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Title: A necklace sonar with adjustable scope range for assisting the visually impaired
Authors: Villamizar, Luz H.
Gualdrón, Mauricio
González, Fabio
Aceros, Juan
Rizzo Sierra, Carlos V.
Keywords: Sonar
Tactile sensors
Educational institutions
Issue Date: 2013
Series/Report no.: Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS;Art. no. 6609784, pp. 1450-1453. 2013
Abstract: A sonar based device with tactile feedback was developed to improve the mobility and independence of visually impaired individuals. It features a transceiver/receiver, a potentiometer, a microcontroller, a rechargeable polymer lithium ion battery, and a Nokia Cell phone vibrator. All components are commercially available and housed in a custom acrylic package with 86 mm × 34 mm × 12 mm in dimension, and 120 grms in weight. Additionally, the device features an adjustable detection scheme for user customization of distance range, and a tactile feedback system that avoids interference with auditory sensory information. The device was tested for its navigational efficacy in an artificial indoor environment, and in a live outdoor setting. Ten subjects (9 males and 1 female), with a mean age of 35 years-old (range: 17 to 52) were presented with a series of navigational tasks resulting in considerable reduction of head, shoulder, chest, and arms collisions during their locomotion. We conclude that this device greatly improves the mobility and safety of visually impaired individuals.
ISBN: 978-1-4577-0216-7
ISSN: 1558-4615
Appears in Collections:DEABL. Circulación de conocimiento especializado

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