A Novel Quarter-Circular Arc Multi-Direction Piezo electric VEH and Its Theoretical Model

• 作者: ZHU Yucheng HU Jiayang BAI Yunshan ZHAO Jiang JI Xincun WANG Debo
• 来源期刊: 电子学报（英文）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: MICROWAVE AND ELECTRONIC SYSTEM ENGINEERING
• 页码范围: 185-191
• 页数: 7页
• 语种: 英文
• DOI: 10.1049/cje.2020.12.003

摘要

A quarter-circular arc piezoelectric Vibra-tion energy harvester (VEH) based on nonlinear geometry is proposed with both bending moment and torque deformation mode, so it can effectively absorb multi-directional vibration at the same resonance frequency. The theoretical model of quarter-circular arc piezoelectric VEH is established to study the resonance frequency and the output voltage. In order to demonstrate multi-directional performance of the quarter-circular arc VEH, the stress distribution is compared with that of the traditional piezoelectric VEH in multi-direction vibration, and the output voltage of the circular arc piezoelectric VEH are relatively increased 267.26％ in X-direction, 463.18％ in Y-direction, and 17.24％ in Z-direction. The external load is equipped in circuit to measure output power, whose matching resistance is around 21k?, and the maximum output powers are 7.57mW in X-direction, 2.39mW in Y-direction, and 9.93mW in Z-direction.