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研究生: 陸孟勳
Lu, Meng-Hsun
論文名稱: 脈衝式超音波激振式磁性感測技術之可行性探討
The Feasibility of Pulsed Ultrasound-Induced Magnetic Sensing Technology
指導教授: 謝振傑
Chieh, Jen-Jie
學位類別: 碩士
Master
系所名稱: 光電工程研究所
Graduate Institute of Electro-Optical Engineering
論文出版年: 2019
畢業學年度: 107
語文別: 中文
論文頁數: 171
中文關鍵詞: 聲波式振動樣品磁量儀超音波磁性感測
英文關鍵詞: Sound-exciting vibrating sample magnetometer, Ultrasound, Magnetic sensing
DOI URL: http://doi.org/10.6345/NTNU201900990
論文種類: 學術論文
相關次數: 點閱:94下載:0
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  • 脈衝式超音波激振式磁性感測技術其架構建立於聲波式振動樣品磁量儀,圓形海爾貝克磁鐵陣列(circular Halbach array)作為主要磁場來源,利用音波管及聚焦式超音波管產生能量,使被極化的磁性材料在接收線圈中振盪,產生磁通量變化讓接收線圈產生電信號以達到造影技術之雛形。在磁場相同的情況下,先以振盪頻率20~20kHz之音波做為驗證基礎,進而使用振盪頻率為3MHz之超音波來看是否實驗結果會與音波之結果相符。脈衝式超音波激振式磁性感測技術之可行性探討其目標是未來在臨床上能以超音波結構性影像為基礎,結合磁性感測之功能性影像,同時看到器官或組織的結構及病灶的位置。

    Pulsed ultrasound-induced magnetic sensing technology is based on sound-exciting vibrating sample magnetometer. Circular Halbach array as the main source of magnetic field. Using a sonic probe and a focused ultrasonic probe to generate energy, causing the polarized magnetic material to vibrate in the receiving coil, and the magnetic flux change causes the receiving coil to generate an electrical signal to achieve the prototype of the contrast technique. In the case of the same magnetic field, the acoustic wave with an oscillation frequency of 20 to 20 kHz is used as the basis for verification, and then the ultrasonic wave with an oscillation frequency of 3 MHz is used to see whether the experimental result matches the result of the sound wave. The Feasibility of Pulsed Ultrasound-Induced Magnetic Sensing Technology is aimed at the future clinically based on ultrasound structural images, combined with functional images of magnetic sensing, while seeing the structure of organs or tissues and location of the lesion.

    摘要 i Abstract ii 目錄 iii 圖目錄 v 表目錄 vii 第一章 緒論 1 1.1 研究動機與目的 1 1.2 醫療用超音波 2 1.3 聲波式振動樣品磁量儀 3 第二章 實驗原理 4 2.1 聲學 4 2.1.1 聲波 4 2.1.2 聲速 6 2.1.3 聲壓 7 2.1.4 聲功率 7 2.1.5 質點位移 8 2.1.6 駐波 10 2.1.7 超聲波 12 2.2 壓電換能器 13 2.2.1 壓電材料 13 2.2.2 壓電效應 15 2.3 電磁學 17 2.3.1 電磁感應 17 2.3.2 磁場與磁導率 20 2.3.3 材料的磁性狀態 21 第三章 系統架構 23 3.1 系統主架構 23 3.2 數位示波器及函數產生器 26 3.3 音波管及超音波管 27 3.4 接收線圈 32 3.5 磁場模組 36 3.6 樣品 38 第四章 實驗結果 43 4.1 音波管實驗 43 4.1.1 連續波(4.7kHz) 43 4.1.2 Burst波(4.7kHz) 60 4.2 超音波實驗 86 4.2.1 Burst波(3MHz) 86 4.2.2 Z軸強度分析 122 4.2.3 XY平面強度分析 131 第五章 結論 170 5.1 結論 170 5.2 未來展望 170 參考文獻 171

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