삼차원 프린트된 몰드와 액체 금속을 이용한 웨어러블 힘 센서 개발 Wearable Force Sensor Using 3D-printed Mold and Liquid Metal

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In this study, we propose a wearable force sensor using 3D printed mold and liquid metal. Liquid metal, such as Galinstan, is one of the promising functional materials in stretchable electronics known for its intrinsic mechanical and electronic properties. The proposed soft force sensor measures the external force by the resistance change caused by the crosssectional area change. Fused deposition modeling-based 3D printing is a simple and cost-effective fabrication of resilient elastomers using liquid metal. Using a 3D printed microchannel mold, 3D multichannel Galinstan microchannels were fabricated with a serpentine structure for signal stability because it is important to maintain the sensitivity of the sensor even in various mechanical deformations. We performed various electro-mechanical tests for performance characterization and verified the signal stability while stretching and bending. The proposed sensor exhibited good signal stability under 100% longitudinal strain, and the resistance change ranged within 5% of the initial value. We attached the proposed sensor on the finger joint and evaluated the signal change during various finger movements and the application of external forces.
Publisher
한국센서학회
Issue Date
2019-05
Language
Korean
Citation

센서학회지, v.28, no.3, pp.198 - 204

ISSN
1225-5475
DOI
10.5369/JSST.2019.28.3.198
URI
http://hdl.handle.net/10203/271352
Appears in Collection
ME-Journal Papers(저널논문)
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