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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 宋家驥(Chia-chi Sung) | |
dc.contributor.author | Yu Chang | en |
dc.contributor.author | 張育 | zh_TW |
dc.date.accessioned | 2021-06-16T06:43:38Z | - |
dc.date.available | 2016-08-01 | |
dc.date.copyright | 2014-08-01 | |
dc.date.issued | 2014 | |
dc.date.submitted | 2014-07-28 | |
dc.identifier.citation | [1] 吳朗, 電子陶瓷 : 壓電陶瓷: 全欣科技圖書, 1994.
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Patat, 'Highly attenuative rubber modified epoxy for ultrasonic transducer backing applications,' Ultrasonics, vol. 34, pp. 669-675, 1996. [35] K. Nicolaides, L. Nortman, and J. Tapson, 'The effect of backing material on the transmitting response level and bandwidth of a wideband underwater transmitting transducer using 1-3 piezocomposite material,' Physics Procedia, vol. 3, pp. 1041-1045, 1/1/ 2010. [36] N. L. Richter, 'Modeling of pulse-echo inspections of multi-layer panels containing delaminations,' Master of Science, Aerospace Engineering, 2010. [37] R. A. Webster, T. W. Button, C. Meggs, D. MacLennan, and S. Cochran, 'P3K-5 Passive Materials for High Frequency Ultrasound Components,' in Ultrasonics Symposium, 2007. IEEE, 2007, pp. 1925-1928. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57376 | - |
dc.description.abstract | 超音波量測系統在水利及海洋工程、非破壞檢測、醫療等領域應用已行之有年。其中超音波換能器又是系統中的重要元件之一。換能器,顧名思義即是將不同形式的能量彼此轉換,例如壓磁換能器、壓電換能器等。超音波換能器屬於壓電換能器,在進行分析時常需要機械與電子電路相關知識才能完整描述,因此國內外有許多領域的學者根據各式各樣的模擬方法,結合不同的模擬軟體或演算法,建立能夠表示真實系統的模型,如此一來能省去試誤法(trial and error)所需支出的成本。除了模擬方法以外,聲學材料的實際製造、選擇也深深影響著成品設計的優劣。
本研究主要工作除了背膠材料製備外,另以單層背膠層、匹配層和PZT陶瓷複合壓電片構成的超音波換能器系統,利用KLM等效電路模型、傳輸線理論及損失因子,透過結合實際材料參數計算等效電路的各元件數值並進行模擬。藉由模擬結果,我們可以得到換能器輸入阻抗及時域響應等預期表現,將之歸納整理後,和實驗做定性與定量的比較驗證模擬方法的可行性,以作為換能器的製作參考。最後,再進一步比較自製換能器與商用換能器以討論設計上的改進方向,比較項目包含頻寬、靈敏度、解析度等。研究中也針對背膠層材料設計做了探討,希望能夠提供未來換能器相關設計一些參考。 | zh_TW |
dc.description.abstract | Ultrasonic transducers has been used for ocean engineering, noninvasive medical application, and nondestructive testing for years. The selection of modeling method and manufacture of acoustic materials are always the key of design. This thesis presents the theoretical and experimental procedures about designing the transducers. The KLM model, acoustic transmission line, and loss mechanisms were employed to calculate the input impedance and time response of the transducers. Then several home made transducers were conducted. It is demonstrated that the simulation results offers good predictions of performance of transducers. It could be useful in decreasing time of Trial and error on experiments. In the last section, we compared the commercial transducer with home made ones, inclusive of bandwidth, sensitivity, and longitudinal resolution. Besides, the literature survey and induction of backing layer are also important section of the thesis.
Hope to provide some reference for future work. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T06:43:38Z (GMT). No. of bitstreams: 1 ntu-103-R01525019-1.pdf: 3368499 bytes, checksum: 1bce04a76cb6230faad1d7324af97821 (MD5) Previous issue date: 2014 | en |
dc.description.tableofcontents | 口試委員會審定書 #
誌謝 i 中文摘要 ii ABSTRACT iii 目錄 iv 圖目錄 vii 表目錄 x Chapter 1 緒論 1 1.1 前言 1 1.2 研究動機 2 1.3 文獻回顧 2 1.4 論文架構 4 Chapter 2 理論基礎 6 2.1 聲阻抗 6 2.2 壓電效應與逆壓電效應 7 2.3 壓電材料統御方程式 8 2.4 壓電晶體波傳概述 10 2.4.1 非等向性波傳[17] 10 2.4.2 壓電晶體波傳 11 2.5 損失因子介紹與公式 13 2.5.1 機械損失(Mechanical Loss) 13 2.5.2 壓電損失(Piezoelectric Loss) 13 2.5.3 介電損失(Dielectric Loss) 13 2.5.4 計算方式 14 2.6 傳輸線理論 14 2.7 換能器結構 18 2.8 靈敏度 19 Chapter 3 模擬理論 22 3.1 KLM等效電路 22 3.1.1 壓電材料一維波傳 22 3.1.2 阻抗矩陣與等效電路 25 3.1.3 等效電路與傳輸線矩陣 26 3.2 輸入阻抗 31 3.3 脈衝回波 32 Chapter 4 材料製備與量測 36 4.1 壓電材料 36 4.2 匹配層 38 4.3 背膠層 38 4.3.1 設計理論 38 4.3.2 材料厚度 41 4.4 換能器製備 42 4.5 換能器量測 44 4.5.1 實驗設備與硬體流程 44 4.5.2 量測方法 48 Chapter 5 結果與討論 49 5.1 不同結構換能器之模擬比較 49 5.1.1 輸入阻抗 49 5.1.2 時域響應 52 5.2 不同結構換能器之實驗比較 56 5.3 自製換能器之模擬與實驗比較 64 5.4 自製與市售換能器之比較 66 Chapter 6 結論與未來展望 67 6.1 結論 67 6.2 未來展望 67 REFERENCE 68 | |
dc.language.iso | zh-TW | |
dc.title | 超音波換能器等效電路模擬與背膠層設計 | zh_TW |
dc.title | The simulation of ultrasonic transducer and design of backing layer | en |
dc.type | Thesis | |
dc.date.schoolyear | 102-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 王昭男,羅如燕,林益煌 | |
dc.subject.keyword | 超音波換能器,KLM model,損失因子,背膠層, | zh_TW |
dc.subject.keyword | ultrasonic transducer,KLM model,loss mechanism,backing layer, | en |
dc.relation.page | 64 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2014-07-29 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
顯示於系所單位: | 工程科學及海洋工程學系 |
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