What is the forward driving assist camera system that assists driving?
When it comes to the camera used in the car, the first reaction may be to use the camera for reversing images, because it should be the earliest camera applied to the car. With the development of the car in recent years, the car camera can be described as an endless stream of applications, such as driving recorders (for anti-collision porcelain), lane change assistance (to make up the rearview mirror blind zone), parking Auxiliary (full car look around) and so on. For so many cameras, Xiaobian simply divides its perspective into four parts: front view, rear view, surround view, and in-vehicle surveillance.
Forward driving assistance is an important part of advanced driving assistance ADAS, which generally includes automatic emergency brake AEB, lane departure warning LDW, lane keeping auxiliary LKA, traffic sign recognition TSR, high beam auxiliary HBA, adaptive cruise ACC, etc. In fact, for the forward driving assistance, the internationally renowned testing institutions have also developed relevant testing and evaluation rules. AEB City like urban working conditions and AEB inter-Urban in suburban conditions have been explicitly included in the 2014 European new car. Evaluate the rating of E-NCAP. I have to admit that the car is moving in the direction of autonomous driving. So, what role does the camera play in the forward driving assistance system? Please follow the small series of ideas to look at the top of the windshield in front of the car. For convenience, the camera for forward driving assistance is hereinafter referred to simply as the front camera.
The main purpose of the front camera is to see information such as pedestrians on the road ahead. They all say that they stand tall and look far, but the reason for the high position of the front camera is to ensure that it is as close as possible (because the front hood will cause blind spots). Of course, the position is too high or too low is not enough, suitable for the car is the most important. It was too high, and suddenly the bird fell on the windshield to block the camera. If the wiper could not be cleaned up, it would be a scorpion. . .
The front camera system generally has two types: one-eyed dragon and two eye-shaped (bionic design). One-eyed dragon type, only one camera, the whole module has small lateral volume, small internal calculation, low cost, and obvious disadvantages: for the unclear distance, you can try to close one eye, then take the needle through the root line to ensure better than two Only one eye is wearing it slowly, and the monocular operation is likely to happen when the line can never be worn. . . The two eye types are more accurate for distance judgment (previous operation has been confirmed). Since a certain distance is required between the two cameras, there is a problem that the lateral volume is large, the integrated operation of the two images is complicated, and the cost is high.
The Cyclops can be said to be the best solution for some functions that do not require precise distance information. Therefore, the Cyclops have reasons for her existence. Please don't laugh at her with both eyes.
Function introduction: The front camera can realize full function when the light is in good environment.The functions that the front camera can achieve must first have a premise, sufficient light, and good weather, because the light is dark and the bad weather such as heavy rain, haze, heavy snow will greatly reduce the system performance. With the big premise, we will officially introduce the functions that the front camera can achieve.
VO_ACC: Adaptive Cruise Control ACC is developed on the basis of the traditional cruise control CC. Its advanced nature is that it can detect the distance between the car and the front car through the sensor, and then set the maximum. Cruise at a speed of between the speed and the distance between the two cars. What needs to be emphasized here is that VO_ACC is not a traditional ACC realized by millimeter wave radar, but relies solely on the front camera to achieve this function alone, which is referred to as visual adaptive cruise VO_ACC. At present, BMW i3's front camera (one-eyed dragon) and Subaru Outo's front camera (two-eye) have taken the lead in adopting this technology. The cores are Israel Mobileye's EyeQ2 chip and Japan's Hitachi's binocular stereo camera technology. .
