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Updated: Jan 28, 2026

A Polymer-based Piezoelectric Vibration Energy Harvester with a 3D Meshed-Core Structure
Published on: February 20, 2019
Electrostatic MEMS Vibration Energy Harvesters inside of Tire Treads
Yasuyuki Naito1, Keisuke Uenishi2
1Institute for Energy and Material Food Resources, Technology Innovation Division, Panasonic Corporation, Kyoto 619-0237, Japan. naito.yasuyuki@jp.panasonic.com.
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.
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