Abstract: Car reversing aid is a kind of intelligent electronic guard systerm,which can detect the distance of the barrier beside or after the car when it is reversing and parking ,use audio warings to alert driver to keep distance from obstacles,and so that to make the drive safer.The thesis introduces an alarm system for backing cars and against knock,which uses 8051 Monolithic processor as control center. Furthermore,the thesis briefs the functions and features of 8051 single-chip microcomputer. the thesis also shows soft and hard ware design for measuring distance,giving alarm and against knock when backing cars.
Key words: Monolithic processor;supersonic wave;measure distance
