Wearable Urban Mobility Assistive Device for Visually Impaired Pedestrians Using a Smartphone and a Tactile-Foot...

Area of Science:

• Assistive Technology
• Human-Computer Interaction
• Mobility Aids

Background:

• Blind and visually impaired individuals face challenges in independent outdoor navigation.
• Existing assistive technologies often have limitations in providing real-time, intuitive guidance.

Purpose of the Study:

• To report on the development and performance of a wearable assistive technology (AT) device.
• To enhance the independent, safe, and efficient mobility of blind and visually impaired pedestrians in urban settings.

Main Methods:

• Utilized smartphone positioning and computing for user location and guidance.
• Encoded navigation instructions as vibrating patterns.
• Implemented a foot-placed tactile interface for feedback delivery.
• Conducted two user experiments with sighted and visually impaired participants.

Main Results:

• Sighted subjects achieved over 93% recognition rates for the tactile feedback.
• Visually impaired subjects successfully navigated to target destinations in urban environments.
• The AT device concept was perceived as useful, friendly, fast to master, and easy to use.

Conclusions:

• The developed wearable AT device shows promise for improving outdoor mobility for blind pedestrians.
• The foot-placed tactile interface effectively conveys navigation information.
• The AT device concept is a viable and user-friendly approach for enhancing independence.