The fatigue behavior study of micro piezoelectric energy harvester under different working temperature
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Journal Volume
10967
ISBN
9781510625891
Date Issued
2019-01-01
Author(s)
Abstract
The cantilever beam type of PEH (piezoelectric energy harvester) has been widely studied for years due to simple design and effectively generate high strain and high ouput power. In our previously researches, the PEH unit with area of 6 mm by 9 mm has output performance around 300 μW under base excitation of 0.5g acceleration level. Moreover, we have designed the tapered shape cantilever beam of PEH for optimizing the beam strain distribution and verified that the output performance and durability are not inferior to rectangular one we have fabricated before. In this study, the tapered shape cantilever beam PEHs are chosen for durability experiment to investigate the relevance among output performance, fatigability and mechanical properties of devices with a long-term working period under different working temperature. The result evidently shows the durability difference when the device is operated under high temperature (50°C) with significant natural frequency drop and the PEH could not maintain constant power output.
Subjects
beam shape | energy harvester | fatigue | piezoelectric | temperature
SDGs
Type
conference paper