The evolutionary history of solving car blind spots with interesting knowledge

The evolutionary history of solving car blind spots with interesting knowledge

The first stage of blind area solution-"mirror"

In addition to the rearview mirrors on both sides and in the car, there are three kinds of rearview mirrors that novice drivers often don't understand.

1, mirroring

2. Sand mirror

3. Eyes

Rear view mirrors are more common in older SUVs, MPVs, light buses and other models. These models belong to vans, and the tailgate and rear window are almost vertical. You can observe the rear gear through the rearview mirror, so you can see the blind area of the rearview mirror by installing an observation mirror facing the ground in the rear gear.

This kind of mirror will have some tilt, and you can see it through the rearview mirror or twist your head. The mirror will use a lens with large curvature, and the reflected image will be distorted, but the road condition can still be judged. Only such a mirror can't be used in the car, so "eye observation" is still very important.

It is not difficult to judge the blind spot at the rear of the car. Before reversing, always go forward a certain distance. During this process, you can observe the road conditions at the expected reversing position. Then judge whether the reversing position has changed through the rearview mirror, which is the only way to judge the old car reversing.

At present, there are still trucks using front mirrors, which are generally located in the upper right corner of the front or above the co-pilot door; It is used to observe the blind spots in front of the car and the right front side. When reversing on the left front side, you only need to stick your head out to have a look.

Sand mirror is also widely used. The front of the truck will be found, as will the early SUVs and off-road vehicles, including some imported MPVs with high reputation, which have been used to this day. The installation position of the sand mirror is mainly on both sides of the front of the car. The lens is small in size but large in curvature, and the center point is opposite to the diagonal position of the hood, that is, oblique tone.

The blind areas of the front fender and the front fender will be mapped on both sides of the sand mirror, which is the most easily overlooked blind area; Therefore, sand mirror is actually very important. In the early days, the rearview mirrors of many vehicles were also installed in this position, in order to solve the blind spot of the front of both sides. However, if the location is too far away, the driver's vision is highly required, and the efficiency of observing the rearview mirror and judging the road conditions will be affected; Therefore, in the later period, the rearview mirror is placed at the door position, and the vehicle can only install the sand mirror by itself.

However, this design has another advantage, that is, it is convenient to manually adjust the angle of the rearview mirror, and it is convenient to adjust the angle to observe the low blind spot of the rear fender at the B/C position when reversing; Then the ideal combination should be the rearview mirror with the door position and the front sand mirror, but this design will feel a bit strange.

The second stage of blind area solution-"camera"

The reversing image is the earliest intelligent configuration used to replace the ground mirror, inspired by "closed circuit television", which is also called "monitoring system"; A video recording system with a monitor is installed in the center console, and a camera is installed at the rear of the car. The switch of the system is linked with the reverse gear, and the scene of the rear of the car can be seen through the display screen when the reverse gear is linked. This is easier to observe than the rearview mirror, and the visual range is wider, especially in rainy days. Therefore, the reversing image system became popular all over the world as soon as it was installed, and with the reversing radar, the "sound and picture synchronous reminder" was realized, and the blind spot at the rear of the car was no longer a problem.

As for the original cars, there are fewer and fewer vehicles without reversing rearview system. At present, vehicles with a grade of ≥ 50,000 are basically equipped; If the original car doesn't have it, you can add it later. There are various types, and avoiding advertising suspicion is not discussed here.

Panoramic image solves the blind spot problem of the front and fenders on both sides of the front! Since the camera can be installed at the rear of the car, the position of the front and rear view mirror can of course be installed; Panoramic images collect information from various angles through multiple cameras around the car body, and then assemble into a "bird's eye view" through the system to make obstacles clearly visible; Moreover, the high-standard panoramic image has no dead angle, and the front and rear cameras can be installed in the rearview mirror position. If the driving skills are not skilled enough, there will be no holes in the observation image.

At the same time, some vehicles also have the program of "rearview mirror automatically reversing". The rearview mirror will turn down when it is in reverse gear, and the illumination angle is the blind spot of the rear wheel. With such a system, we can really be blind.

However, why don't trucks install this system?

This problem is a concern of many car enthusiasts. The containers of some container trucks are too wide, and there is a big blind spot in the front rearview mirror. If the panoramic image is installed, many traffic accidents can be avoided, but the cost of the panoramic image system is still relatively high. The camera type used for freight cars is quite special, and the wire harness consumption is also relatively large. Installing this system is bound to increase the price of vehicles, so car companies generally do not regard this system as the standard for trucks.

Secondly, some tractors are troublesome to tow, and in extreme cases, it is easy to damage the harness, and the design cost and car use cost may be higher; It is only possible for trucks to pass the national standards for safe operation of motor vehicles, otherwise there will still be a large number of trucks that can only rely on various reflectors.

How to solve the blind spots on both sides of the front when driving?

The blind spot problem of reversing has been overcome, and the biggest problem now is the blind spot problem caused by A-pillar occlusion. There is really no good solution to this problem. It is unrealistic to build transparent A-pillar with transparent materials. There are only two correct solutions.

1, camera screen

2. Subsequent panoramic image activation

A-pillar made of transparent material is difficult to ensure structural strength, and it will also make the vehicle look strange; By installing a camera outside the A-pillar and a display inside the A-pillar, the flexible display screen around the A-pillar can display the external scene as long as the turn signal is turned on when turning, realizing the combination of "real scene+display scene" and realizing the transparency of the A-pillar.

But such a system will only make the cost higher, and the price of smart devices using flexible displays is still exaggerated. It is difficult to control the cost of wrapping a huge A-pillar. So this method is feasible, but it has not reached the node that can be popularized, so the available methods at this stage can only rely on panoramic images.

Some vehicle panoramic images can only be turned on when reversing, but some vehicle panoramic images and associated turn signals; For example, when there are road signs or obstacles in the blind area collected by the camera, turning on the turn signal will open the panoramic image, or turning on and off the turn signal twice can also be forced to turn on. After turning, the turn signal will automatically turn off and the image will also turn off. When driving, if you feel blind spots on the A-pillars on both sides, you can identify them through panoramic images. The system will feel awkward at the beginning of use, but you can still ensure driving safety when you get used to it.

At this point, the problem of driving blind zone has also been solved. The next step may be to wrap the A-pillar with a flexible display screen to realize driving without blind zone. However, the awareness of safe driving is still the most important. Learn to "predict your prediction" when driving, and have the ability to judge the intentions of vehicles and pedestrians who may be close to the blind area, otherwise there will still be a probability of collision.