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Powering biomedical devices with body motion.

Edwar Romero1, Robert O Warrington, Michael R Neuman

  • 1Mechanical Engineering Department, University of Turabo, Gurabo, PR 00778, USA. eromero@suagm.edu

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Summary
This summary is machine-generated.

Harnessing energy from body motion can power miniature biomedical devices, potentially eliminating battery replacement surgeries. Ankle and knee motion during walking generates significant power, with running yielding even higher outputs.

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Area of Science:

  • Biomedical Engineering
  • Wearable Technology
  • Energy Harvesting

Background:

  • Miniature electronic biomedical devices require reliable power sources.
  • Current battery-powered devices necessitate frequent surgical replacement.
  • Energy harvesting from human motion offers a sustainable alternative.

Purpose of the Study:

  • To evaluate power generation potential from body motion at various locations and speeds.
  • To assess the feasibility of using harvested energy for biomedical devices.
  • To develop and test a prototype energy harvesting device.

Main Methods:

  • Conducted treadmill tests with 11 healthy subjects measuring accelerations at multiple body locations.
  • Estimated available power based on acceleration magnitude and frequency.
  • Designed and tested an axial flux miniature electric dynamo for power generation.

Main Results:

  • Walking generated over 0.5 mW/cm(3) at all locations, exceeding 10 mW/cm(3) at the ankle and knee.
  • Running produced at least 10 times more power than walking.
  • A 2 cm(3) prototype dynamo generated 117 microW on the ankle during walking.

Conclusions:

  • Body motion, particularly at the lower extremities, is a viable energy source for biomedical devices.
  • Energy harvesting technology can reduce or eliminate the need for battery replacement surgeries.
  • The developed dynamo prototype demonstrates practical power generation capabilities for wearable applications.