Dynamic Measurement of Legs Motion in Sagittal Plane Based on Soft Wearable Sensors

Human motion capture is widely used in exoskeleton robots, human-computer interaction, sports analysis, rehabilitation training, and many other fields. However, soft-sensor-based wearable dynamic measurement has not been well achieved. In this paper, the dynamic measurements of legs were investigate...

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Bibliographic Details
Published in:Journal of sensors 2020, Vol.2020 (2020), p.1-10
Main Authors: Zhao, Jianwen, Jin, Tao, Qin, Shihao, McCoul, David, Li, Yongze, Feng, Yaqing, Huang, Bo
Format: Article
Language:English
Subjects:
Carbon
Circuits
Deformation
Elastomers
Electrodes
Exoskeletons
Human motion
Low speed
Motion capture
Rehabilitation
Sensors
Walking
Wearable technology
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Summary:Human motion capture is widely used in exoskeleton robots, human-computer interaction, sports analysis, rehabilitation training, and many other fields. However, soft-sensor-based wearable dynamic measurement has not been well achieved. In this paper, the dynamic measurements of legs were investigated by using dielectric elastomers as stain sensors, and an alternating signal was applied to detect the dynamic rotational angles of the legs. To realize a quick response, parameters of the sensors were optimized by circuit analysis. The sensor can detect hip, knee, and ankle joint motions with a sample frequency of 200 Hz. The measurements of the sensors were compared with a commercial motion capture system from PhaseSpace, and dynamic errors between them were smaller than 3° when squatting and walking at low speed and smaller than 5° when walking at high speed. Experiments therefore demonstrate the feasibility of the integrated wearable stretch sensors with pants.
ISSN:1687-725X
1687-7268
DOI:10.1155/2020/9231571