This mini-car can run on the designed route all by itself ,when car reach the destination stopping 10s at there ,then go back and stop at the beginning line . the mini-car also can display time journey . base on the
micro-controller AT89C52.the mini-car can race intellectually. The system adopts photo electronic sensors to detecting the black line and control the direction then adds or reduces the speed of mini-car by PWM at once. By introducing the HALL speed sensor, the car can measure the distance accurately while running at different speed. To the display distance and time, it adopts a 8-bit LED. The car has only one key to start it, which make it feel more useful. The design of software adopts modularized designing method, and has a special characteristic, the display course constitute delay course, which strengthens display effect. Because this design applied modularized designing method, it has upgrade and extensible capability.
Keywords: Automatic control system , Photo electronic sensor ,
HALL speed sensor , 8-bit LED ,
Modularized designing method