Browsing by Author "W. Donkrajang"

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    Development of a wireless electronic shoe for walking abnormalities detection
    (2012-12-01) W. Donkrajang; N. Watthanawisuth; J. P. Mensing; T. Kerdcharoen; Mahidol University; Thailand National Electronics and Computer Technology Center
    This work portrays the development of wireless smart shoe for gait analysis. Force sensitive resistors (FSRs) and resistive bend sensor were employed by mounting onto a shoe for detection of pressure distribution beneath the foot during normal and abnormal walking. In the present study, we have been interested in 3 walking postures including normal walking, tip-toe walking and dragging foot walking. Wireless sensor network (WSN) based on ZigBee technology was employed in this work for data communication. The Principal component analysis (PCA) was used for pattern recognition in the analysis part. It was shown that the smart shoe was successful to classify between normal gait pattern and some abnormal gait patterns. ©2012 IEEE.
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    A wireless networked smart-shoe system for monitoring human locomotion
    (2011-12-01) W. Donkrajang; N. Watthanawisuth; J. P. Mensing; T. Kerdcharoen; Mahidol University; Thailand National Electronics and Computer Technology Center
    This paper presents the development of a low cost wireless data shoe system for monitoring human locomotion. The sensor unit consists of 3 force sensing resistors (denoted by FSR located at ball, lateral border and heel) and 3-axis acceleration sensor (ADXL335). Pressure and acceleration data were sampled at 10 Hz, which is sufficient for various activities such as sitting, standing, walking and possibly for running. The data from these sensors were sent to a base station (via ZigBee wireless network) connected to a personal computer. Experimental results show a clear discrimination of patterns between static and dynamic postures. In addition, we can detect some gait phase from walking sample data which can be used for analysis of healthy gait behavior. © 2011 IEEE.