Ultrasonic Smart Spectacles for Visually Impaired and Blind People

Visually impaired and blind people require constant assistance from others in order to move around, making them extremely depend on others in their social lives. For visually impaired and blind people, object detection and distance calculation are major challenges. Earlier navigation systems were both costly and time-consuming to use in everyday life. This study describes a blind or visually impaired person's electronic navigation system (subject). Using an ultrasonic sensor network, this system detects objects upto 500cm to the left and right of the subject(person). It effectively measures the distance between the person and the detected obstacle(object) and provides a navigation route that avoids obstacle. It employs speech feedback to inform the user of the location and distance of the indicated obstacle. Using an ARM LPC2148 microcontroller-based embedded system, this recommended system handles real-time data acquired by an ultrasonic sensing networks. Based on the directions and distances of the observed barrier, the applicable pre-recorded spoken communications stored in the APR33A3 are called as flash memory. Speaker is used to provide such voice messages to the subject. The project's objective is to equip visually impaired and blind persons with a more cost-effective and portable navigation system.