基于激光测距的汽车防追尾报警系统设计

gainst the frequency of rear-end collision in the freeway, a suite of Vehicle Rear-end Collision Warning System Based on Distance Laser Sensor is designed in order to strive for more time for drivers, and reduce rear-end collision. Based on the model of minimum safe distance between cars, the design blueprint of system is presented in the text. Using the HALL vehicle speed sensor to measure the speed of own vehicle and distance laser to measure the distance of own vehicle to frontal vehicle and relative velocity, and analyzing and calculating information by AT89C51 which is the control core of the system. When the following distance is less than the minimum safety distance, the alarming unit reminds drivers to take corresponding measures by alarm signal. The research production of this design has an effective solving approach for decreasing the occurring of rear-end collision accidents on freeways.