Microcontroller-Based Alarmed Ambulatory stick For The Vision Impaired

摘要

No Light Perception (NLP) in subjects has been clinically certified as a complete lack of form and visual light perception while having only light perception is the ability to articulate light and general direction of its source from the dark. Subjects with severe visual impairments are always in danger of independent mobility. Microcontroller-based alarmed ambulatory stick for the vision-impaired in this paper aimed to design a microcontroller based ambulatory stick with an alarm system to allow the vision impaired subjects’ mobility with no assistance. It is purely a simple mechanical device designed to detect static obstacles on the ground which also includes uneven surfaces, holes and steps. AT89S52 microcontroller was used to implement the entire activities of the system. Proteus 8.0 software was used to simulate the system model while PM-51 Macro Assembler and Top win version 6 Software and programmer were used for program development. This system can detect an obstructive object from a distance of one meter and beep an alarm to alert the subject to move to an alternative suitable route. The prototype has been effectively prove n to allow the visual impaired subjects move dependently.