Advancing sensing resolution of impedance hand gesture recognition devices
File(s)
Author(s)
Lou, Zhiyuan
Min, Xue
Li, Guanhan
Avery, James
Stewart, Rebecca
Type
Journal Article
Abstract
Gestures are composed of motion information (e.g. movements of fingers) and force information (e.g. the force exerted on fingers when interacting with other objects). Current hand gesture recognition solutions such as cameras and strain sensors primarily focus on correlating hand gestures with motion information and force information is seldom addressed. Here we propose a bio-impedance wearable that can recognize hand gestures utilizing both motion information and force information. Compared with previous impedance-based gesture recognition devices that can only recognize a few multi-degrees-of-freedom gestures, the proposed device can recognize 6 single-degree-of-freedom gestures and 20 multiple-degrees-of-freedom gestures, including 8 gestures in 2 force levels. The device uses textile electrodes, is benchmarked over a selected frequency spectrum, and uses a new drive pattern. Experimental results show that 179 kHz achieves the highest signal-to-noise ratio (SNR) and reveals the most distinct features. By analyzing the 49,920 samples from 6 participants, the device is demonstrated to have an average recognition accuracy of 98.96%. As a comparison, the medical electrodes achieved an accuracy of 98.05%.
Date Issued
2024-10
Date Acceptance
2024-06-14
Citation
IEEE Journal of Biomedical and Health Informatics, 2024, 28 (10), pp.5855-5864
ISSN
2168-2194
Publisher
IEEE
Start Page
5855
End Page
5864
Journal / Book Title
IEEE Journal of Biomedical and Health Informatics
Volume
28
Issue
10
Copyright Statement
Copyright © 2024 IEEE. This is the author’s accepted manuscript made available under a CC-BY licence in accordance with Imperial’s Research Publications Open Access policy (www.imperial.ac.uk/oa-policy)
License URL
Identifier
https://ieeexplore.ieee.org/abstract/document/10568331
Publication Status
Published
Date Publish Online
2024-06-21