Highway Rear-end Collision Warning Systems Experimental Research

The accident of automobile rear-end collision has taken place frequently in recent years, and rear-end collision warning system has good use in improving expressway traffic safety, so the warning system has been paid more attention in the world.Base on the mathematic model of automobile safe following distance, the hardware and software of the system are built. The system adopts twice alarms, the first one is reminding alarm which uses light, and the latter is risk alarm which uses light and sound. The information collection sub-system is designed on the base of completed automobile network (CAN) . The sub-system collects and deals with the system sensors' information, at the same time communicates with other sub-systems on a real-time manner, so it guarantees the system's real-time and reliability. The data collection program of the system is made by language C, it calculates own vehicle's speed, and collects the information of steering, braking and accelerating pedal's position. The experiments are designed and on board experiments are carried out. The experiment results show that the system warnings are effective, and the system warning restraints are realized too.