Cámara montada en automóvil

Información básica
Nombre chino
Cámara montada en automóvil
Función
La función de presentar vídeos y audio
efecto
La gestión de accidentes de tráfico proporciona una base más científica
el catálogo
1 Función
2 Desempeño
3 lentes
4 Principio de funcionamiento
5 Requisitos de instalación

Función
1. Proporcionar pruebas fiables para el análisis y juicio de los accidentes de tráfico
2. Conveniente para los conductores y pasajeros para comprobar el estado dentro del coche
3) Proporcionar una base para manejar disputas de objetos perdidos y encontrados, prevención de robos y otros asuntos entre los pasajeros en el vehículo
4. Proporcionar el control del entorno interior y exterior del transporte para garantizar la seguridad de la operación del vehículo
Plegar

rendimiento
¿ Qué tipo de cámara de coche es buena? El rendimiento de las cámaras montadas en el coche se puede evaluar a partir de los siguientes aspectos
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 、 Claridad
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, y las lentes hechas de buenos materiales tendrán efectos de presentación de imagen mucho mejores Al contrario, los productos de alta definición tendrán algunos descuentos en los efectos de visión nocturna.

Visión nocturna
El efecto de visión nocturna está relacionado con la claridad del producto Cuanto mayor sea la claridad peor será el efecto de visión nocturna del producto Esto se debe al propio chip Sin embargo, 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 、 Impermeabilización
La mayoría de los productos de cámara inversa tienen una función impermeable
Para resumir al elegir una cámara trasera debemos considerar los aspectos anteriores y lo más importante es ver y comparar el efecto real de la imagen

5 、 cámara de marcha atrás dedicada para vehículos especiales
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 、 cámara universal
Las cámaras de uso general incluyen 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

lente
La lente de la cámara montada en el coche es el componente central y los cuatro parámetros clave son los siguientes
Distancia focal plegable
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

Coeficiente de apertura plegable

El flujo de luz representado por F se mide por la relación entre la distancia focal de la lente f y la apertura D Cada lente está etiquetada con un valor máximo de F, por ejemplo, 6 mm / F1.4 representa una apertura máxima de 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 5.4 2 2.8 4 5.4 2 2.8 4 5.4 2 2.86   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

Lente de iris automática
Las lentes de apertura automática se dividen en dos categorías:  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

Objetivo de zoom plegable
Hay dos tipos de lentes de zoom:  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 milímetros tendría un rango de zoom ajustable continuamente de 8,5 a 51 milímetros y un ángulo de campo de visión de 31,3 a 5.5 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
Además de los cuatro puntos anteriores, ciertamente hay otros conocimientos menores, pero el dominio de estos cuatro coeficientes de indicador puede ser adecuado para la configuración y aplicación de la lente

Principio de funcionamiento
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

- ¿ Qué?  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. El coste de instalación de un autobús incluye principalmente los siguientes aspectos:  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