Tactile display of softness on fingertip

Abstract Multi-sensory human–machine interfaces are currently challenged by the lack of effective, comfortable and affordable actuation technologies for wearable tactile displays of softness in virtual- or augmented-reality environments. They should provide fingertips with tactile feedback mimicking...

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Autores principales:	Gabriele Frediani, Federico Carpi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d2f598e2557c4ac4b82e23b6fcf568fe
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spelling	oai:doaj.org-article:d2f598e2557c4ac4b82e23b6fcf568fe2021-12-02T16:08:37ZTactile display of softness on fingertip10.1038/s41598-020-77591-02045-2322https://doaj.org/article/d2f598e2557c4ac4b82e23b6fcf568fe2020-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77591-0https://doaj.org/toc/2045-2322Abstract Multi-sensory human–machine interfaces are currently challenged by the lack of effective, comfortable and affordable actuation technologies for wearable tactile displays of softness in virtual- or augmented-reality environments. They should provide fingertips with tactile feedback mimicking the tactual feeling perceived while touching soft objects, for applications like virtual reality-based training, tele-rehabilitation, tele-manipulation, tele-presence, etc. Displaying a virtual softness on a fingertip requires the application of quasi-static (non-vibratory) forces via a deformable surface, to control both the contact area and the indentation depth of the skin. The state of the art does not offer wearable devices that can combine simple structure, low weight, low size and electrically safe operation. As a result, wearable softness displays are still missing for real-life uses. Here, we present a technology based on fingertip-mounted small deformable chambers, which weight about 3 g and are pneumatically driven by a compact and cost-effective unit. Weighting less than 400 g, the driving unit is easily portable and can be digitally controlled to stimulate up to three fingertips independently. Psychophysical tests proved ability to generate useful perceptions, with a Just Noticeable Difference characterised by a Weber constant of 0.15. The system was made of off-the-shelf materials and components, without any special manufacturing process, and is fully disclosed, providing schematics and lists of components. This was aimed at making it easily and freely usable, so as to turn tactile displays of softness on fingertips into a technology ‘at fingertips’.Gabriele FredianiFederico CarpiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-10 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gabriele Frediani Federico Carpi Tactile display of softness on fingertip
description	Abstract Multi-sensory human–machine interfaces are currently challenged by the lack of effective, comfortable and affordable actuation technologies for wearable tactile displays of softness in virtual- or augmented-reality environments. They should provide fingertips with tactile feedback mimicking the tactual feeling perceived while touching soft objects, for applications like virtual reality-based training, tele-rehabilitation, tele-manipulation, tele-presence, etc. Displaying a virtual softness on a fingertip requires the application of quasi-static (non-vibratory) forces via a deformable surface, to control both the contact area and the indentation depth of the skin. The state of the art does not offer wearable devices that can combine simple structure, low weight, low size and electrically safe operation. As a result, wearable softness displays are still missing for real-life uses. Here, we present a technology based on fingertip-mounted small deformable chambers, which weight about 3 g and are pneumatically driven by a compact and cost-effective unit. Weighting less than 400 g, the driving unit is easily portable and can be digitally controlled to stimulate up to three fingertips independently. Psychophysical tests proved ability to generate useful perceptions, with a Just Noticeable Difference characterised by a Weber constant of 0.15. The system was made of off-the-shelf materials and components, without any special manufacturing process, and is fully disclosed, providing schematics and lists of components. This was aimed at making it easily and freely usable, so as to turn tactile displays of softness on fingertips into a technology ‘at fingertips’.
format	article
author	Gabriele Frediani Federico Carpi
author_facet	Gabriele Frediani Federico Carpi
author_sort	Gabriele Frediani
title	Tactile display of softness on fingertip
title_short	Tactile display of softness on fingertip
title_full	Tactile display of softness on fingertip
title_fullStr	Tactile display of softness on fingertip
title_full_unstemmed	Tactile display of softness on fingertip
title_sort	tactile display of softness on fingertip
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/d2f598e2557c4ac4b82e23b6fcf568fe
work_keys_str_mv	AT gabrielefrediani tactiledisplayofsoftnessonfingertip AT federicocarpi tactiledisplayofsoftnessonfingertip
_version_	1718384498538708992

Tactile display of softness on fingertip

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