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系統識別號 U0026-1708201015565000
論文名稱(中文) 解析式超音波換能器之量測與分析
論文名稱(英文) The Measurement and Analysis of an Analytic Back Scattering Ultrasound Transducer
校院名稱 成功大學
系所名稱(中) 機械工程學系碩博士班
系所名稱(英) Department of Mechanical Engineering
學年度 98
學期 2
出版年 99
研究生(中文) 朱品儒
研究生(英文) Pin-Ru Zhu
學號 n1697135
學位類別 碩士
語文別 中文
論文頁數 75頁
口試委員 指導教授-李永春
口試委員-王逸君
口試委員-楊天祥
中文關鍵字 P(VDF-TrFE)  解析式超音波換能器  Angular Spectrum理論 
英文關鍵字 P(VDF-TrFE)  Analytical Back Scattering Arrayed Ultrasound Transducer  Angular Spectrum Theory 
學科別分類
中文摘要 本論文探討一種新型的陣列式P(VDF-TrFE) 解析式超音波換能器,配合Angular Spectrum理論的聲場計算,針對不同材料進行量測與資料分析。傳統的超音波換能器缺乏聲場解析的能力,因為其工作原理是將一壓電材料所接收的所有聲場信號進行積分疊加,得到一個單一輸出電壓信號;如此一來,聲場的空間分佈資訊會遺漏,無法進行更詳盡的聲場解析與反算。是故,本文製作一陣列式P(VDF-TrFE) 解析式超音波換能器,在傳統聚焦式換能器鏡頭的內凹曲面上,以分割電極方式製作出陣列式感測單元,每個感測單元可以在特定的位置上接收信號並且獨立輸出其信號;此一設計可以完整接收來自散射體在不同位置與方向的聲波資訊,因此將具有較佳空間解析聲場的能力。此外,本論文使用Angular Spectrum理論來計算無缺陷的待測材料應得到之反射信號,再與實際量測無缺陷之待測物之反射信號做比較及分析,分析結果證實兩者信號趨勢是符合的,並且可以透過反射係數的差異,對於反射信號之變化去判定所量測為何種材料。
英文摘要 This thesis discusses the measurement results using a laboratory-made P(VDF-TrFE) analysis ultrasonic transducer and the analysis data predicted by angular spectrum theory. Traditional focusing ultrasound transducer gives only one voltage signal by integrating all received wave signals on the surface of a piezoelectric material. This integration process destroys some important information in the ultrasound field. In this thesis, a PZT/PVDF hybrid ultrasound focusing transducer is proposed, fabricated, and experimentally tested. This new type ultrasound transducer contains a number of independent PVDF hydrophone elements on the concave spherical surface of the transducer. Each PVDF element can recording the back-scattered wave signal reflected and scattered by a sample, and therefore can be used to analyze the back-scattered ultrasound field and derive useful information about the sample. For understanding the performance of this new transducer, angular spectrum theory is used to calculate the reflection signal which is reflected from a sample. The theoretical or predicted signal waveforms on each PVDF element are then compared with their experimental counterparts. Good agreement is observed. By observing the reflected signal waveforms, it is possible to recognize the angular refection coefficients of a sample and identify the material properties of the sample. It demonstrates the potential in non-destructive evaluation of this new analytical transducer.
論文目次 目錄
摘要 ........................ Ⅰ
Abstract...................... Ⅱ
致謝........................ Ⅲ
目錄....................... Ⅳ
表目錄....................... Ⅴ
圖目錄....................... Ⅵ
第一章 緒論................. 1
1-1 研究背景與目的.......... 1
1-2 文獻回顧............. 5
1-3 本文架構............. 7
第二章 換能器之特性與理論基礎......... 8
2-1壓電材料概述及重要參數....... 8
2-2 Angular Spectrum 理論....... 12

第三章 解析式超音波換能器.......... 19
3-1 解析式超音波換能器之設計與製作... 19
3-2電壓放大器與多通道控制電路器設計製作............... 29
3-2-1電壓放大器........... 29
3-2-2多通道控制電路器設計....... 32
3-3量測系統之儀器設備.......... 37
第四章 解析式超音波換能器量測與分析...... 40
4-1預測入射聲場之量測系統........ 40
4-2 Angular Spectrum 演算法及驗證..... 41
4-3 解析式換能器之量測系統架構....... 47
4-3-1 解析式換能器之量測系統....... 47
4-3-2 解析式換能器之量測系統程式控制............. 48
4-4 解析式換能器之特性量測與分析...... 50

第五章 結論與探討................. 62
5-1 結論.................. 62
5-2 未來展望................ 64

參考文獻 .............. 65
附錄A ................. 67
附錄B ................. 69
附錄C ................. 71
附錄D ................. 74
自述 .................. 75
參考文獻 [1] F. S. Foster, G. R. Lockwood, L. K. Ryan, Harasiewicz K. A., L. Berube and A. M. Rauth, “ Principles and applications of ultrasound backscatter microscopy,” IEEE Transaction on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 40, pp. 608-577, 1993.

[2] M. D. Sherar and F. S. Foster, “Ultrasound Backscatter Microscopy,”
IEEE Ultrasonics Symposium, vol. 2, pp. 959-966, 1988.

[3] Smolorz, and W. Grill. “Focusing PVDF Transducers for Acoustic
Microscopy, “Res. Nondestr. Eval., 7, pp. 195-201, 1996.

[4] H. Kawai, “The Piezoelectricity of Poly(vinylidene Fluoride),” Jpn. J.
Appl. Phys., vol. 8, pp. 975-976, 1969.

[5] Y. C. Lee, J. M. Yu and S. W. Huang, “Fabrication and Characterization of a PVDF Hydrophone Array Transducer, “Key Engineering Materials,
vol. 270-273, pp. 1406-1413, 2004.

[6] Cheng-Hsien Chung and Yung-Chun Lee, “A novel back scattering ultrasound transducer for non-destructive material evaluation, “Proceeding of the 2007 ICU Coference,Vienna,Austria.

[7] M. S. Ibbini, and C. A. Cain, "The concentric-ring phased array hyperthermal applicator: problem associated with directly synthesized annular heating patterns," IEEE Transaction on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 36, pp. 574-577, 1989.

[8] F. S. Foster, Lockwood, G. R., Ryan, L. K., K. A., Harasiewicz, Berube, L. and Rauth, A. M., “ Principles and applications of ultrasound backscatter microscopy,” IEEE Transaction on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 40, pp. 608-577, 1993.

[9] M. D. Sherar and F. S. Foster, “Ultrasound backscatter microscopy,” IEEE Ultrasonics Symposium, vol. 2, pp. 959-966, 1988.

[10] Atalar Abdullah, “An angular-spectrum approach to contrast in reflection acoustic microscopy,” Journal of Applied Physics, vol. 49, pp. 5130-5139, 1978.

[11] S. Smolorz and W. Grill, “Focusing PVDF Transducers for Acoustic
Microscopy,” Res Nondestr Eval, vol. 7, no. 4, pp. 195-201, 1995.

[12] Goodfellow Catalogue, Goodfellow Co., PA, Berwyn, USA, 1998.

[13] 邱巨霖, 壓電式PVDF水聽器與解析是超音波換能器之研究, 國立成功大學機械工程研究所碩士論文, 民國 95 年

[14] 江常睿, 陣列式PZT水聽器與快速聲場量測系統之開發, 國立成功大學機械工程研究所碩士論文, 民國 98 年


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