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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/69292


    Title: 微粒子於溶液中操控之模擬
    Authors: 王皓霆;Wang,Hao-ting
    Contributors: 機械工程學系
    Keywords: 空氣透鏡;聲阻抗匹配;菲涅爾半波;多聚焦;Acoustic tweezer;Acoustic impedance;Fresnel half-wave zoom;Multi-focusing
    Date: 2015-11-17
    Issue Date: 2016-01-05 19:03:16 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文主要針對以聲波操控溶液中粒子來進行各種模擬討論,利用聲波聚焦透鏡之差異,在環境中,產生能量局部的低點,或稱聲勢阱,使粒子趨向此區,進而達到捉取、與控制之功能。相較舊式聲波聚焦元件,如聲懸浮器、指叉狀的表面駐波設計,本論文之技術,不需使用到兩個換能器兩兩搭配使用,只需單個元件搭配透鏡薄膜,所以實驗架設會相對精簡。
    元件設計上,本論文參照空氣透鏡、聲阻抗匹配、菲涅爾半波帶等理論,設計多聚焦的聲波菲涅爾透鏡。在模擬上,本論文使用特徵頻域分析,用理想波源分別對空氣透鏡、不同聚焦環數、不同厚度、不同聚焦組合對聲透鏡進行聲壓場模擬與分析;接著利用聲壓場之模擬結果,進一步對粒子受力、粒子分布進行模擬與討論。最後,耦合聲、電、固等物理性質,針對實際元件進行模擬與討論。
    ;In this paper, we mainly discusses manipulation of particles in solution for many aspects by simulation. We produce partial potential well in simulation environment by using the difference of acoustic focusing lens, and the particles would tend to the area. Compared to old-style acoustic focusing elements, such as acoustic levitation, a interdigital design; we can use only a single element with a lens film to obtain acoustic trapping ability, so experiment erection will be relatively brief.
    In this paper, we referred air reflector by acoustic impedance matching, and Fresnel half-wave zone theory to build acoustic Fresnel lens. In the simulation, we analyze feature of sound pressure field by frequency domain, and discuss different situation, such as variation of ring number, variation of thickness, and combinations of acoustic lens with different focal length; then we analyze particle distribution by result from sound pressure field simulation; finally, we coupling some physical properties, such as sound, electricity, solid, to simulate real physical situation.
    Appears in Collections:[機械工程研究所] 博碩士論文

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