Visible Light Communications-Based Assistance System for the Blind and Visually Impaired: Design, Implementation, and...

Area of Science:

• Assistive technology
• Human-computer interaction
• Optical wireless communication

Background:

• Visual impairment significantly impacts quality of life and independence.
• Technological advancements offer potential solutions to mitigate challenges faced by visually impaired individuals.
• Existing assistive technologies may not always be discreet or seamlessly integrated into daily life.

Purpose of the Study:

• To propose and evaluate a novel wearable solution for personal assistance to visually impaired individuals.
• To leverage Visible Light Communications (VLC) technology for enhanced navigation and object detection.
• To develop a discreet assistive device integrated into a multi-functional smart backpack.

Main Methods:

• Development of a wearable prototype integrated into a smart backpack.
• Utilizing Visible Light Communications (VLC) for data transmission and localization.
• Experimental evaluation in a complex scenario involving object retrieval and navigation.
• Testing under varying light dimming conditions (1-99%).

Main Results:

• The prototype achieved a Bit-Error Rate (BER) below 10^-7.
• Effective support was provided within a 3-meter radius of a standard luminaire.
• The system maintained low BER performance with light dimming.
• Successful demonstration of information and guidance for navigation to unknown locations.

Conclusions:

• The proposed VLC-based smart backpack offers a viable and discreet solution for assisting visually impaired individuals.
• The technology significantly enhances personal assistance, enabling safer and more efficient travel.
• This work represents the first reported implementation and experimental evaluation of such a concept for the visually impaired.