Liquid Metal Flexible EMG Gel Electrodes for Gesture Recognition

Author:

Bai Yanru12ORCID,Li Xiaoqing3,Zheng Chengcai1,Guo Rui3,Li Xisheng1

Affiliation:

1. School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China

2. School of Advanced Engineering, University of Science and Technology Beijing, Beijing 100083, China

3. Department of Biomedical Engineering, Tianjin University, Tianjin 300072, China

Abstract

Gesture recognition has been playing an increasingly important role in the field of intelligent control and human–computer interaction. Gesture recognition technology based on electromyography (EMG) with high accuracy has been widely applied. However, conventional rigid EMG electrodes do not fit the mechanical properties of human skin. Therefore, rigid EMG electrodes are easily influenced by body movements, and uncomfortable to wear and use for a long time. To solve these problems, a stretchable EMG electrode based on liquid metal nanoparticles was developed in this research. It is conformal with human skin because of its similar mechanical properties to skin. Liquid metal nanoparticles mixed in polymer can be connected to each other to form conductive circuits when pressed by mechanical force. Therefore, this preparation method of liquid metal flexible gel electrodes is low-cost and can be fabricated largely. Moreover, the liquid metal flexible gel electrodes have great stretch ability. Their resistance increases slightly at maximum strain state. Based on these advantages, the flexible gel electrodes are applied to arm to collect EMG signals generated by human hand movements. In addition, the signals are analyzed by artificial intelligence algorithm to realize accurate gesture recognition.

Funder

High altitude PSA/M coupling oxygen production process and high precision oxygen concentration and flow integrated detector development

Publisher

MDPI AG

Subject

Clinical Biochemistry,General Medicine,Analytical Chemistry,Biotechnology,Instrumentation,Biomedical Engineering,Engineering (miscellaneous)

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