Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Adaptive Pressure Sensor with High Sensitivity and Large Bandwidth Based on Gallium Microdroplet-elastomer Composite

갈륨 미세입자 탄성 복합체 기반 고민감도와 광대역폭을 갖는 가변 강성 압력센서

  • Simok, Lee (School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Sang-Hyuk, Byun (School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Steve, Park (Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Joo Yong, Sim (Department of Mechanical Systems Engineering, Sookmyung Women's University) ;
  • Jae-Woong, Jeong (School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST))
  • 이시목 (한국과학기술원 전기 및 전자공학부) ;
  • 변상혁 (한국과학기술원 전기 및 전자공학부) ;
  • 스티브박 (한국과학기술원 신소재공학과) ;
  • 심주용 (숙명여자대학교 기계시스템학부) ;
  • 정재웅 (한국과학기술원 전기 및 전자공학부)
  • Received : 2022.10.17
  • Accepted : 2022.11.08
  • Published : 2022.11.30
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Abstract

A pressure sensor that mimics the sensing ability of human skin has emerged as high-profile technology because it shows remarkable applications in numerous fields such as robotics, human health monitoring, and artificial prosthetics. Whereas recent pressure sensors have achieved high sensitivity similar to that of human skin, they still show limited detection bandwidth. Moreover, once these e-skin are fabricated, their sensitivity and stiffness are fixed; therefore, they can be used for only limited applications. Our study proposes a new adaptive pressure sensor built with uniform gallium microdroplet-elastomer composite. Based on the phase transition of gallium microdroplets, the proposed sensor undergoes mode transformation, enabling it to have a higher sensitivity and wider detection bandwidth compared with those of human skin. In addition, we succeeded in extending a single adaptive pressure sensor to sensor arrays based on its high uniformity, reproducibility, and large-scale manufacturability. Finally, we designed an adaptive e-skin with the sensor array and demonstrated its applications on health monitoring tasks including blood pulse and body weight measurements.

Keywords

References

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