From the halogen bulbs of tungsten filaments to xenon headlamps that emit light with inert gases to the LED (light-emitting diode) technology that has been popular in recent years, the evolution of single-source performance has not been able to meet the complex and varied road conditions and people's requirements for lighting performance. Therefore, a more intelligent and efficient AFS (Adaptive Front Lighting System) adaptive lighting system was born. This article refers to the address: http:// I believe that everyone has had such experience during night driving. Some cars will lift up when the heavy objects are loaded at the rear, which makes the lights shine very high. Even if the low beam is used, the people driving in front will be shaken. Dizzy, the AFS system with level adjustment can solve this problem by collecting the dynamic angle of the body to automatically adjust the vertical height of the light distribution. When the vehicle turns, the vehicle is deflected in a straight line, causing the vehicle to deviate from the trajectory and the direction of illumination in the curve. There is a blind spot on the inside of the curve, and this condition will continue until the straight line is resumed. Obstructions in the corners, the driver is likely to cause an accident because of the reaction. The AFS system with the follow-up steering function can adjust the illumination angle of the lamp according to the information provided by the sensor to eliminate the blind spot. When driving on a suburban road, due to insufficient lighting of the streetlight, the situation on both sides is often not seen when crossing the intersection, and the system can increase the illumination width as needed. When driving on a highway, higher speeds require wider and farther illumination than urban roads. AFS can adjust the headlight power and light distribution angle to make the driver's field of vision wider, which improves driving safety. In the smoggy weather, the front lighting line is diffused and the lampshade is covered with small water droplets, which reduces the brightness and penetrating power, which makes the front scene difficult to see, the driver's visibility is very low, and the traffic is greatly inconvenient. . The AFS is activated by the fog sensor sensing the size of the fog and the sensitivity of the photosensor to the light. AFS will increase the driving power of the headlamps and raise the vertical height of the headlights, and will also activate the lamp cleaning device to flush the small beads on the headlamps to enhance the brightness and penetration of the headlamp beam. , thereby improving the visibility and clarity of the road ahead. In rainy weather, the water on the ground will reflect the light hitting the ground on the ground to the opposite driver's eyes, making it dazzling. The data obtained by the rain sensor can determine whether it is raining or not, and can further know the amount of rainfall. AFS can appropriately reduce the height of the headlights and limit the illumination in this range to avoid the glare caused by the reflected glare to the driver in front of the vehicle. The electronic control unit transmits information such as steering angle, speed and ambient illumination to the central processing unit through the transmission line. After processing, the output execution signal is output, and the actuator controls the lighting control. The controller controls the light distribution combination to make the vehicle achieve the most reasonable allocation. Light distribution. Compared with traditional lights, drivers can get more road information in the dark, effectively improving the safety of driving at night. The AFS actuator consists of a series of motors and optical mechanisms. There are generally projection headlights, motors that adjust the vertical angle of the headlights, rotating motors that adjust the lateral angle of the headlights, movable gratings that adjust the basic light pattern, and additional lights such as corner lights. Wait. The more advanced AFS can also be combined with advanced electronic technologies such as night vision systems to expand the lighting performance and provide more humanized lighting effects for vehicles. In the future development, the AFS system not only analyzes and processes the current environmental conditions, but also provides GPS signals to provide changes in the road ahead, so that the AFS system has the ability to foresee, and the corresponding light distribution mode is also the development trend of the AFS system. But no matter how the technology advances, improving the safety of the vehicle at night is always the original intention of the AFS system.
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