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Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics
Biomimetic flexible tactile sensors endow prosthetics with the ability to manipulate objects, similar to human hands. However, it is still a great challenge to selectively respond to static and sliding friction forces, which is crucial tactile information relevant to the perception of weight and sli...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
AAAS
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7521026/ https://www.ncbi.nlm.nih.gov/pubmed/33029592 http://dx.doi.org/10.34133/2020/8910692 |
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author | Li, Yue Cao, Zhiguang Li, Tie Sun, Fuqin Bai, Yuanyuan Lu, Qifeng Wang, Shuqi Yang, Xianqing Hao, Manzhao Lan, Ning Zhang, Ting |
author_facet | Li, Yue Cao, Zhiguang Li, Tie Sun, Fuqin Bai, Yuanyuan Lu, Qifeng Wang, Shuqi Yang, Xianqing Hao, Manzhao Lan, Ning Zhang, Ting |
author_sort | Li, Yue |
collection | PubMed |
description | Biomimetic flexible tactile sensors endow prosthetics with the ability to manipulate objects, similar to human hands. However, it is still a great challenge to selectively respond to static and sliding friction forces, which is crucial tactile information relevant to the perception of weight and slippage during grasps. Here, inspired by the structure of fingerprints and the selective response of Ruffini endings to friction forces, we developed a biomimetic flexible capacitive sensor to selectively detect static and sliding friction forces. The sensor is designed as a novel plane-parallel capacitor, in which silver nanowire–3D polydimethylsiloxane (PDMS) electrodes are placed in a spiral configuration and set perpendicular to the substrate. Silver nanowires are uniformly distributed on the surfaces of 3D polydimethylsiloxane microcolumns, and silicon rubber (Ecoflex®) acts as the dielectric material. The capacitance of the sensor remains nearly constant under different applied normal forces but increases with the static friction force and decreases when sliding occurs. Furthermore, aiming at the slippage perception of neuroprosthetics, a custom-designed signal encoding circuit was designed to transform the capacitance signal into a bionic pulsed signal modulated by the applied sliding friction force. Test results demonstrate the great potential of the novel biomimetic flexible sensors with directional and dynamic sensitivity of haptic force for smart neuroprosthetics. |
format | Online Article Text |
id | pubmed-7521026 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | AAAS |
record_format | MEDLINE/PubMed |
spelling | pubmed-75210262020-10-06 Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics Li, Yue Cao, Zhiguang Li, Tie Sun, Fuqin Bai, Yuanyuan Lu, Qifeng Wang, Shuqi Yang, Xianqing Hao, Manzhao Lan, Ning Zhang, Ting Research (Wash D C) Research Article Biomimetic flexible tactile sensors endow prosthetics with the ability to manipulate objects, similar to human hands. However, it is still a great challenge to selectively respond to static and sliding friction forces, which is crucial tactile information relevant to the perception of weight and slippage during grasps. Here, inspired by the structure of fingerprints and the selective response of Ruffini endings to friction forces, we developed a biomimetic flexible capacitive sensor to selectively detect static and sliding friction forces. The sensor is designed as a novel plane-parallel capacitor, in which silver nanowire–3D polydimethylsiloxane (PDMS) electrodes are placed in a spiral configuration and set perpendicular to the substrate. Silver nanowires are uniformly distributed on the surfaces of 3D polydimethylsiloxane microcolumns, and silicon rubber (Ecoflex®) acts as the dielectric material. The capacitance of the sensor remains nearly constant under different applied normal forces but increases with the static friction force and decreases when sliding occurs. Furthermore, aiming at the slippage perception of neuroprosthetics, a custom-designed signal encoding circuit was designed to transform the capacitance signal into a bionic pulsed signal modulated by the applied sliding friction force. Test results demonstrate the great potential of the novel biomimetic flexible sensors with directional and dynamic sensitivity of haptic force for smart neuroprosthetics. AAAS 2020-08-24 /pmc/articles/PMC7521026/ /pubmed/33029592 http://dx.doi.org/10.34133/2020/8910692 Text en Copyright © 2020 Yue Li et al. http://creativecommons.org/licenses/by/4.0/ Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0). |
spellingShingle | Research Article Li, Yue Cao, Zhiguang Li, Tie Sun, Fuqin Bai, Yuanyuan Lu, Qifeng Wang, Shuqi Yang, Xianqing Hao, Manzhao Lan, Ning Zhang, Ting Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics |
title | Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics |
title_full | Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics |
title_fullStr | Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics |
title_full_unstemmed | Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics |
title_short | Highly Selective Biomimetic Flexible Tactile Sensor for Neuroprosthetics |
title_sort | highly selective biomimetic flexible tactile sensor for neuroprosthetics |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7521026/ https://www.ncbi.nlm.nih.gov/pubmed/33029592 http://dx.doi.org/10.34133/2020/8910692 |
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