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A force platform for large human displacements.

P Desjardins1, M Gagnon

  • 1Laboratoire de biomécanique, Département de kinésiologie, Université de Montréal, Montréal, Québec, Canada. PierreDenisDesjardins@HotMail.com

Medical Engineering & Physics
|June 20, 2001
PubMed
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This study details a new force platform for measuring ground reaction forces during manual handling tasks. The assembly accurately captures multi-directional forces, crucial for ergonomic and biomechanical analysis.

Area of Science:

  • Biomechanics
  • Ergonomics
  • Human-Computer Interaction

Background:

  • Manual handling tasks pose risks for musculoskeletal injuries.
  • Accurate measurement of ground reaction forces is essential for assessing these risks.
  • Existing force platforms may have limitations in capturing multi-directional forces during dynamic movements.

Purpose of the Study:

  • To present a novel force platform assembly for measuring ground reaction forces.
  • To evaluate the platform's accuracy and natural frequency during dynamic manual handling tasks.
  • To provide a tool for detailed biomechanical analysis of human movement.

Main Methods:

  • Development of a force platform assembly with a vibration absorber.
  • Testing the assembly's natural frequency, achieving 41+/-2 Hz.

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  • Conducting static and dynamic tests to determine measurement accuracy.

    • Main Results:

    • Maximum error of 22 N (2% full scale) during repetitive squat-to-stand movements.
    • Static vertical error of 1.5% (1818+/-33 N) and horizontal error of 4.9% (1177+/-6 N).
    • Platform suitable for measuring magnitude, position, and direction of ground reaction forces.

    Conclusions:

    • The developed force platform assembly is effective for measuring ground reaction forces in manual handling.
    • The incorporation of a vibration absorber enhances the platform's natural frequency.
    • The platform demonstrates acceptable accuracy for biomechanical and ergonomic assessments.