摘要
Monitoring physiological signals is essential for individual healthcare.Muscles,which are the primary components responsible for human movement,produce biomechanical and bioelectrical signals during contraction and relaxation.However,the simultaneous monitoring of these two types of signals remains challenging.In this work,a four-layered all-fibrous multimodal sensor patch(FMSP)is developed,comprising a structured pressure sensor unit and an electrophysiological electrode unit.This patch utilizes a pressure sensor to monitor force myography(FMG)signal and an electrophysiological electrode to track electromyogram(EMG)signal,enabling simultaneous monitoring of both during muscle activity.The pressure sensor,featuring a micro-hump structure on the fibrous membrane surface,achieves a high sensitivity of 148.1 kPa^(−1)and a broad monitoring range of 0.054 to 200 kPa.Additionally,an adhesive fibrous membrane enables the electrophysiological electrode to maintain a high adhesion strength of 67.6 kPa.This ensures a stable and low skin-electrode interface impedance and demonstrates a high signal-to-noise ratio(SNR)of 21.8 dB for the EMG signal,significantly improving upon commercial gel electrodes.The FMSP can synchronously monitor both FMG and EMG signals during arm movements,distinguishing between different bending angles and lifting weights.This multimodal sensor patch shows promising applications in muscle health monitoring,wearable intelligent sensing,and human-machine interfaces.
监测生理信号对个体健康至关重要.肌肉,作为人体运动系统的核心组成部分,在收缩和放松过程中会产生生物力学信号和生物电信号.然而,同步监测这两种信号仍然具有挑战性.本研究中,我们开发了一种具有四层全纤维的多模态传感器贴片(FMSP),其包含结构化的压力传感器单元和电生理电极单元.该贴片利用压力传感器监测肌力图(FMG)信号,利用电生理电极记录肌电图(EMG)信号,从而实现了在肌肉活动过程中对这两种信号的同步监测.压力传感器采用了微小凸起结构,具有148.1 kPa^(-1)的高灵敏度和0.054至200 kPa的宽监测范围.此外,其黏性纤维膜赋予了电生理电极67.6 kPa的高黏附强度,确保了皮肤与电极界面间的稳定接触,并降低了界面阻抗.所采集的EMG信号具有21.8 dB的高信噪比,显著优于商业凝胶电极.FMSP能在手臂活动过程中同步监测FMG和EMG信号,并能区分不同的弯曲角度和举起重量.这种多模态传感器贴片在肌肉健康监测、可穿戴智能传感以及人机界面等方面展现出广阔的应用前景.
基金
the Fundamental Research Funds for the Central Universities(2232024Y-01,2232024A-05)
the National Natural Science Foundation of China(52373201,52103252)
the National Key Research and Development Program of China(2023YFB3809902)。
