基于旋转运动的负泊松比结构压电俘能器设计与研究  

Design and study of piezoelectric energy harvester with an auxetic structure based on rotational motion

作　　者：李文彬[1] 时岩[1] 陆亚平 高强 Li Wenbin;Shi Yan;Lu Yaping;Gao Qiang(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;School of Mechanical Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]东南大学机械工程学院,江苏南京211189

出　　处：《南京理工大学学报》2025年第1期104-112,共9页Journal of Nanjing University of Science and Technology

摘　　要：针对智能轮胎技术所面临的无线传感器供能问题,提出了一种可用于轮胎自供能的负泊松比结构压电俘能器。基于欧拉-拉格朗日理论,建立了轮胎旋转激励下包含离心力和重力的负泊松比压电悬臂梁动力学模型。分析了负泊松比结构和平板结构的静力学性能及最佳负载,并通过数值分析和试验对负泊松比结构和平板结构的电压和输出功率进行研究,揭示了输出电压随转速变化的规律。数值结果表明:负泊松比结构的压电俘能器比平板结构压电俘能器俘能效率明显提高,峰值电压提高了41.23%,峰值功率提升了139.14%,工作带宽增大了54.55%。Aiming at the wireless sensor energy supply ploblem faced by smart tire technology,a piezoelectric energy harvester with auxetic structure that can be used for tire self-power supply is proposed.Based on the Euler-Lagrange theory,an auxetic structure piezoelectric cantilever beam dynamics model containing centrifugal force and gravity under tire rotation excitation is established.The static performance and optimal loads of the auxetic structure and flat plate structure are analyzed,and the voltage and output power of the auxetic structure and the flat plate structure are studied by numerical analysis and test,and the law of output voltage variation with speed is revealed.The experimental results show that the energy harvesting efficiency of piezoelectric energy harvester with auxetic structure is significantly improved compared with that of the piezoelectric energy harvester with flat plate structure,and the peak voltage is increased by 41.23%;the peak power is increased by 139.14%;and the working bandwidth is increased by 54.55%.

关 键 词：俘能器 负泊松比结构 旋转运动 压电悬臂梁 

分 类 号：TK9[动力工程及工程热物理]