Effects of Orientations on Efficiency of Energy Harvesting from Heart Motion Using Ultrathin Flexible Piezoelectric Devices
Effects of Orientations on Efficiency of Energy Harvesting from Heart Motion Using Ultrathin Flexible Piezoelectric Devices
复制标题
方向对使用超薄柔性压电器件从心脏运动采集能量的效率的影响
DOI：
10.1002/adts.201900050
复制
发表时间：
2019-07-01
影响因子：
3.3
通讯作者：
Wang, Ji
中科院分区：
文献类型：
--
作者：
Zhang, Yangyang;Lu, Chaofeng;Wang, Ji
Harvesting biomechanical energy from the heart motion with flexible piezoelectric transducers to power implantable devices has attracted much attention in recent years. In vivo animal experiments have shown that the output power of flexible device depends heavily on the patching orientations. In this paper, an electromechanical model with the effects of myocardial fiber is developed to better understand the underlying mechanism of this phenomenon and therefore to choose optimal patching orientations for energy harvesting. Theoretical output voltage of the piezoelectric energy harvester under the heart motion in one cardiac cycle is calculated, and the voltage amplitudes of the harvester with varied patching orientations are compared with the experimental measurements. It is found that the output voltage amplitudes are generally the cosine function of the angle between patching orientation of the piezoelectric energy harvesters (PEHs) and the fiber orientation of the epicardium. The results may serve as a guideline to determine the optimal patching orientation of flexible PEHs mounted on surfaces of fiber structure.
