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Design Study on Customised Piezoelectric Elements for Energy Harvesting in Total Hip Replacements

Author

Listed:
  • Hans-E. Lange

    (Department of Orthopaedics, Rostock University Medical Center, 18057 Rostock, Germany)

  • Rainer Bader

    (Department of Orthopaedics, Rostock University Medical Center, 18057 Rostock, Germany)

  • Daniel Kluess

    (Department of Orthopaedics, Rostock University Medical Center, 18057 Rostock, Germany)

Abstract

Energy harvesting is a promising approach to power novel instrumented implants that have passive sensory functions or actuators for therapeutic measures. We recently proposed a new piezoelectric concept for energy harvesting in total hip replacements. The mechanical implant safety and the feasibility of power generation were numerically demonstrated. However, the power output for the chosen piezoelectric element was low. Therefore, we investigated in the present study different geometry variants for an increased power output for in vivo applications. Using the same finite element model, we focused on new, customised piezoelectric element geometries to optimally exploit the available space for integration of the energy harvesting system, while maintaining the mechanical safety of the implant. The result of our iterative design study was an increased power output from 29.8 to 729.9 µW. This amount is sufficient for low-power electronics.

Suggested Citation

  • Hans-E. Lange & Rainer Bader & Daniel Kluess, 2021. "Design Study on Customised Piezoelectric Elements for Energy Harvesting in Total Hip Replacements," Energies, MDPI, vol. 14(12), pages 1-13, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:12:p:3480-:d:573518
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    References listed on IDEAS

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    1. Daniel Kluess & Ehsan Soodmand & Andrea Lorenz & Dieter Pahr & Michael Schwarze & Robert Cichon & Patrick A. Varady & Sven Herrmann & Bernhard Buchmeier & Christian Schröder & Stefan Lehner & Maeruan , 2019. "A round-robin finite element analysis of human femur mechanics between seven participating laboratories with experimental validation," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 22(12), pages 1020-1031, September.
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