Next Article in Journal
Design and Evaluation of a Scalable and Reconfigurable Multi-Platform System for Acoustic Imaging
Next Article in Special Issue
Enhancement of Frequency Stability Using Synchronization of a Cantilever Array for MEMS-Based Sensors
Previous Article in Journal
Low-Coherence Reflectometry for Refractive Index Measurements of Cells in Micro-Capillaries
Previous Article in Special Issue
A Novel Passive Wireless Sensor for Concrete Humidity Monitoring
Open AccessArticle

Stretchable Complementary Split Ring Resonator (CSRR)-Based Radio Frequency (RF) Sensor for Strain Direction and Level Detection

School of Electrical and Electronics Engineering, College of Engineering, Chung-Ang University, 221 Heukseok-dong, Dongjak-gu, Seoul 156-756, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Ferran Martín and Jordi Naqui
Sensors 2016, 16(10), 1667; https://doi.org/10.3390/s16101667
Received: 5 August 2016 / Revised: 30 September 2016 / Accepted: 8 October 2016 / Published: 11 October 2016
In this paper, we proposed a stretchable radio frequency (RF) sensor to detect strain direction and level. The stretchable sensor is composed of two complementary split ring resonators (CSRR) with microfluidic channels. In order to achieve stretchability, liquid metal (eutectic gallium-indium, EGaIn) and Ecoflex substrate are used. Microfluidic channels are built by Ecoflex elastomer and microfluidic channel frames. A three-dimensional (3D) printer is used for fabrication of microfluidic channel frames. Two CSRR resonators are designed to resonate 2.03 GHz and 3.68 GHz. When the proposed sensor is stretched from 0 to 8 mm along the +x direction, the resonant frequency is shifted from 3.68 GHz to 3.13 GHz. When the proposed sensor is stretched from 0 to 8 mm along the −x direction, the resonant frequency is shifted from 2.03 GHz to 1.78 GHz. Therefore, we can detect stretched length and direction from independent variation of two resonant frequencies. View Full-Text
Keywords: stretchable sensor; 3D printing; microfluidic channel; CSRR; EGaIn; Ecoflex stretchable sensor; 3D printing; microfluidic channel; CSRR; EGaIn; Ecoflex
Show Figures

Figure 1

MDPI and ACS Style

Eom, S.; Lim, S. Stretchable Complementary Split Ring Resonator (CSRR)-Based Radio Frequency (RF) Sensor for Strain Direction and Level Detection. Sensors 2016, 16, 1667.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop