Multi-Section Sensing and Vibrotactile Perception for Walking Guide of Visually Impaired Person.

Area of Science:

• Assistive Technology
• Human-Computer Interaction
• Robotics

Background:

• Visually-impaired individuals face mobility challenges.
• Existing Electronic Travel Aids (ETAs) often lack comprehensive features for reliable navigation.
• Developing ETAs requires balancing object detection, user feedback, and usability.

Purpose of the Study:

• To develop an easy-to-use Electronic Travel Aid (ETA) for the visually impaired.
• To integrate reliable object detection with effective tactile feedback.
• To enhance user safety and mobility in outdoor environments.

Main Methods:

• Utilized seven ultrasonic sensors for omnidirectional obstacle detection.
• Implemented a tactile display with vibrators for obstacle feedback.
• Integrated electromagnetic brakes for detecting and responding to ground drop-offs.
• Conducted outdoor walking tests with blind participants to evaluate feasibility and safety.

Main Results:

• The developed ETA demonstrated sufficient feasibility for outdoor use.
• Improvements are needed in sensor range for detecting overhead obstacles.
• User learning time is a factor for optimal ETA performance.
• A lightweight, low-cost version was developed, enhancing portability and usability.

Conclusions:

• The developed ETA shows promise in improving mobility for the visually impaired.
• Further research should focus on enhancing sensor capabilities and optimizing user adaptation.
• The improved design offers better portability and usability compared to previous models.