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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57414
標題: | 靜電式液氣排流能量擷取器 Electrostatic Power Harvester using a Liquid-Gas Flow Array |
作者: | Meng-Yang Hsieh 謝孟洋 |
指導教授: | 張培仁 |
關鍵字: | 微機電,能量擷取,靜電,微流道,兩相流,T型管, MEMS,Power Harvesting,Electrostatics,Micro-channel,Liquid-gas flow,PDMS,T-shaped, |
出版年 : | 2014 |
學位: | 碩士 |
摘要: | 近年來,由於生態環境的監測、災害預警系統的構建及智慧型生活空間的發展,多點分佈無線監測網路的佈置已成必然。然而,成熟的無線通訊技術和低功率消耗電路的發展,使得感測器的用電量大幅降低。且許多微機電系統結構與遠紅外線裝置因有電池更換不易、使用壽命不長等問題。故期望能夠將這些裝置整合為自給供電裝置。
本論文為使用微機電製程技術研製一能將環境機械能轉換為電能之靜電式微型能量擷取器,此擷取器由高250μm的微流道並且在流道中有排列的液氣流所組成。本靜電式能量擷取器利用機械能轉換成電能,所以前端設計一可以產生整齊排列液氣流之T型管結構,並且考量到需要置入鞋子中,所以必須要是可饒式的基板,所以在這邊採用PDMS當作上下基板,在流道中間鍍上電極來作為平行板電容之應用,加上後端有一大型可壓式腔體作為人走路時機械力量所壓。實驗量測結果得此能量擷取器單根電極在電極面積為2cm×1mm時、外加電壓為5V、最佳阻抗為120kΩ時,有最佳平均輸出功率2.78μW輸出,多根電極在流速在4mm/sec時有良好的排列情形,液氣流長度大約在5-7mm,平均輸出功率為5.52pW,隨著流速增加功率也會增加,平均功率也會提高。而平行板電容靜電式能量擷取之理論推導,亦展現在本論文研究中。 Enabling technologies for wireless sensor networks have gained considerable attention in research communities over the past few years. With the development of the low powered small wireless electronic devices, it is highly desirable, even necessary in certain situations, for wireless sensor nodes to be self-powered. In this work, Electrostatic power harvester using a liquid-gas flow array has been developed. The harvester is combined with 250μm micro-channel and arranged liquid-gas flow in channel. The Electrostatic power harvester converts mechanical energy to electrical energy. The front-end design of T-shaped structure can generate liquid-gas flow, and considering the need to put into shoes, the substrate shall be flexible. Using PDMS as substrate, patterning electrode in micro-channel as parallel plate capacitor, the back-end design of a chamber can be pressed by mechanical force. With the present power harvester, average power 2.78μW is obtained at bias voltage 5V, resistance 120kΩ, single electrode area 2cm×1mm. Multi-electrode harvester has gas and liquid depth 5-7mm at velocity 4mm/sec, and produce average power 5.52pW. Multi-electrode harvester gained more power as velocity increasing. The theory of the parallel plate capacitor power harvester model is also presented. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57414 |
全文授權: | 有償授權 |
顯示於系所單位: | 應用力學研究所 |
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ntu-103-1.pdf 目前未授權公開取用 | 4.78 MB | Adobe PDF |
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