title: Power harvesting using PZT ceramics embedded in orthopedic implants.
abstract: Battery lifetime has been the stumbling block for many power-critical or maintenance-free real-time embedded applications, such as wireless sensors and orthopedic implants. Thus a piezoelectric material that could convert human motion into electrical energy provides a very attractive solution for clinical implants. In this work, we analyze the power generation characteristics of stiff lead zirconate titanate (PZT) ceramics and the equivalent circuit through extensive experiments. Our experimental framework allows us to explore many important design considerations of such a PZT-based power generator. Overall we can achieve a PZT element volume of 0.5 x 0.5 x 1.8 cm, which is considerably smaller than the results reported so far. Finally, we outline the application of our PZT elements in a total knee replacement (TKR) implant.
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
authors.forename: Ming
authors.initials: M
authors.lastname: Liu
authors.forename: Chen
authors.initials: C
authors.lastname: Jia
authors.forename: Zihua
authors.initials: Z
authors.lastname: Wang
mesh_terms: D001674:Bioelectric Energy Sources; D002516:Ceramics; D004574:Electromagnetic Fields; D004867:Equipment Design; D006801:Humans; D007720:Knee Prosthesis; D007854:Lead; D019736:Prostheses and Implants; D013314:Stress, Mechanical; D014025:Titanium; D015040:Zirconium
chemical_list: C065536:lead titanate zirconate; D007854:Lead; D015040:Zirconium; D014025:Titanium