Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/4274
標題: 卡門渦列作用驅動之壓電式能量擷取器
Piezoelectric energy harvester based on vibration induced by the Karman Street
作者: 趙家葦
Chao, Chia-Wei
關鍵字: von Ká馮卡門渦列;rmán vortex street;piezoelectric film;PDMS;PVDF;energy harvester;壓電薄膜;PVDF;能量擷取器
出版社: 精密工程學系所
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摘要: 
本文是探討卡門渦列作用驅動之壓電式能量擷取器的機構,此能量擷取器的主要動作方式系由以一穩定的重力流流入流道內,並在流道內橫置一梯形角柱體,藉由水流流過此梯形角柱體而在其後方流場引發卡門渦列作用以產生具有固定頻率之振動。
在分析模擬方面,使用國家高速網路與計算中心(NCHC)所提供的有限分析模擬軟體ABAQUS6.4進行模擬,分析振動薄膜位移量及計算出壓電薄膜輸出電壓。
在製程方面,本研究採用壓克力板組合出流道,以聚二甲基矽氧高分子(Polydimethylsiloxane, PDMS)作為振動薄膜,以偏聚二氟乙烯(Polyvinylidene fluoride, PVDF)壓電薄膜作為振動能轉換為位能之獵能元件。
在量測方面是以光纖位移計得到薄膜振幅,壓電薄膜輸出電壓是以示波器擷取卡來擷取。以壓力感測器量測其障礙物後方壓力。並將量測結果與模擬相比較,證實此概念是可行的。

A piezoelectric energy harvester based on von Kármán vortex street is developed. The energy harvester is actuated by pressure fluctuation generated by the vortex street behind a bluff body in a water flow chamber.
Finite element method was utilized to simulate the displacement of a PDMS diaphragm and the piezoelectric film.
In the fabrication process, acrylic is used as the material for the fluidic channel, polydimethylsiloxane (PDMS) as material of vibration diaphragm, polyvinylidene fluoride (PVDF) as the device to convert vibration energy into electrical power.
The deflection of the diaphragm, output voltage of the PVDF, pressure in the pressure chamber are measured by a laser vibrometer, an oscilloscope and a pressure sensor, respectively. The experimental results are computed with the simulation. The design concept of the energy harvester is verified by the experimental results.
URI: http://hdl.handle.net/11455/4274
其他識別: U0005-3008201023442700
Appears in Collections:精密工程研究所

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