논문 해외 국제전문학술지(SCI급) Self-powered strain sensor based on the piezo-transmittance of a mechanical metamaterial
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2021-11
- 저자명 Jimin Gu, Junseong Ahn, Jiyoung Jung, Seokjoo Cho, Jungrak Choi, Yongrok Jeong, Jaeho Park, Soonhyoung Hwang, Incheol Cho, Jiwoo Ko, Ji-Hwan Ha, Zhi-Jun Zhao, Sohee Jeon, Seunghwa Ryu, Jun-Ho Jeong, Inkyu Park
- 학술지명 Nano Energy
- 발행국가 해외
- 논문언어 외국어
- 원문 링크 https://www.sciencedirect.com/science/article/abs/pii/S2211285521007023
홈페이지논문 초록 (Abstract)
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 auxetic-patterned 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-mean-square 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.