Ultra-sensitive Flexible Sponge-Sensor Array for Muscle Activities Detection and Human Limb Motion Recognition

• URL: http://arxiv.org/abs/2205.03238v1
• Date: Sat, 30 Apr 2022 06:44:26 GMT
• Title: Ultra-sensitive Flexible Sponge-Sensor Array for Muscle Activities Detection and Human Limb Motion Recognition
• Authors: Jiao Suo, Yifan Liu, Clio Cheng, Keer Wang, Meng Chen, Ho-yin Chan, Roy Vellaisamy, Ning Xi, Vivian W. O. Lou, and Wen Jung Li
• Abstract summary: Human limb motion tracking and recognition plays an important role in medical rehabilitation training, lower limb assistance, prosthetics design for amputees, etc. This work demonstrates a portable wearable muscle activity detection device with a lower limb motion recognition application.
• Score: 8.26625796934816
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Human limb motion tracking and recognition plays an important role in medical rehabilitation training, lower limb assistance, prosthetics design for amputees, feedback control for assistive robots, etc. Lightweight wearable sensors, including inertial sensors, surface electromyography sensors, and flexible strain/pressure, are promising to become the next-generation human motion capture devices. Herein, we present a wireless wearable device consisting of a sixteen-channel flexible sponge-based pressure sensor array to recognize various human lower limb motions by detecting contours on the human skin caused by calf gastrocnemius muscle actions. Each sensing element is a round porous structure of thin carbon nanotube/polydimethylsiloxane nanocomposites with a diameter of 4 mm and thickness of about 400 {\mu}m. Three human subjects were recruited to perform ten different lower limb motions while wearing the developed device. The motion classification result with the support vector machine method shows a macro-recall of about 94.48% for all ten motions tested. This work demonstrates a portable wearable muscle activity detection device with a lower limb motion recognition application, which can be potentially used in assistive robot control, healthcare, sports monitoring, etc.

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