To prevent collision with the object in front of the car

so that the car is always in a safe driving speeds and reduce accidents

an automobile’s vertical anti-collision warning system is designed based on the AT89S52 technology.When in emergency situations that the distance is less than a safe distance.The system can give alarm and remind drivers to pay attention and slow down or apply the brake

so as to effectivly prevent rear-end collision accident and improve the car’s active safety performance.To test the system’s function and performance and optimal design scheme

a set of simulation program was designed

the result indicated that it can achieve different ways of warning

when inputting datas of warning distance and braking distance.