Uniform Stress Distribution of Bimorph by Arc Mechanical Stopper for Maximum Piezoelectric Vibration Energy Harvesting

Energies

Guangzhao Qin¹  Yun Zhang¹  Junjie Sun¹  Zutang Wu²  Zhuangde Jiang³  Lu Wang³  Ping Yang³  Libo Zhao³  Ryutaro Maeda³  Qian Wang³  Dejiang Lu³  Shuai Liu³ 

[1] Brightstone Innovation (Yantai) Research Institute for Micronano Sensing Technology, Yantai 264006, China;Northwest Institute of Nuclear Technology, Xi’an 710024, China;State Key Laboratory for Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies, Overseas Expertise Introduction Center for Micro/Nano Manufacturing and Nano Measurement Technologies Discipline Innovation, Xi’an Jiaotong University (Yantai) Research Institute for Intelligent Sensing Technology and System, Xi’an Jiaotong University, Xi’an 710049, China;

关键词: piezoelectric;    energy harvesting;    uniform stress distribution;    mechanical ARC stopper;   

DOI  :  10.3390/en15093268

来源: DOAJ

【 摘 要 】

To convert as much vibration energy as possible into electrical energy, the design of a high-performance piezoelectric vibration energy harvester (PVEH) has been studied widely in recent years. To overcome the low energy utilization of a traditional piezoelectric cantilever by inhomogeneous strain, a uniform stress distribution of bimorph by an ARC mechanical stopper structure has been designed for maximum piezoelectric vibration energy harvesting. Deflection equations and their simulation at the first-order modal of two classic bimorph cantilever beam models, with transverse tip force and with equal curvature, are derived based on the Euler–Bernoulli beam assumption. Piezoelectric energy from a beam model with equal curvature is four times that of a cantilever beam model with transverse tip force at the theoretical level. The nonlinear frequency response performance of bimorphs by an ARC mechanical stopper and point stopper model could be observed by the numerical simulations of the lumped parameter electromechanical model. PVEH prototypes were manufactured by 3D printing and tested. To verify the high-power generation capacity, PVEH with an ARC stopper has 1.756 times more voltage than that of a PVEH with a point stopper.

【 授权许可】

Unknown