ontheweg
What can the car offer us is not just convenient, but also high-speed passion or something like these feelings. While the car users always focus on the safety of driving, nobody wants to pay their lifes to enjoy the feeling. So the automakers make the great efforts to satisfy customers. As mentioned in the last article, the so-called car assistance system appears for this reason. Today I'd like to introduce one of the example applications about ADAS, which is able to increase the driving safety -- adaptive highbeam assist.
So far I have found, it is only applied by Mercedes-Benz, one of the newest product of which to make the nighttime driving safer. One main function of such a system is to avoid the "blind effect" because of other vehicles strong headlamp lighting at night. As known by everyone, it can lead to an accident quite easily. According to the announcement from Mercedes: unlike traditional systems that simply switch between dipped and main beams, which is logically stiff, this new system is completely adaptive, adjusting light yield in accordance with prevailing traffic situations. And on their official web site , they have offered some test data about the dipped beam range, and the increasement of pedestrian dummies position distance.
With their official description, the working principle of this system is based on a camera positioned on the front windscreen, which is able the monitor the traffics in front of the car, meanwhile calculating the distances between the own car and other traffics, that is done every 40 ms. And dependent on this distance the system will decide how strong will set the lighting and continually adapt it. So there are two relevant components of this system: a mini camera positioned behind the rearview mirror on the windscreen and towards forward; and logically an adaptive headlamp which is able to receive the data from camera. And in my opinion, the technique of the camera tracking and traffic positioning is a significant and dominant part. In some other ADAS applications, this technique is also required. Another carmaker BMW has also developed a similar headlamp controlling system, but not so adaptive as Mercedes. But I still have two questions about two special situations: one is under the high speed driving scenario, particularly both cars are fast, could the reaction of this system be still acceptable with just 40 ms/sig; the other worry is in the curve road under which the traffic situation suddenly changed unpredictablly, how can this system work well.
Anyway this is still a pretty cool application and also very practical. I have found a nice magazine about it and a very cool video, enjoy them!!
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