自调谐全方向振动能量收集装置的设计及优化  

Design and Optimization of Self-tuning Omnidirectional Vibration Energy Harvester

作　　者：张旭辉[1] 吴中华[1] 邓鹏飞[1] 赖正鹏 

机构地区：[1]西安科技大学机械工程学院,陕西西安710054

出　　处：《压电与声光》2016年第6期915-919,共5页Piezoelectrics & Acoustooptics

基　　金：陕西省教育厅专项科研计划基金资助项目(14JK1473);陕西省博士后科研项目一等基金资助项目(陕人社函〔2014〕907号-201406);中国博士后科学基金面上基金资助项目(2015M582692)

摘　　要：为解决现有振动能量收集装置单方向收集及收集效率低等问题,该文设计了一种自调谐全方向振动能量收集装置,通过多场耦合方式改变装置的振动特性,提高能量转换效率。建立了装置横向和纵向振动模型,分析了横向和纵向振动的动力学特性。利用有限元分析对结构参数进行优化,得到结构参数与谐振频率的关系。最后,搭建实验平台。通过实验表明,能量收集装置的谐振频率随组合悬臂梁宽度和厚度的增大而增大,当选取组合悬臂梁宽10mm、厚1mm,外界激振力1.5N时,谐振频率为16.47Hz,峰值电压为9.67V,且在各个方向均能产生有效输出电压。Aiming at the problems of the single direction and low efficiency collection of the existing vibration energy collecting device, a kind of self-coordination omni-directional vibration energy collecting device is designed in this article. The vibration characteristics of the device are changed through the coupled multiple fields, so as to improve the energy conversion efficiency. The horizontal and vertical vibration model of device has been established, and the dynamic characteristics of all directions vibration have been analyzed. The structural parameters have been optimized by using the finite elements analysis. Then the relationship between the structure parameters and the resonant frequency has been obtained. Finally, the experimental platform for self-coordination omnidirectional vibration energy collecting device has been set up. The experiments show that the resonant frequency increases with the enlargement of width and thickness of composite cantilever beam in energy collecting device. The resonance frequency is 16.47 Hz, and the peak voltage is 9.67 V when the composite cantilever beam width of 10 mm, the thickness of 1 mm as well as the vibration force of 1.5 N are selected. And it can produce effective output voltage in all directions.

关 键 词：全方向俘能器 振动能量收集 多场耦合 有限元分析 优化设计 

分 类 号：TN384[电子电信—物理电子学]