The fatigue behavior study of micro piezoelectric energy harvester under different working temperature

Y. C. Kuo; J. T. Chien; W. T. Shih; C. T. Chen; S. C. Lin; W. J. Wu

doi:10.1117/12.2514427

21 March 2019 The fatigue behavior study of micro piezoelectric energy harvester under different working temperature

Y. C. Kuo, J. T. Chien, W. T. Shih, C. T. Chen, S. C. Lin, W. J. Wu

Proceedings Volume 10967, Active and Passive Smart Structures and Integrated Systems XIII; 109672H (2019) https://doi.org/10.1117/12.2514427
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

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.

Conference Presentation

Citation Download Citation

Y. C. Kuo, J. T. Chien, W. T. Shih, C. T. Chen, S. C. Lin, and W. J. Wu "The fatigue behavior study of micro piezoelectric energy harvester under different working temperature", Proc. SPIE 10967, Active and Passive Smart Structures and Integrated Systems XIII, 109672H (21 March 2019); https://doi.org/10.1117/12.2514427

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