一种“回”字形多方向压电能量收集方法  

A“回”Shaped Multi-Directional Piezoelectric Energy Collection Method

作　　者：荣本阳 李宗伦 朱虎霸 何卓威 杨晶晶[1] RONG Benyang;LI Zonglun;ZHU Huba;HE Zhuowei;YANG Jingjing(School of Civil Aviation and Aviation,Kunming University of Science and Technology,Kunming 650500,China;School of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学民航与航空学院,云南昆明650500 [2]昆明理工大学机电工程学院,云南昆明650500

出　　处：《压电与声光》2024年第3期367-375,共9页Piezoelectrics & Acoustooptics

基　　金：飞行器无线传感网络振动能量收集器的研究(KKSY201765024);昆明理工大学-云南港翊航空技术有限公司产教融合研究生联合培养基地(109920220119)。

摘　　要：该文介绍了一种“回”字形的多方向微型压电振动能量收集装置,其由尺寸为34 mm×2 mm×1 mm的正方形边框包围,内部结构包含4个非对称的组合悬臂梁,主悬臂梁固定于边框内壁,并与z方向垂直,次悬臂梁连接在主悬臂梁的末端质量块上。首先建立基础激励条件下组合悬臂梁振动系统的动力学模型。然后,通过有限元仿真分析对比了不同刚度和质量对位移幅值的影响,验证了组合悬臂梁系统的振动特性,并确定了最佳结构参数值:当主、次悬臂梁厚度均为0.3 mm,主、次质量块的最佳惯性质量分别为619.32 g、342.3 g。经仿真计算得到z方向可输出电能功率为3.1385 mW,x、y方向可输出功率均为0.7205 mW。最后搭建微型能量收集器实验平台,在实际测试中z方向的输出功率为2.85 mW,x、y方向的输出功率均为0.57 mW。This paper introduces a multi-directional miniature piezoelectric vibration energy collection device with a zigzag shape,which is surrounded by a square frame with a size of 34 mm×2 mm×1 mm,and its internal structure consists of four asymmetric combined cantilever beams.The main cantilever beam is fixed on the inner wall of the frame and is perpendicular to the z direction,whereas the secondary cantilever beam is connected to the end mass block of the main cantilever beam.In this study,first,the dynamic model of a composite cantilever beam vibration system under basic excitation is established.Subsequently,through a finite element simulation,the influence of different stiffness and mass values on the displacement amplitude is analyzed and compared,the vibration characteristics of the composite cantilever beam system are verified,and the optimal structural parameters are determined.When the thickness of the primary and secondary cantilever beams is 0.3 mm,the optimal inertial mass of the primary and secondary mass blocks is 619.32 and 342.3 g.The simulation calculation shows that the collectable electric power in the z direction is 3.1385 mW,and the collectable power in the x and y directions is 0.7205 mW.Finally,an experimental platform of a miniature energy collector is built,and in actual testing,the output power in the z direction is 2.85 mW,the output power in the x,y direction is 0.57 mW.

关 键 词：多方向 压电能量收集器 振动能量 悬臂梁 有限元仿真 

分 类 号：TN384[电子电信—物理电子学]