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系統識別號 U0026-0812200915303181
論文名稱(中文) 超音波誘導流場之觀測
論文名稱(英文) Visualization and Measurement of the Flow Field Induced by Ultrasound
校院名稱 成功大學
系所名稱(中) 航空太空工程學系碩博士班
系所名稱(英) Department of Aeronautics & Astronautics
學年度 97
學期 2
出版年 98
研究生(中文) 蔡章立
研究生(英文) Chang-Li Tsai
電子信箱 p4695448@mail.ncku.edu.tw
學號 P4695448
學位類別 碩士
語文別 中文
論文頁數 56頁
口試委員 口試委員-王覺寬
口試委員-吳士傑
指導教授-尤芳忞
中文關鍵字 超音波 
英文關鍵字 ultrasound 
學科別分類
中文摘要 本實驗旨在探討超音波作用於水中,其誘導流場之觀察與測量。利用紋影法不干涉流場、且可範圍觀察的特性,觀察超音波聲束,藉此測得超音波在不同驅動電壓下,其聲束的聲束寬、焦點聲束寬、焦點面積、以及焦點位置。此外,利用天平在不干擾流場的狀況下,量測超音波作用於水中,且不同驅動電壓所產生之作用力。而結合以上兩個實驗之結果,可進一步推得超音波在不同驅動電壓下,其聲束焦點之平均壓力、平均聲強、平均功率。
英文摘要 This study is to observe and to measure the flow field in the water induced by an ultrasound. Based on the characters of schlieren method, without disturbing the flow field and having a large field of view, the ultrasound beam induced flow field in the water is observed. By this method, the beamwidth, beamwidth of the focus, focus area, and the position of focus have been observed and measured in various ultrasound driving voltage. Following with a special designed balance system to measure the force produced by the probe under different driving voltage in the water. Combine both of the measurement and observation results of the previous two experiments the mean pressure, mean intensity, and mean power of the focus of beam have been obtained.
論文目次 中文摘要 I
Abstract II
致謝 III
目錄 IV
表目錄 V
圖目錄 VI
符號說明 VIII
第一章 緒論 1
1.1 研究動機與目的 1
1.2 文獻回顧 2
1.2.1 超音波觀測 2
1.2.2 超音波之量測 3
1.2.3 視流技術的應用 4
第二章 理論分析 6
2.1 聲學理論 6
2.2 紋影法理論介紹 9
第三章 實驗設備與實驗方法 13
3.1 超音波之設備 13
3.2 超音波觀察 14
3.2.1 實驗設備 14
3.2.2 實驗方法 15
3.3 超音波量測 15
3.3.1 實驗設備 15
3.3.2 實驗方法 16
第四章 實驗結果與討論 17
4.1 超音波觀察 17
4.1.1 超音波流場觀察 17
4.1.2 超音波聲束焦點觀察 18
4.2 超音波量測 19
4.3 超音波聲束焦點功率 20
第五章 結論與建議 23
5.1 結論 23
5.2 建議 24
參考文獻 25
附錄 48
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