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https://doi.org/10.3390/s140815434
Title: | Estimation of spatial-temporal gait parameters using a low-cost ultrasonic motion analysis system | Authors: | Qi, Y Soh, C.B Gunawan, E Low, K.-S Thomas, R |
Keywords: | Cost benefit analysis Gait analysis Medical applications Motion analysis Ultrasonic applications Ultrasonic sensors Wireless sensor networks Gait kinematics Healthy volunteers Measurement accuracy Motion analysis system Positioning techniques Spatial temporals Unscented Kalman Filter Walking assessments Parameter estimation |
Issue Date: | 2014 | Publisher: | MDPI AG | Citation: | Qi, Y, Soh, C.B, Gunawan, E, Low, K.-S, Thomas, R (2014). Estimation of spatial-temporal gait parameters using a low-cost ultrasonic motion analysis system. Sensors (Switzerland) 14 (8) : 15434-15457. ScholarBank@NUS Repository. https://doi.org/10.3390/s140815434 | Rights: | Attribution 4.0 International | Abstract: | In this paper, a low-cost motion analysis system using a wireless ultrasonic sensor network is proposed and investigated. A methodology has been developed to extract spatial-temporal gait parameters including stride length, stride duration, stride velocity, stride cadence, and stride symmetry from 3D foot displacements estimated by the combination of spherical positioning technique and unscented Kalman filter. The performance of this system is validated against a camera-based system in the laboratory with 10 healthy volunteers. Numerical results show the feasibility of the proposed system with average error of 2.7% for all the estimated gait parameters. The influence of walking speed on the measurement accuracy of proposed system is also evaluated. Statistical analysis demonstrates its capability of being used as a gait assessment tool for some medical applications. © 2014 by the authors; licensee MDPI, Basel, Switzerland. | Source Title: | Sensors (Switzerland) | URI: | https://scholarbank.nus.edu.sg/handle/10635/180140 | ISSN: | 1424-8220 | DOI: | 10.3390/s140815434 | Rights: | Attribution 4.0 International |
Appears in Collections: | Staff Publications Elements |
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