材料科学
离子键合
电极
生物医学工程
电阻抗
生物电阻抗分析
串扰
肌电图
人工肌肉
纳米技术
光电子学
声学
计算机科学
离子
执行机构
电子工程
人工智能
电气工程
物理医学与康复
有机化学
物理化学
病理
工程类
物理
化学
医学
体质指数
作者
Liang Pan,Pingqiang Cai,Lianfu Mei,Yuan Cheng,Yi Zeng,Ming Wang,Ting Wang,Ying Jiang,Baohua Ji,Dechang Li,Xiao Chen
标识
DOI:10.1002/adma.202003723
摘要
Abstract Simultaneous implementation of high signal‐to‐noise ratio (SNR) but low crosstalk is of great importance for weak surface electromyography (sEMG) signals when precisely driving a prosthesis to perform sophisticated activities. However, due to gaps with the curved skin during muscle contraction, many electrodes have poor compliance with skin and suffer from high bioelectrical impedance. This causes serious noise and error in the signals, especially the signals from low‐level muscle contractions. Here, the design of a compliant electrode based on an adhesive hydrogel, alginate–polyacrylamide (Alg‐PAAm) is reported, which eliminates those large gaps through the strong electrostatic interaction and abundant hydrogen bond with the skin. The obtained compliant electrode, having an ultralow bioelectrical impedance of ≈20 kΩ, can monitor even 2.1% maximal voluntary contraction (MVC) of muscle. Furthermore, benefiting from the high SNR of >5:1 at low‐level MVC, the crosstalk from irrelevant muscle is minimized through reducing the electrode size. Finally, a prosthesis is successfully demonstrated to precisely grasp a needle based on a 9 mm 2 Alg‐PAAm compliant electrode. The strategy to design such compliant electrodes provides the potential for improving the quality of dynamically weak sEMG signals to precisely control prosthesis in performing purposefully dexterous activity.
科研通智能强力驱动
Strongly Powered by AbleSci AI