Self-powered strain sensor based on the piezo-transmittance of a mechanical metamaterial

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In the field of soft strain sensors, piezo-transmittance based strain sensors, which detect strains by optical transmittance change, have promising advantages of fast response, high sensitivity, long-term stability, and negligible effect from environmental factors. However, they feature low sensor-to-sensor and in-sensor uniformity as well as unpredictable response and high stiffness. This study exploits the gap control of an auxeticpatterned elastomer to develop a piezo-transmittance based strain sensor. Gap opening mechanism in the negative Poisson's ratio metamaterial with rotating square structures makes the sensor free from these limitations; thus, achieving a designable response and low stiffness. In addition, high sensor-to-sensor ((root-meansquare deviation (RSD) < 3.5%) and in-sensor (RSD < 5%) uniformities are achieved by uniform metal-deposited light-blocking film. Finally, the developed sensor has been integrated with a solar cell and Bluetooth Low Energy (BLE) 4.0 to afford a self-powered wireless strain sensing system that is successfully applied to structural health monitoring and human motion monitoring.
Publisher
ELSEVIER
Issue Date
2021-11
Language
English
Article Type
Article
Citation

NANO ENERGY, v.89

ISSN
2211-2855
DOI
10.1016/j.nanoen.2021.106447
URI
http://hdl.handle.net/10203/288224
Appears in Collection
ME-Journal Papers(저널논문)
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