Journal of Biomechanics
Volume 38, Issue 5 , Pages 1185-1190, May 2005

Performance of orientation sensors for use with a functional electrical stimulation mobility system

  • Scott Simcox

      Affiliations

    • Rehabilitation Research Centre, The University of Sydney, Australia
    • Corresponding Author InformationCorresponding author. University of Sydney, Faculty of Health Science, P.O. Box 170, Lidcombe, NSW 2141, Australia. Tel.: +61-2-9351-9650; fax: +61-2-9351-9977
    • ,
  • Simon Parker

      Affiliations

    • Neopraxis Pty. Ltd., Lane Cove, Australia
    • ,
  • Glen M Davis

      Affiliations

    • Rehabilitation Research Centre, The University of Sydney, Australia
    • ,
  • Richard W Smith

      Affiliations

    • School of Exercise and Sports Science, The University of Sydney, Australia
    • ,
  • James W Middleton

      Affiliations

    • Rehabilitation Studies Unit, Department of Medicine, The University of Sydney, Australia

Accepted 25 May 2004. published online 19 August 2004.

Abstract 

The purpose of this study was to verify the performance of recently developed body-worn sensor packs against 3D motion analysis of trunk and lower-limb movements. Five sensor packs, each consisting of rate gyroscope and two 2-D accelerometers controlled by a microprocessor were attached to the trunk, thighs, and shanks of an able bodied subject. A 6-camera motion analysis system (MAS) recorded multiple trials of sit-to-stand movements and normal walking. Time domain signals from each sensor pack were significantly correlated (r=0.90–0.99;p<0.05) with a root mean square errors of less than 5° when compared against the same limb angle measurements calculated by the MAS. These data demonstrate that these external sensor packs are accurate devices for measuring trunk and lower-limb sagittal plane orientation in real-time.

Keywords:  Sensors, Gyroscope, Accelerometer, Kinematics, Closed-loop control

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PII: S0021-9290(04)00266-0

doi:10.1016/j.jbiomech.2004.05.026

Journal of Biomechanics
Volume 38, Issue 5 , Pages 1185-1190, May 2005

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