Environment-Resilient Graphene Vibrotactile Sensitive Sensors for Machine Intelligence
Version 2 2020-07-23, 13:10
Version 1 2020-07-20, 12:36
Posted on 2020-07-23 - 13:10
Skin-like
sensors that transduce tactile pressures and vibrations
with minimal environment variation on performance are crucial in robotic
sensing and prosthetic skins. However, sensor performance variations
under varying environmental conditions, such as temperature and humidity,
are common in piezoresistive sensors because of their intrinsic materials
properties. Moreover, the viscoelasticity of soft elastomers causes
strain response in a time-dependent fashion, which poses sensor limitations
in high-frequency tactile tasks, such as texture recognition. In this
work, we demonstrate a new environment-robust tactile sensor via an
interfacial engineering process for uniform graphene coating on microstructured
elastomers. The sensor enables reliable pressure response over a range
of temperature (25–60 °C) and humidity (30–90%
relative humidity) conditions, with resistance variations less than
5% and 3%, respectively. It is also able to detect vibrations with
frequency up to 1500 Hz. Moreover, our sensor shows ultra-high durability,
with high sensitivity and low hysteresis preserved after 1 million
cycles. We demonstrate applications with the sensor in epidermal signal
monitoring at different arteries, as well as accurate (>95%) surface
texture recognition in combination with machine learning.
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Yao, Haicheng; Li, Pengju; Cheng, Wen; Yang, Weidong; Yang, Zijie; Ali, Hashina Parveen
Anwar; et al. (2020). Environment-Resilient Graphene Vibrotactile Sensitive Sensors for Machine Intelligence. ACS Publications. Collection. https://doi.org/10.1021/acsmaterialslett.0c00160
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AUTHORS (8)
HY
Haicheng Yao
PL
Pengju Li
WC
Wen Cheng
WY
Weidong Yang
ZY
Zijie Yang
HA
Hashina Parveen
Anwar Ali
HG
Hongchen Guo
BT
Benjamin C. K. Tee
KEYWORDS
environment variationtime-dependent fashionsensor performance variationselastomers causes strain responseEnvironment-Resilient Graphene Vibr...prosthetic skinssensor limitationspressure responseuniform graphene coatingengineering processresistance variationsMachine Intelligence Skin-like sensorsultra-high durabilitymaterials properties1500 Hztexture recognitionmicrostructured elastomersepidermal signal monitoringpiezoresistive sensors