题目/Title：Power Harvesting Using PZT Ceramics Embedded in Orthopedic Implants

作者/Author：
                        Hong Chen,Ming Liu,Chen Jia,Zhihua Wang

期刊/Journal：IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control

年份/Issue Date：2009Sept.

卷（期）及页码/Volume（No.）&pages：Vol.56, No.9, pp. 2010 - 2014

摘要/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 times 0.5 times 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.