E-skin bimodal sensors for robotics and prosthesis using PDMS molds engraved by laser
dos Santos, Andreia and Pinela, Nuno and Alves, Pedro and Santos, Rodrigo and Farinha, Ricardo and Fortunato, Elvira and Martins, Rodrigo and Águas, Hugo and Igreja, Rui (2019) E-skin bimodal sensors for robotics and prosthesis using PDMS molds engraved by laser. Sensors, 19 (4). 899. ISSN 1424-8220 (https://doi.org/10.3390/s19040899)
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Abstract
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.
ORCID iDs
dos Santos, Andreia, Pinela, Nuno, Alves, Pedro ORCID: https://orcid.org/0000-0003-3447-6878, Santos, Rodrigo, Farinha, Ricardo, Fortunato, Elvira, Martins, Rodrigo, Águas, Hugo and Igreja, Rui;-
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Item type: Article ID code: 67364 Dates: DateEvent21 February 2019Published18 February 2019AcceptedSubjects: Technology > Engineering (General). Civil engineering (General) > Bioengineering
Science > PhysicsDepartment: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 19 Mar 2019 15:10 Last modified: 08 Oct 2024 09:08 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/67364