Apply On Ultrasonic Ranging Smart Guide The Blind Instrument

The blind people live in a dark world, to the daily study, work, life and social activities has caused great difficulties. How to safely walk, are blind in the life the biggest problem. According to this problem, this paper introduces a design based on AT89s52single chip ultrasonic ranging intelligent guide blind system, and the device with sound and vibration remind function, it has low cost, practical and accurate features. This system through the ultrasonic send receive to detect all directions around a range have obstacles exist, if present obstacles, voice and vibration remind module issued remind information, and at the same time, photosensitive diode technology effectively reminded passers-by to blind avoid. This paper is based on single-chip microcomputer control ultrasonic distance measurement based on the principle of, to determine a goal within the scope of the existence of obstacles, and at the same time using DS18B20temperature sensor to achieve circuit of temperature compensation, thus for the whole system anti-interference ability has improved tremendously, relevant parts with hardware circuit diagram, program flow chart and so on, this device is simple, practical and portable, design has been solved to a large extent the blind walk of security problems, has the practical significance.