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E-Skin Bimodal Sensors for Robotics and Prosthesis Using PDMS Molds Engraved by Laser †

Electronic skin (e-skin) is pursued as a key component in robotics and prosthesis to confer them sensing properties that mimic human skin. For pressure monitoring, a great emphasis on piezoresistive sensors was registered due to the simplicity of sensor design and readout mechanism. For higher sensi...

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Autores principales: dos Santos, Andreia, Pinela, Nuno, Alves, Pedro, Santos, Rodrigo, Farinha, Ricardo, Fortunato, Elvira, Martins, Rodrigo, Águas, Hugo, Igreja, Rui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6412975/
https://www.ncbi.nlm.nih.gov/pubmed/30795531
http://dx.doi.org/10.3390/s19040899
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author dos Santos, Andreia
Pinela, Nuno
Alves, Pedro
Santos, Rodrigo
Farinha, Ricardo
Fortunato, Elvira
Martins, Rodrigo
Águas, Hugo
Igreja, Rui
author_facet dos Santos, Andreia
Pinela, Nuno
Alves, Pedro
Santos, Rodrigo
Farinha, Ricardo
Fortunato, Elvira
Martins, Rodrigo
Águas, Hugo
Igreja, Rui
author_sort dos Santos, Andreia
collection PubMed
description Electronic skin (e-skin) is pursued as a key component in robotics and prosthesis to confer them sensing properties that mimic human skin. For pressure monitoring, a great emphasis on piezoresistive sensors was registered due to the simplicity of sensor design and readout mechanism. For higher sensitivity, films composing these sensors may be micro-structured, usually by expensive photolithography techniques or low-cost and low-customizable molds. Sensors commonly present different sensitivities in different pressure ranges, which should be avoided in robotics and prosthesis applications. The combination of pressure sensing and temperature is also relevant for the field and has room for improvement. This work proposes an alternative approach for film micro-structuration based on the production of highly customizable and low-cost molds through laser engraving. These bimodal e-skin piezoresistive and temperature sensors could achieve a stable sensitivity of −6.4 × 10(−3) kPa(−1) from 1.6 kPa to 100 kPa, with a very robust and reproducible performance over 27,500 cycles of objects grasping and releasing and an exceptionally high temperature coefficient of resistance (TCR) of 8.3%/°C. These results point toward the versatility and high benefit/cost ratio of the laser engraving technique to produce sensors with a suitable performance for robotics and functional prosthesis.
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spelling pubmed-64129752019-04-03 E-Skin Bimodal Sensors for Robotics and Prosthesis Using PDMS Molds Engraved by Laser † dos Santos, Andreia Pinela, Nuno Alves, Pedro Santos, Rodrigo Farinha, Ricardo Fortunato, Elvira Martins, Rodrigo Águas, Hugo Igreja, Rui Sensors (Basel) Article Electronic skin (e-skin) is pursued as a key component in robotics and prosthesis to confer them sensing properties that mimic human skin. For pressure monitoring, a great emphasis on piezoresistive sensors was registered due to the simplicity of sensor design and readout mechanism. For higher sensitivity, films composing these sensors may be micro-structured, usually by expensive photolithography techniques or low-cost and low-customizable molds. Sensors commonly present different sensitivities in different pressure ranges, which should be avoided in robotics and prosthesis applications. The combination of pressure sensing and temperature is also relevant for the field and has room for improvement. This work proposes an alternative approach for film micro-structuration based on the production of highly customizable and low-cost molds through laser engraving. These bimodal e-skin piezoresistive and temperature sensors could achieve a stable sensitivity of −6.4 × 10(−3) kPa(−1) from 1.6 kPa to 100 kPa, with a very robust and reproducible performance over 27,500 cycles of objects grasping and releasing and an exceptionally high temperature coefficient of resistance (TCR) of 8.3%/°C. These results point toward the versatility and high benefit/cost ratio of the laser engraving technique to produce sensors with a suitable performance for robotics and functional prosthesis. MDPI 2019-02-21 /pmc/articles/PMC6412975/ /pubmed/30795531 http://dx.doi.org/10.3390/s19040899 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
dos Santos, Andreia
Pinela, Nuno
Alves, Pedro
Santos, Rodrigo
Farinha, Ricardo
Fortunato, Elvira
Martins, Rodrigo
Águas, Hugo
Igreja, Rui
E-Skin Bimodal Sensors for Robotics and Prosthesis Using PDMS Molds Engraved by Laser †
title E-Skin Bimodal Sensors for Robotics and Prosthesis Using PDMS Molds Engraved by Laser †
title_full E-Skin Bimodal Sensors for Robotics and Prosthesis Using PDMS Molds Engraved by Laser †
title_fullStr E-Skin Bimodal Sensors for Robotics and Prosthesis Using PDMS Molds Engraved by Laser †
title_full_unstemmed E-Skin Bimodal Sensors for Robotics and Prosthesis Using PDMS Molds Engraved by Laser †
title_short E-Skin Bimodal Sensors for Robotics and Prosthesis Using PDMS Molds Engraved by Laser †
title_sort e-skin bimodal sensors for robotics and prosthesis using pdms molds engraved by laser †
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6412975/
https://www.ncbi.nlm.nih.gov/pubmed/30795531
http://dx.doi.org/10.3390/s19040899
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