有机凝胶肌电电极制备及其在动态手势识别的应用  

Preparation of organohydrogel EMG electrodes and their application in dynamic gesture recognition

作　　者：张建寰 徐益鑫 邓连钧 徐周毅 张陈涛 ZHANG Jianhuan;XU Yixin;DENG Lianjun;XU Zhouyi;ZHANG Chentao(Pen-Tung Sah Institute of Micro-Nano Science and Technology,Xiamen University,Xiamen 361102,China)

机构地区：[1]厦门大学萨本栋微米纳米科学技术研究院,福建厦门361102

出　　处：《中南大学学报（自然科学版）》2024年第6期2153-2161,共9页Journal of Central South University:Science and Technology

基　　金：福建省自然科学基金资助项目(2023J01047);厦门市自然科学基金资助项目(3502Z20227185)。

摘　　要：为了解决传统肌电电极与皮肤贴合度不佳,易造成运动伪影的问题,本文提出一种高离子导电、良好自黏附的有机凝胶作为电极检测肌电信号,并将其应用于动态手势动作的识别。首先,采用物理交联与化学交联结合的互贯穿网络结构,在生物相容性的聚丙烯酰胺/海藻酸钠体系中加入单宁酸、氯化钠和甘油,获得聚丙烯酰胺/海藻酸钠/单宁酸有机凝胶;其次,测试制备的有机凝胶力学、导电及黏附等性能,并将其作为皮肤表面电极进行肌电信号的检测;最后,使用卷积神经网络算法将其应用于动态手势动作的识别。研究结果表明:制备的有机凝胶具有低弹性模量以及可逆自黏附能力,可实现与皮肤的保形黏附;有机凝胶具有7.7 kPa的弹性模量、310%的伸长率、2.81 mS/cm的离子导电率,并具有良好的自黏附性能以及可降解性,能够获得17.14 dB信噪比的高质量肌电信号,能够有效识别不同界面操作的动态动作及手语手势,平均识别率分别达95.04%和98.67%。该有机凝胶电极具有高信噪比,可有效识别动态手势,在人机交互、机器人遥操作领域具有广阔的应用前景。To address the issue of motion artifacts and poor adherence between traditional electromyographic(EMG)electrodes and the skin,a conductive and self-adhesive organohydrogel was proposed as electrodes for monitoring EMG signals,which was applied to recognize dynamic hand gestures.Firstly,an interpenetrating network structure combining physical and chemical crosslinking was used to prepare the polyacrylamide/sodium alginate/tannic acid organohydroge by adding tannic acid,sodium chloride,and glycerol into a biocompatible polyacrylamide/sodium alginate system.Secondly,the mechanical,conductive and adhesive properties of the prepared organohydrogel were tested.Finally,a convolutional neural network(CNN)algorithm was employed for the recognition of dynamic hand gestures.The results show that the prepared organohydrogel has a low elastic modulus and reversible self-adhesive ability,achieving conformal adhesion to the skin.Meanwhile,the organohydrogel has an elastic modulus of 7.7 kPa,an elongation rate of 310%,an ionic conductivity of 2.81 mS/cm,and good self-adhesive performance as well as degradability.When they are used as skin surface electrodes for EMG signal detection,they can obtain high-quality EMG signals with a signal-to-noise ratio(SNR)of 17.14 dB,and effectively recognize dynamic actions of different interface operations and sign language gestures,with average recognition rates reaching 95.04%and 98.67%,respectively.The organohydrogel electrodes have a high signal-to-noise ratio,can effectively recognize dynamic gestures,and thus have broad application prospects in the fields of human-computer interaction and teleoperation of robots.

关 键 词：肌电信号 有机凝胶 柔性电极 动态手势识别 

分 类 号：TP204[自动化与计算机技术—检测技术与自动化装置]