Abstract
Abstract
Soft piezoresistive wearable conductors have led to a paradigm shift in the monitoring of human bodily motions. Cellular additively manufactured conductors are promising piezoresistive components as they offer mechanical tunability and provide controllable percolation pathways. In the present study, we engineer high surface-area cellular structures with the triply periodic minimal surface (TPMS)-based architectures to tailor their piezoresistive response for use in wearable devices. A simple and economical fabrication process is proposed, wherein a fused deposition modeling 3D printing technique is utilized to fabricate flexible thermoplastic polyurethane (TPU) cellular structures. Interconnectivity of TPMS designs enables the coating of a continuous graphene layer over the TPU internal surfaces via a facile dip-coating process. The effects of pore shape on piezoresistivity are studied in four different TPMS structures (i.e. Primitive, Diamond, Gyroid, and I-WP). Mechanical properties of sensors are evaluated through experimental procedures and computation methods using finite element analysis of the Mooney–Rivlin hyperelastic model. The piezoresistive performance of sensors exhibits durability under cyclic compression loading. Finally, we conclude that the Primitive structure offers suitable piezoresistive characteristics for sensing of walking, whereas the Diamond structure presents favorable results for respiration monitoring.
Subject
Electrical and Electronic Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics,Civil and Structural Engineering,Signal Processing
Reference84 articles.
1. System for measurement of joint range of motion using inertial sensors;Sharma;Biomed. Res.,2017
2. Efficiency investigation of artificial neural networks in human activity recognition;Suto;J. Ambient Intell. Humaniz. Comput.,2018
3. Wearable sensors used for human gait analysis;Tarniţă;Rom J. Morphol. Embryol.,2016
4. Ambient assisted living technologies for older adults with cognitive and physical impairments: a review;Ganesan;Eur. Rev. Med. Pharmacol. Sci.,2019
5. Validity and reliability of a shoe-embedded sensor module for measuring foot progression angle during over-ground walking;Charlton;J. Biomech.,2019
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献