基于单片机的盲人避障装置的设计

In view of the problem that the blind cannot understand whether there are obstacles in front during walking, a new obstacle-avoidance device was designed, which is based on single-chip. In addition, it has the function of voice-reminding. It detects whether there exist obstacles within a distance in front by means of ultrasonic-sending and ultrasonic-receiving. If having, voice-reminding module will issue information to remind the blind. On the basis of the principle of ultrasonic distance measurement, this design added the comparison circuit to ascertain the existence of obstruction in the target range. In the paper, relevant hardware circuit diagram and program flow chart are introduced in detail. This device is simple, utility and portable. To a large extent, it solved the security problems during the blind`s walking, which is of practical significance.