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