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A Hand-Held Device Presenting Haptic Directional Cues for the Visually Impaired
Haptic information is essential in everyday activities, especially for visually impaired people in terms of real-world navigation. Since human haptic sensory processing is nonlinear, asymmetric vibrations have been widely studied to create a pulling sensation for the delivery of directional haptic c...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10611303/ https://www.ncbi.nlm.nih.gov/pubmed/37896508 http://dx.doi.org/10.3390/s23208415 |
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author | Dong, Shuhao Gallagher, Justin Jackson, Andrew Levesley, Martin |
author_facet | Dong, Shuhao Gallagher, Justin Jackson, Andrew Levesley, Martin |
author_sort | Dong, Shuhao |
collection | PubMed |
description | Haptic information is essential in everyday activities, especially for visually impaired people in terms of real-world navigation. Since human haptic sensory processing is nonlinear, asymmetric vibrations have been widely studied to create a pulling sensation for the delivery of directional haptic cues. However, the design of an input control signal that generates asymmetric vibrations has not yet been parameterised. In particular, it is unclear how to quantify the asymmetry of the output vibrations to create a better pulling sensation. To better understand the design of an input control signal that generates haptic directional cues, we evaluated the effect of the pulling sensations corresponding to the three adjustable parameters (i.e., delay time, ramp-down step length, and cut-off voltage) in a commonly applied step-ramp input signal. The results of a displacement measurement and a psychophysical experiment demonstrate that when the quantified asymmetry ratio is in a range of 0.3430–0.3508 with an optimised cut-off voltage for our hand-held device, the haptic directional cues are better perceived by participants. Additionally, the results also showed a superior performance in haptic delivery by shear forces than normal forces. |
format | Online Article Text |
id | pubmed-10611303 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-106113032023-10-28 A Hand-Held Device Presenting Haptic Directional Cues for the Visually Impaired Dong, Shuhao Gallagher, Justin Jackson, Andrew Levesley, Martin Sensors (Basel) Article Haptic information is essential in everyday activities, especially for visually impaired people in terms of real-world navigation. Since human haptic sensory processing is nonlinear, asymmetric vibrations have been widely studied to create a pulling sensation for the delivery of directional haptic cues. However, the design of an input control signal that generates asymmetric vibrations has not yet been parameterised. In particular, it is unclear how to quantify the asymmetry of the output vibrations to create a better pulling sensation. To better understand the design of an input control signal that generates haptic directional cues, we evaluated the effect of the pulling sensations corresponding to the three adjustable parameters (i.e., delay time, ramp-down step length, and cut-off voltage) in a commonly applied step-ramp input signal. The results of a displacement measurement and a psychophysical experiment demonstrate that when the quantified asymmetry ratio is in a range of 0.3430–0.3508 with an optimised cut-off voltage for our hand-held device, the haptic directional cues are better perceived by participants. Additionally, the results also showed a superior performance in haptic delivery by shear forces than normal forces. MDPI 2023-10-12 /pmc/articles/PMC10611303/ /pubmed/37896508 http://dx.doi.org/10.3390/s23208415 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Dong, Shuhao Gallagher, Justin Jackson, Andrew Levesley, Martin A Hand-Held Device Presenting Haptic Directional Cues for the Visually Impaired |
title | A Hand-Held Device Presenting Haptic Directional Cues for the Visually Impaired |
title_full | A Hand-Held Device Presenting Haptic Directional Cues for the Visually Impaired |
title_fullStr | A Hand-Held Device Presenting Haptic Directional Cues for the Visually Impaired |
title_full_unstemmed | A Hand-Held Device Presenting Haptic Directional Cues for the Visually Impaired |
title_short | A Hand-Held Device Presenting Haptic Directional Cues for the Visually Impaired |
title_sort | hand-held device presenting haptic directional cues for the visually impaired |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10611303/ https://www.ncbi.nlm.nih.gov/pubmed/37896508 http://dx.doi.org/10.3390/s23208415 |
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