https://doi.org/10.1140/epjs/s11734-025-01560-9
Regular Article
Sandwich-structured flexible strain sensors for gesture recognition in human–computer interaction
1
Zhejiang Key Laboratory of Quantum State Control and Optical Field Manipulation, Department of Physics, Zhejiang Sci-Tech University, 310018, Hangzhou, China
2
Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, College of Mechanical Engineering, Zhejiang University of Technology, 310023, Hangzhou, China
a
wuhuaping@gmail.com
b
chenglin@zstu.edu.cn
c
liuaiping1979@gmail.com
Received:
29
October
2024
Accepted:
27
February
2025
Published online:
27
March
2025
Flexible strain sensors are crucial for advancing human–computer interaction (HCI) technologies, especially in applications that require precise and adaptive sensing capabilities. In this study, we use polydimethylsiloxane (PDMS) as the substrate material to construct sandwich-structured flexible strain sensors, incorporating a CNT/PDMS conductive polymer (CP) layer between two cross-positioned PDMS-transferred laser-induced graphene (LIG) strips (PL). The sandwich-structured PL/CP/PL sensor exhibits excellent flexibility, structural stability, and component compatibility, effectively enabling the detection of tensile, compressive, and bending strains while overcoming the limitations of single-layer strain sensors and facilitating the measurement of two-dimensional directional forces. Leveraging these capabilities, we apply the sensor to sign language recognition and develop a gesture-based HCI system that utilizes Morse and binary codes to enable intuitive, intelligent communication with the sensors. This advancement holds significant potential to enhance user experience and operational efficiency in virtual reality environments, coded communications systems, and robotics.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjs/s11734-025-01560-9.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
