperture of the lens is 1 / 1.4 1 / 2 1 / 2.8 1 / 4 1 / 5.6 1 / 8 1 / 11 1 / 16 1 / 22 respectively The former value is twice the root of the latter value Therefore the smaller the aperture index the larger the aperture and the greater the illumination on the imaging target surface In addition the aperture of the lens can be divided into manual IRIS and automatic IRIS When used in conjunction with a camera manual aperture is suitable for situations where there is not much change in brightness Its light intake is adjusted through the aperture ring on the lens until it is suitable in one go The automatic aperture lens will automatically adjust according to the changes in light and is used in outdoor entrance and other places with large and frequent light changes

Automatische irislens
Automatische diafragma-lenzen zijn onderverdeeld in twee categorieën: one is called video (VIDEO) drive type and the lens itself contains an amplifier circuit to convert the video amplitude signal transmitted by the camera into control of the aperture motor Another type is called DC drive type which uses the DC voltage on the camera to directly control the aperture This type of lens only includes an ammeter type aperture motor and requires an amplifier circuit inside the camera For various types of automatic aperture lenses there are usually two adjustable knobs One is the ALC adjustment (metering adjustment) which has two options peak metering and average metering based on target lighting conditions Generally the average metering level is taken Another is LEVEL adjustment (sensitivity) which can make the output image bright or dim

Opvouwbare zoomlens
Er zijn twee soorten zoomlenzen: manual zoom lenses and electric zoom lenses Manual zoom lenses are generally used for scientific research projects rather than in closed - loop monitoring systems When monitoring large scenes the camera usually needs to be used in conjunction with an electric lens and pan tilt The advantage of an electric lens is that it has a large zoom range which allows for viewing a wide range of situations and focusing on certain details In addition the pan tilt can rotate up down left and right resulting in a very large viewing range Electric lenses have multiple magnifications such as 6x 10x 15x 20x etc If you know the reference focal length you can determine the variable range of the lens focal length For example a 6x electric lens with a reference focal length of 8 .5 millimeter zou een continu verstelbaar zoombereik van 8,5 tot 51 millimeter en een gezichtsveldhoek van 31,3 tot 5 millimeter hebben.5 degrees The control voltage of electric lenses is generally 8V ~ 16V DC with a maximum current of 30mA So when selecting a controller it is important to fully consider the length of the transmission cable If the distance is too far the voltage drop generated by the line will cause the lens to be uncontrollable Therefore it is necessary to increase the input control voltage or replace the video matrix host with a decoder for control
Naast de bovenstaande vier punten zijn er zeker andere kleine kennis, maar het beheersen van deze vier indicator coëfficiënten kan geschikt zijn voor de configuratie en toepassing van de lens

werkingsbeginsel
The camera power is connected to the reverse taillights When reverse gear is engaged the camera synchronizes power supply and enters the working state The collected video information is sent to the wireless receiver located at the front of the car through the wireless transmitter The receiver transmits the video information to the GPS navigator through the AV IN interface This way when the receiver receives the signal regardless of whether the Gps navigator is in any operating interface We will prioritize providing LCD screens for reverse image videos

The difference between the use of car mounted cameras car mounted displays and car mounted DVD navigation systems as well as portable GPS navigation systems is that when using car mounted displays the car mounted displays do not need to be turned on As long as reverse gear is engaged the car mounted displays will automatically display the image of the car mounted camera The car DVD navigation can only display the car camera image under normal startup conditions When using a portable GPS navigation system it is necessary to turn on the navigation system before displaying the car camera image

Vijf. Because the industry of in car cameras has just started customers initially did not have high requirements for this color and the price of color is also relatively expensive However with the development of technology color cameras will also become more and more widespread

6. De installatiekosten van een bus omvatten hoofdzakelijk de volgende aspecten: host cost camera cost hard drive cable installation cost The price of different host equipment varies and the price of different camera quantities also varies The host price in the market itself varies greatly