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학술지 A highly Stretchable Optical Strain Sensor Monitoring Dynamically Large Strain for Deformation-controllable Soft Actuator
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저자
윤성률, 정재연, 문성철, 경기욱
발행일
202109
출처
Smart Materials and Structures, v.30 no.10, pp.1-12
ISSN
0964-1726
출판사
Institute of Physics (IOP)
DOI
https://dx.doi.org/10.1088/1361-665X/ac1f63
협약과제
21HS3900, 신체기능의 이상이나 저하를 극복하기 위한 휴먼 청각 및 근력 증강 원천 기술 개발, 신형철
초록
In this paper, we report a highly stretchable optical strain sensor that can be compatible with artificial muscle and wearable human-assistive devices. The optical strain sensor is fabricated by embedding a polymeric optical fiber thermoformed for bi-tortuous structure in silicone elastomer. The strain sensor can detect uniaxial strain using amplitude of output light intensity that increases as curvature of the curved regions becomes enlarged with uniaxial strain. Due to the benefits from curvilinear design of the optical fiber and sensor structure with the elastomeric matrix securing geometric recovery from being elongated, the strain sensor is capable of reliable detection of arbitrary tensile strain in a wide range from 0% to 120%. It possesses fast, reversible, and durable strain-sensing performance with a small hysteresis even under continuative cyclic loadings of large strain. As integrated into a soft rolled-actuator based on acrylic elastomer, we finally demonstrate the strain-sensor performance is enough to monitor dynamic deformation response of the soft actuator.
키워드
bi-tortuous structure, dynamic strain detection, elastomeric matrix, optical fiber, strain sensor
KSP 제안 키워드
Acrylic elastomer, Artificial Muscle, Assistive devices, Deformation response, Dynamic deformation, Large strains, Polymeric optical fiber, Sensing Performance, Sensor Performance, Silicone elastomer, Soft actuator