摘要
Muscles,the fundamental components supporting all human movement,exhibit various signals upon contraction,including mechanical signals indicat-ing tremors or mechanical deformation and electrical signals responsive to muscle fiber activation.For noninvasive wearable devices,these signals can be measured using surface electromyography(sEMG)and force myography(FMG)techniques,respectively.However,relying on a single source of infor-mation is insufficient for a comprehensive evaluation of muscle condition.In order to accurately and effectively evaluate the various states of muscles,it is necessary to integrate sEMG and FMG in a spatiotemporally synchronized manner.This study presents a flexible sensor for multimodal muscle state monitoring,integrating serpentine-structured sEMG electrodes with fingerprint-like FMG sensors into a patch approximately 250μm thick.This design achieves a multimodal assessment of muscle conditions while maintaining a compact form factor.A thermo-responsive adhesive hydrogel is incorporated to enhance skin adhesion,improving the signal-to-noise ratio of the sEMG signals(33.07 dB)and ensuring the stability of the FMG sensor dur-ing mechanical deformation and tremors.The patterned coupled sensing patch demonstrates its utility in tracking muscular strength,assessing fatigue levels,and discerning features of muscle dysfunction by analyzing the time-domain and frequency-domain characteristics of the mechanical–electrical coupled signals,highlighting its potential application in sports training and rehabilita-tion monitoring.
基金
National Key Research and Development Program of China,Grant/Award Number:2022YFE0111700
National Natural Science Foundation of China,Grant/Award Numbers:T2125003,82202075
Beijing Natural Science Foundation,Grant/Award Number:L212010
National Postdoctoral Program for Innovative Talents,Grant/Award Number:BX20220380
China Postdoctoral Science Foundation,Grant/Award Number:2022M710389
Fundamental Research Funds for the Central Universities。
作者简介
Correspondence:Yang Zou,School of Medical Technology,Beijing Institute of Technology,Beijing 100081,the People's Republic of China.Email:zouyang@bit.edu.cn;Correspondence:Yulin Deng,School of Medical Technology,Beijing Institute of Technology,Beijing 100081,the People's Republic of China.Email:deng@bit.edu.cn;Correspondence:Zhou Li,Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 101400,the People's Republic of China.https://orcid.org/0000-0002-9952-7296,Email:zli@binn.cas.cn。
