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Instrumented parallel bars for three-dimensional force measurement.

Z Jin1, H J Chizeck

  • 1Department of Systems Engineering, Case Western Reserve University, Cleveland, OH 44106.

Journal of Rehabilitation Research and Development
|January 1, 1992
PubMed
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Researchers modified parallel bars to measure 3D forces, aiding the development of functional electrical stimulation (FES) devices for paralyzed patients. This technology helps evaluate and improve FES systems for standing and gait restoration.

Area of Science:

  • Rehabilitation Engineering
  • Biomechanics
  • Neuroprosthetics

Background:

  • Restoring mobility for paralyzed individuals is a significant challenge.
  • Functional Electrical Stimulation (FES) shows promise for enabling standing and gait.
  • Objective evaluation of FES systems requires precise measurement of patient-device interaction.

Purpose of the Study:

  • To describe the modification and instrumentation of standard parallel bars for 3D force measurement.
  • To present a system for evaluating Functional Electrical Stimulation (FES) devices.
  • To facilitate the optimization of FES control strategies for paralyzed patients.

Main Methods:

  • Standard parallel bars were instrumented to measure forces in three dimensions.
  • A real-time measurement system was developed to capture upper body forces applied to the bars.

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  • The system was utilized in the context of developing and evaluating FES devices.

    • Main Results:

    • The modified parallel bars provide a means to quantify forces exerted by patients during FES-assisted movements.
    • Real-time force data allows for immediate feedback on the effectiveness of FES stimulation patterns.
    • The system enables objective assessment of patient interaction with the parallel bars.

    Conclusions:

    • Instrumented parallel bars offer a valuable tool for assessing FES systems.
    • Force measurement data can guide the redesign of FES stimulation patterns and controllers.
    • This technology contributes to advancing FES-based rehabilitation for paralysis.