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Journal Article
Strain-Insensitive Pressure Sensing Mechanism Enabled by Dissimilar Materials with Highly Contrasting Properties
- Authors
- Geonwoo Hwang, Sungryul Yun
- Issue Date
- 2025-11
- Citation
- 센서학회지, v.34, no.6, pp.610-617
- ISSN
- 1225-5475
- Publisher
- 한국센서학회
- Language
- English
- Type
- Journal Article
- Abstract
- Stretchable pressure sensors face a critical challenge where mechanical strain interferes with pressure sensing accuracy, limiting their practical deployment in wearable electronics and soft robotics. This paper presents a novel strain-insensitive pressure sensing mechanism enabled by dissimilar materials with highly contrasting properties. The sensor employs a highly stretchable elastomer as the overall substrate and CNT-dispersed elastomer with relatively higher modulus at sensing points, creating a configuration where strain occurs only in the periphery while sensing regions remain mechanically stable. Liquid metal electrodes enable signal transmission without distortion under mechanical deformation. Material characterization revealed that liquid metal exhibits negligible resistance changes under strain, while CNT-based conductive polymers demonstrate significant piezoresistive responses to pressure. Performance evaluation under simultaneous strain and pressure conditions verified consistent piezoresistive properties regardless of applied strain levels, validating the strain-insensitive mechanism. The fabrication process utilizes simple molding, coating, and patterning techniques with readily available materials, making it highly suitable for mass production. This approach enables accurate pressure measurements in dynamic environments while maintaining excellent mechanical robustness, opening pathways for advanced tactile sensing applications in prosthetics, human-machine interfaces, and soft robotics, where both spatial resolution and strain insensitivity are essential.
- KSP Keywords
- Dissimilar materials, Dynamic Environment, Fabrication process, Human Machine Interface(HMI), Liquid metal electrodes, Material Characterization, Patterning technique, Performance evaluation, Piezoresistive properties, Pressure Sensor, Sensing accuracy
This work is distributed under the term of Creative Commons License (CCL)
(CC BY NC)
(CC BY NC)
