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

被引：52

作者：

Gu, Jimin ^{[1
]}

Ahn, Junseong ^{[1
,2
]}

Jung, Jiyoung ^{[1
]}

Cho, Seokjoo ^{[1
]}

Choi, Jungrak ^{[1
]}

Jeong, Yongrok ^{[2
]}

Park, Jaeho ^{[1
]}

Hwang, Soonhyoung ^{[2
]}

Cho, Incheol ^{[1
]}

Ko, Jiwoo ^{[1
,2
]}

Ha, Ji-Hwan ^{[1
,2
]}

Zhao, Zhi-Jun ^{[2
]}

Jeon, Sohee ^{[2
]}

Ryu, Seunghwa ^{[1
]}

Jeong, Jun-Ho ^{[2
]}

Park, Inkyu ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol KAIST, Dept Mech Engn, Daejeon 34141, South Korea

[2] Korea Inst Machinery & Mat KIMM, Dept Nano Mfg Technol, Daejeon 34103, South Korea

来源：

NANO ENERGY | 2021年 / 89卷

基金：

新加坡国家研究基金会;

关键词：

Optical strain sensors; Mechanical metamaterials; Auxetic structures; Soft sensors; Self-powered sensors; SKIN; TRANSPARENT; PERFORMANCE; PRESSURE; RANGE;

D O I：

10.1016/j.nanoen.2021.106447

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

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