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Related Experiment Videos

A microprocessor-based data-acquisition system for measuring plantar pressures from ambulatory subjects.

H S Zhu1, G F Harris, J J Wertsch

  • 1Rehabilitation Medicine Service, VA Medical Center, Milwaukee, MI 53295.

IEEE Transactions on Bio-Medical Engineering
|July 1, 1991
PubMed
Summary

A new portable system accurately measures plantar pressures inside shoes during walking. This wearable technology enhances data collection for gait analysis and foot health research.

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Area of Science:

  • Biomechanics
  • Biomedical Engineering
  • Wearable Technology

Background:

  • Accurate measurement of plantar pressure is crucial for understanding foot biomechanics and diagnosing conditions.
  • Existing commercial systems often lack portability, accuracy, and flexibility for real-world ambulatory measurements.

Purpose of the Study:

  • To develop and validate a portable microprocessor-based data-acquisition system for measuring discrete plantar pressures within footwear.
  • To offer an improved solution with enhanced accuracy, repeatability, portability, and flexibility compared to current systems.

Main Methods:

  • Development of a system with 14 conductive polymer pressure sensors embedded in insoles, 14 analog amplifiers, an 8-bit analog-to-digital converter, and a microprocessor.
  • The system includes 120 kbytes of memory and a parallel I/O interface, capable of sampling 14 channels at 20 Hz for 7 minutes.

Related Experiment Videos

  • Data acquisition from ambulatory subjects with sensors placed at key foot locations (heel, metatarsal heads, hallux).

    • Main Results:

    • Successful acquisition of foot pressure data from a sensate subject during multiple walking trials.
    • Demonstrated capability for continuous sampling of 14 pressure channels.
    • The developed system provides accurate and repeatable plantar pressure measurements.

    Conclusions:

    • The portable microprocessor-based system effectively measures discrete plantar pressures within shoes during ambulation.
    • This technology represents a significant advancement over existing commercial systems, offering enhanced performance for gait and foot pressure analysis.
    • The system holds potential for various applications in clinical settings, sports science, and biomechanical research.