轮胎胎面内的静电 MEMS 振动能量收集器。

Electrostatic MEMS Vibration Energy Harvesters inside of Tire Treads.

机构信息

Institute for Energy and Material Food Resources, Technology Innovation Division, Panasonic Corporation, Kyoto 619-0237, Japan.

Department of Management of Industry and Technology, Graduate of School of Engineering, Osaka University, Osaka 561-0871, Japan.

出版信息

Sensors (Basel). 2019 Feb 21;19(4):890. doi: 10.3390/s19040890.

DOI:10.3390/s19040890

PMID:30795502

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6412992/

Abstract

An electret electrostatic MEMS vibration energy harvester for tire sensors mounted inside of the tire tread is reported. The device was designed so as to linearly change an electrostatic capacitance between the corrugated electret and output electrode according to the displacement of the proof mass. The electromechanical linearity was effective at reducing the power loss. The output power reached 495 μW under sinusoidal vibration despite the footprint size being as small as 1 cm². Under impact vibration inside of the tire tread, the output power reached 60 μW at a traveling speed of 60 km/h. It was revealed that a higher mechanical resonance frequency of the harvester adjusted within the frequency band of a low-power spectral density of impact vibration acceleration was effective for high efficiency harvest impact vibration energy.

摘要

本文报道了一种用于安装在轮胎胎面内部的轮胎传感器的驻极体静电 MEMS 振动能量收集器。该器件的设计目的是根据质量块的位移线性改变波纹驻极体和输出电极之间的静电容。机电线性度可有效降低功率损耗。尽管有效面积只有 1cm²，但在正弦振动下，输出功率达到了 495μW。在轮胎胎面内的冲击振动下，在 60km/h 的行驶速度下，输出功率达到了 60μW。结果表明，在冲击振动加速度的低功率谱密度频带内调整更高的机械共振频率对于高效采集冲击振动能量是有效的。