Obstacle detection for Visually impaired and Blind person

Obstacle detection for Visually impaired and Blind person

 

                 Abstract:

            This paper presents an electronic navigation system for visually impaired and      blind people (subject). This system understands obstacles around the subject up
to 500 cm in front, left and right direction using a network of ultrasonic sensors. It effectively calculates distance of the  detected  object   from  the  subject  and  prepares navigation  path  accordingly  avoiding  obstacles.  It uses speech feedback to aware the subject about the detected obstacle and its distance. This  proposed  system  uses ARM LPC2148  microcontroller  based  embedded  system to process  real  time  data  collected  using  ultrasonic  sensor  network.  Based on direction and distance of detected obstacle, relevant pre-recorded speech message stored in APR9600 flash memory is invoked. Such speech messages are conveyed to the subject   using earphone.

Keywords:Electronic Travel Aid; Visual Impairment; Navigation Aid; Mobility; Ultrasonic spectacles; Blind navigation;