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Related Experiment Videos

A new versatile hand dynamometer.

Darius Chapman1, Nicola Massy-Westropp, Trevor C Hearn

  • 1School of Informatics & Engineering, Flinders University, South Australia.

Australasian Physical & Engineering Sciences in Medicine
|April 21, 2006
PubMed
Summary

This study presents a portable hand strain-gauge dynamometer for measuring grip strength up to 800N. Its design ensures accuracy regardless of force application point, enhancing usability for grip strength assessment.

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Area of Science:

  • Biomechanics
  • Medical instrumentation
  • Human factors engineering

Background:

  • Accurate grip strength measurement is crucial for diagnosing neuromuscular disorders and assessing rehabilitation progress.
  • Existing dynamometers may lack portability or consistency in force application measurement.

Purpose of the Study:

  • To design and validate a novel, portable hand strain-gauge dynamometer.
  • To ensure the dynamometer is independent of the point of grip force application.
  • To integrate the device with a personal digital assistant (PDA) for enhanced portability.

Main Methods:

  • Strain-gauge technology was employed for force sensing.
  • Finite element modeling (FEM) was utilized to analyze mechanical behavior.
  • Experimental testing was conducted to verify performance and accuracy.

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Main Results:

  • The developed dynamometer measures grip strengths ranging from 12.5 to 800 Newtons (N).
  • The design demonstrated independence from the point of force application.
  • Successful integration with a PDA was achieved, confirming full portability.

Conclusions:

  • The novel hand dynamometer offers a portable and accurate solution for grip strength assessment.
  • The device's independence from force application point enhances reliability.
  • Integration with PDAs facilitates widespread clinical and research applications.