ULTRASONIC VISION SYSTEM

• Main Author: AHMED OBAID, KARSOU
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi Petronas 2011
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://utpedia.utp.edu.my/8774/1/2011%20-%20Ultrasonic%20vision%20system.pdf; http://utpedia.utp.edu.my/8774/

Visually impaired people face major problems in activities which require visual awareness such as: navigation, reading, sport, etc. This project attempts to contribute to the visually impaired community as well as to academia by developing low cost, easy to construct navigation tool which aids visually disabled to avoid objects while navigation. The proposed method utilizes EZl ultrasonic modules, PIC18F4550 microcontroller, and 6 Volts buzzer like alarm. For user convenience and comfort, the system is wholly implemented on an ice cap. A coherent development methodology was adopted to implement the proposed prototype by the use of potentiometers and an LCD during the early and mid phases of the project to emulate the ultrasonic modules and visually debug the intermediate processing results. The practicality and uniqueness ofthe implementation on an ice cap with the ease to wear feature shape the significance of our contribution. Remarkably, the prototype was tested in different scenarios and was able to detect objects up to 6.45 meters and send hearable distinct alarms at 2 meters and 0.5 meter far. By the use of the proposed prototype, visually impaired users can independently navigate while avoiding objects with two levels of alarm indication. In addition, the prototype is developed to be flexible in such way that it can be easily exploited for future extension and improvements for both hardware and software by utilizing the abundant resources of PIC18F4550 microcontroller and CCS C compiler library.