In order to realize different functions, AFS must obtain different vehicle driving information from different sensors. For example, in order to realize the function of corner lighting, in addition to obtaining the vehicle speed from the vehicle speed sensor, the steering wheel angle from the steering wheel angle sensor and the body inclination angle from the body height sensor, it is also necessary to obtain the information of the actual steering angle of the vehicle through some special sensors; In order to realize the function of lighting in rainy days, it is necessary to obtain the information of whether it rains from the humidity sensor. ...
Because in general, some information required by AFS is also adopted by other control systems, that is, AFS actually shares some sensors with other systems, so the sharing of these sensor information can only be realized after the transmission path of the bus.
The information received by AFS can be quantified except for a few pieces of information such as vehicle speed, body angle and body inclination, and most of the information sent back by other sensors can only be qualitative. For example, the environmental information outside the car body, such as uneven ground, heavy rain and so on, can not be accurately quantified. This enables the central processor of AFS to make fuzzy judgments. And a lot of information is interrelated. For example, in the case of water accumulation on the road in rainy days, the turning angle of vehicles is very different from that in sunny days ... The central processor of AFS not only makes fuzzy judgments, but also constantly fine-tunes the system parameters with the change of this environment, making AFS eventually become an adaptive fuzzy system.
The executive mechanism of AFS consists of a series of motors and optical mechanisms. Generally, there are projection headlamps, height adjustment motors for adjusting the vertical angle of headlamps, rotary motors for adjusting the horizontal angle of headlamps, movable gratings for adjusting basic lamp types, and some additional lamps such as corner lamps.
At present, many luxury cars, such as BMW5 series, Mercedes-Benz E-Class, Audi A8, Lexus R series and so on, have begun to install AFS system. Recently, it was reported that Toyota's MARK2, which was put into production in Tianjin, will also install AFS. What is dwarfed is that the research and development of AFS in China is still in its infancy, and I am afraid it will be in a very unfavorable position in this new wave of automobile lighting revolution!