A Batteryless, Wireless Strain Sensor Using Resonant Frequency Modulation

Title
A Batteryless, Wireless Strain Sensor Using Resonant Frequency Modulation
Authors
추남선Kyeong Jae LeeSohee Kim
Issue Date
2018-11
Publisher
Sensors
Citation
VOL 18, NO 11-11
Abstract
In this study, we demonstrated the feasibility of a wireless strain sensor using resonant frequency modulation through tensile impedance test and wireless sensing test. To achieve a high stretchability, the sensor was fabricated by embedding a copper wire with high conductivity in a silicone rubber with high stretchability, in which the resonant frequency can be modulated according to changes in strain. The characteristics of the sensor and the behavior of wireless sensing were calculated based on equations and simulated using finite element method. As the strain of the sensor increased, the inductance increased, resulting in the modulation of resonant frequency. In experimental measurement, as the strain of the sensor increased from 0% to 110%, its inductance was increased from 192 nH to 220 nH, changed by 14.5%, and the resonant frequency was shifted from 13.56 MHz to 12.72 MHz, decreased by 6.2%. It was demonstrated that using the proposed sensor, strains up to 110% could be detected wirelessly up to a few centimeters.
URI
http://pubs.kist.re.kr/handle/201004/69779
ISSN
1424-8220
Appears in Collections:
KIST Publication > Article
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