The beginning of the preface is actually very early
The car imaging system is a thing that sounds very high-end and even mysterious, but he is not so complicated. The "reverse image" system that many consumers often ask when buying a car is one of the most common car image products. The author's ability, we have no way to prove which car was the first to join the reversing image, but according to several experts around, similar systems have joined some large vehicles more than a decade ago, after all, the car body is bigger, The more visual dead angles.
After that, the reversing image was introduced into the small car. We will know about the following things. The reversing image application is more and more widely used. Even some self-owned brand compact cars have joined the reversing image system, and even even appeared. Some models simply abandoned the reversing radar and replaced it with a reversing image system. All in all, reversing images is the beginning of most people's understanding of car imaging systems, but at the beginning of the article, we first give a definition of what car imaging technology is, and then talk about their applications and their future development.
Defining a car image is a trick
Although it is a bit frustrating to start with such a sentence, at present, there is no precise definition of car image technology in the whole network or even the whole world. However, I can still simply summarize it here, and then use the "optical imaging system" or "Ranging system"-based products can be regarded as automotive image related products.
Many people may not know that the rangefinder itself is an image product.
In other words, in fact, our most common image product should be the reversing radar. However, the ranging system is not enough for ordinary people to "image". However, from the technical principle, the distance measurement and imaging system are closely related. . From the technical history point of view, the reversing radar should appear between 1950 and 1960, and the domestic side will be fully popular at the end of the 20th century and the beginning of the 21st century.
Reversing radar is currently the most popular automotive imaging product
After that, image technology entered a period of rapid development. The reversing images and panoramic images belong to our more conventional cognitive products. The infrared night vision system is also a good extension. As for smart headlights, lane keeping, adaptive cruise, etc. All of them belong to higher-order image products, which are all based on the imaging system. A lot of "identification information" is added. We will explain them in detail later in the article. What are the mature car imaging products?
Reversing images at the beginning account for the first
There are very few things that can be said about the reversing radar, so we have to start with the reversing image. When it comes to reversing images, the first thing to say is the original reversing image system. It is very, very simple, that is, to place a small-sized camera in the middle of the rear of the car, while displaying it on the central control screen or in the side of the rear view mirror. Come out, this reversing image system can really help us to see the back of the car, but it still takes some time for the feeling of distance. This reversing image system is rarely seen now, even if it is a hundred-level system. A design that incorporates a guide line will also be used.
So what is the difficulty of joining the guide line? In fact, only need to add some modifications to the output can be achieved, only need to calculate the width of the body according to the angle of view of the lens and the position of the placement, you can give a good left and right tips. However, there is still a problem with this kind of prompt, that is, he can't link with the steering wheel, and can only play an excellent guiding role when going straight to the library.
At this point, we need our guide line to change direction with the steering wheel, but it is not easy to achieve this function. First, we need our car to have real-time detection capability in the direction of the steering wheel. Then we need a dedicated port to export this data to The reversing image system performs calculations before the guide line and the steering wheel are synchronized. Therefore, the reversing images we installed at present are generally not equipped with this function, and some cars can not be completely installed, which is no way.
Improve multiple perspectives easily
Ok, since we can join the camera by reversing, can we not join other angles? Naturally, the BYD S6 and the Accord 9th generation have similar designs. The driver can directly see the right front wheel position or the image on the right side in the car. If you happen to pass the strict width limit area, this set The system can show a very big advantage, allowing drivers to easily pass here.
Of course, some manufacturers think that since they can add one, plus two, then all add up, this is one of the more popular products - panoramic image system. The panoramic image system of different brands and different models is not the same (and the reversing images are basically the same). It can even be said that the concept is different. For example, the current panoramic image system of Mercedes-Benz, four cameras are located in the front center and the rear center. The lower part of the two exterior mirrors can be automatically combined into a complete image of the surrounding car. The essence is to simulate a 4-point omnidirectional ranging, which brings great convenience to parking.
There are also some off-road vehicles that have joined the panoramic imaging system, but for the sake of passing. Toyota Prado added blind area imaging system on the front wheel, 2 front side, 2 rear side, and rear part. When the road surface is uneven, you can observe very close front, very close side, etc., such as the front lens. Also added to the wheel direction simulation, this system will have a very large use if you happen to be on a road where the ups and downs are very obvious.
The revolution introduced infrared to watch the night
Then we will talk about the night vision system. The basis of the night vision system is the infrared imaging system. It may be that many people think that infrared imaging is more than the high end of the camera, but the sensing wavelength of modern sensors is very broad, infrared image. Sensors differ from visible light sensors in that only the front filter is different. According to the current industrial level, a device that can basically be night vision is made, and the cost is less than 1,000 yuan.
But why is the current night vision system of cars still rare? Apart from the law and related policy factors, night vision does not bring a good night vision. The fundamental reason is that even if it is infrared light, it is not enough at night. Therefore, car manufacturers often add infrared light to the front of the vehicle to supplement the infrared light to achieve better lighting effects. However, infrared lamps are not as cheap as infrared image sensors, which is the main cost of night vision systems.
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