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- W2014171030 endingPage "085025" @default.
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- W2014171030 abstract "This paper presents the results of a piezoelectric circular diaphragm harvester utilising a unique measurement setup with tailored input force (walk profile), adjustable mechanical pre-stress, and simultaneous measurement of the harvested energy output and input force pressure. The harvester, incorporating the pre-stressing mechanism, consisted of a 191 μm thick PZ-5A piezoelectric disc (Ø 34.5 mm) and a 100 μm thick steel plate (Ø 45.5 mm). Its performance was measured with pressure cycles at a frequency of 0.96 Hz. Harvested energy was measured as a function of the pre-stressing state, the applied force, and the pressure profile. The optimal bending pre-stress was found to improve the efficiency of harvesting by ∼141% compared to the case without pre-stress. The maximum obtained efficiency was 14.7%, and the maximum average power density of 6.06 mW cm−3 was measured for a unimorph diaphragm energy harvester. The results show that the pre-stressing technique is an effective method to improve the efficiency and generated power in this type of piezoelectric harvester, potentially enabling it to power different portable devices and sensors in future applications." @default.
- W2014171030 created "2016-06-24" @default.
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- W2014171030 date "2014-07-02" @default.
- W2014171030 modified "2023-09-26" @default.
- W2014171030 title "Piezoelectric circular diaphragm with mechanically induced pre-stress for energy harvesting" @default.
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- W2014171030 doi "https://doi.org/10.1088/0964-1726/23/8/085025" @default.
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