针对波浪能收集的多模态振动能量收集器  

Multi-modal vibration energy harvester for wave energy harvesting

作　　者：焦冲 邓华夏 马孟超[1] 钟翔 JIAO Chong;DENG Huaxia;MA Mengchao;ZHONG Xiang(School of Instrument Science and Opto-electronics Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;Department of Modern Mechanics,University of Science and Technology of China,Hefei 230026,Anhui,China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院,安徽合肥230009 [2]中国科学技术大学近代力学系,安徽合肥230026

出　　处：《实验力学》2022年第2期152-160,共9页Journal of Experimental Mechanics

基　　金：国家自然科学基金(No.11872167);安徽省自然科学基金杰出青年基金(No.1908085J15)。

摘　　要：波浪能源作为一种可持续的能源一直备受关注,但是由于波浪能的低带宽特性和多方向特性,使得波浪能的收集非常困难。为了在多个方向上实现宽带波浪能的收集并提高发电效率,本文提出一种使用十字梁结构的多模态振动能量收集器,并与基于液态金属的摩擦电装置相结合,使得装置具有多峰特性和高发电效率,从而实现了多个方向上宽频振动能量的有效收集。多个方向的对比实验表明,该装置不仅具有多方向能量收集的能力,而且可以在全频带的扫描范围内工作。在水平激励下,与传统的单模态振动能量收集器相比,该装置的峰值功率密度增加到10倍,工作带宽增加到6.25倍。实验结果表明,该装置显著提高了低带宽多向能量采集的效率,为波浪能收集提供了一种新的方法。Wave energy has attracted great attentions as a sustainable energy source. However, due to the low bandwidth and multi-directional characteristics of wave energy, the harvesting of wave energy is difficult. This paper proposes a multi-modal vibration energy harvesting device using the cross beam structure, and combining it with a triboelectric device based on liquid-metal. This device has multi-modal and high power generation efficiency, thereby it can realize the effective harvesting of broadband vibration energy in multiple directions. Comparative experiments in multiple directions show that the device not only has the ability to harvest energy in multiple directions, but it can even work in the scanning range of the full frequency band. Under horizontal excitation, compared with the traditional single-mode vibration energy harvesting device, the peak power density of the device is increased to 10 times, and the working bandwidth is increased to 6.25 times. Experimental results show that the multi-modal device significantly improves the efficiency of low-bandwidth multi-directional energy harvesting, and provides a new method for wave energy harvesting.

关 键 词：低宽频 多方向 多模态 波浪能 振动能量收集 

分 类 号：TH703[机械工程—仪器科学与技术]