Optimal patching locations and orientations for maximum energy harvesting efficiency of ultrathin flexible piezoelectric devices mounted on heart surface  

作　　者：Yangyang Zhang Ji Wang Chaofeng Lü 

机构地区：[1]Faculty of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China [2]College of Civil Engineering and Architecture,Soft Matter Research Center,and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province,Zhejiang University,Hangzhou 310058,China

出　　处：《Theoretical & Applied Mechanics Letters》2022年第3期178-183,共6页力学快报（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.11902168);the Technology Innovation 2025 Program of Municipality of Ningbo(Grant No.2019B10222);the National Natural Science Foundation of China(Grant No.11925206).

摘　　要：Flexible piezoelectric energy harvesters(PEHs)have gained lots of attention in recent years,because of their potential biomechanical applications,such as powering implantable devices.Several in vivo animal experiments have demonstrated that the output power of a flexible PEH varies remarkably with patching orientations and locations,but the underlying mechanism remains unclear yet.Herein,an electromechanical model for a flexible PEH installed on a beating heart is proposed,and a concise relationship between the output power of the device and myocardium strain is established.The results demonstrate that the patching orientations have a significant impact on the output power of the PEH,and the optimal patching orientations for all patching locations are approximately 15–20 degree for PEHs mounted on the left ventricle.The simple theoretical method provided here would be universally effective for choosing the optimal patching locations and orientations of flexible PEHs installed on a nonhomogeneous deformed surface.

关 键 词：Biomechanical energy harvester Flexible electronics Heart motion Myocardial strain 

分 类 号：TH77[机械工程—仪器科学与技术]