Multimodal integrated flexible electronic skin for physiological perception and contactless kinematics pattern recognition

Abstract

Multimodal integrated flexible electronic skin offers exceptional processing capability and versatility in various application scenarios. Researchers are devoting to developing nanomaterials or nano-devices with multidisciplinary functions. Herein, a trinary-mode integrated flexible electronic skin (E-Skin) was designed for physiological perception and contactless kinematics pattern recognition, which serves as real-time health monitor, electrode patch and contactless sensor. The composite film of liquid metal particles and thermoplastic polyurethane elastomers (LMPs@TPU) was prepared by a combination of electrostatic spinning, electrostatic spraying, and knife coating, which can be stretched up to 404.7 % at stress of 1Mpa. The film was endowed three functional modes through different forms of encapsulation, which allows for (1) detecting human arthrosis movements, muscle stretching, and inspiration, (2) achieving a real-time capture of Electrocardiogram (ECG) and surface electromyography (sEMG), and a Human-Machine Interaction (HMI) system for game control based on sEMG signals was also developed, (3) a contactless sensor combining with a machine learning model which realizes the recognition of human motion patterns with a receiver operating characteristic curve and area under curve score (ROC-AUC-score) of 0.99. The three models of this E-Skin highlight the significant potential for industrialization in various fields, such as HMI, physiological perception, virtual reality, and motion analysis.