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Sensors 2016, 16(7), 1070; doi:10.3390/s16071070

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

1
Center for Healthcare Technology Development, Chonbuk National University, Jeonju 54896, Korea
2
Department of Aerospace Engineering, Chonbuk National University, Jeonju 54896, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Octavian Adrian Postolache, Alex Casson and Subhas Mukhopadhyay
Received: 27 April 2016 / Revised: 24 June 2016 / Accepted: 6 July 2016 / Published: 12 July 2016
(This article belongs to the Special Issue Sensing Technology for Healthcare System)
View Full-Text   |   Download PDF [8991 KB, uploaded 12 July 2016]   |  

Abstract

Electronic Travel Aids (ETAs) improve the mobility of visually-impaired persons, but it is not easy to develop an ETA satisfying all the factors needed for reliable object detection, effective notification, and actual usability. In this study, the authors developed an easy-to-use ETA having the function of reliable object detection and its successful feedback to the user by tactile stimulation. Seven ultrasonic sensors facing in different directions detect obstacles in the walking path, while vibrators in the tactile display stimulate the hand according to the distribution of obstacles. The detection of ground drop-offs activates the electromagnetic brakes linked to the rear wheels. To verify the feasibility of the developed ETA in the outdoor environment, walking tests by blind participants were performed, and the evaluation of safety to ground drop-offs was carried out. From the experiment, the feasibility of the developed ETA was shown to be sufficient if the sensor ranges for hanging obstacle detection is improved and learning time is provided for the ETA. Finally, the light-weight and low cost ETA designed and assembled based on the evaluation of the developed ETA is introduced to show the improvement of portability and usability, and is compared with the previously developed ETAs. View Full-Text
Keywords: Electronic Travel Aid; obstacle detection; vibrotactile; tactile display; visually-impaired Electronic Travel Aid; obstacle detection; vibrotactile; tactile display; visually-impaired
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jeong, G.-Y.; Yu, K.-H. Multi-Section Sensing and Vibrotactile Perception for Walking Guide of Visually Impaired Person. Sensors 2016, 16, 1070.

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