Design Of A Voice Guided Ultrasonic Spectacle And Waist Belt With GPS For The Visually Impaired

摘要

The problems accompanied with blind mobility is enormous. This project presents an electronic mobility aid and portable tracking device for the blind. The system is made up of a network of ultrasonic sensors mounted on a belt worn at the waist. The sensors detect obstacles within 100cm of the subject in three directional sides (left, front and right) and provides an alerting speech message through a headset which informs the subject about obstacle information essential for easy navigation. This system is made up of PIC16F77A microcontroller based embedded system to process real time data collected by the network of ultrasonic sensors. It uses APR9600 flash memory to store relevant prerecorded speech messages which is used to alert the subject based on the direction and distance of the obstacle found in the path of the sensors. The speech messages are delivered to the subject through headphones. The system is incorporated with GPS NEO7M which provides data of the location of the subject. The data information is communicated to attendant of the blind through GSM SIM900. Thus, the attendant can access the data sent on google maps to know the exact location of the blind. The GPS and GMS are interfaced with ATMEGA328P microcontroller which works as the processor of the system.