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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 | Kai-Chieh Yu | en |
dc.contributor.author | 游凱傑 | zh_TW |
dc.date.accessioned | 2021-07-09T15:52:56Z | - |
dc.date.available | 2023-07-24 | |
dc.date.copyright | 2020-08-04 | |
dc.date.issued | 2020 | |
dc.date.submitted | 2020-07-24 | |
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United States Patent 2013/0042690, filed December 14, 2011, and issued February 21, 2013. 吳文中、陳俊杉、林嘉宇、蔡子勤、李士豐、郭俊良。超音波感測器。中華民國專利I440831,申請於2011年4月27日,公告於2014年6月11日。 J. A. Gallego-Juárez, 1989. “Piezoelectric Ceramics and Ultrasonic Transducers,” Journal of Physics E: Scientific Instruments. 22: 804-816. 吳宜仲,2018。「振動篩網霧化器模擬分析與高黏滯液體霧化量改善」。碩士論文,國立臺灣大學工程科學及海洋工程學研究所。 W. P. Mason, 3rd., 1948. Electro-mechanical Transducers and Wave Filters. Princeton, New Jersey: D. van Nostrand. R. Krimholtz, D. A. Leedom, G. L. Matthaei, 1970. “New Equivalent Circuits for Elementary Piezoelectric Transducers,” Electronics Letters. 6(13): 398-399. H. Allik and T. J. R. Hughes, 1970. “Finite Element Method for Piezoelectric Vibration,” International Journal for Numerical Methods in Engineering. 2: 151-157. Y. Kagawa and T. Yamabuchi, 1974. “Finite Element Simulation of Two-Dimensional Electromechanical Resonators,” IEEE Transaction on Sonics and Ultrasonics. SU-21(4): 275-283. H. Allik and K. M. Webman, 1974. “Vibrational Response of Sonar Transducers Using Piezoelectric Finite Elements,” The Journal of The Acoustical Society of America. 56(6): 1782-1791. D. Boucher, M. Lagier, C. Maerfeld, 1981. “Computation of the Vibrational Modes for Piezoelectric Array Transducers Using a Mixed Finite Element-Perturbation Method,” IEEE Transaction on Sonics and Ultrasonics. SU-28(5): 318-330. D. F. Ostergaard and T. P. Pawlak, 1986. “Three-Dimensional Finite Elements for Analyzing Piezoelectric Structures,” paper presented at IEEE 1986 Ultrasonics Symposium. Williamsburg, VA., November 17-19. R. Lerch and H. Kaarmann, 1987. “Three-dimensional Finite Element Analysis of Piezoelectric Media,” paper presented at IEEE 1987 Ultrasonics Symposium. Denver, Colorado., October 14-16. W. Friedrich, R. Lerch, K. Prestele, and R. Soldner, 1990. “Simulations of Piezoelectric Lamb Wave Delay Lines Using a Finite Element Method,” IEEE Transactions on Ultrasonics. Ferroelectrics. And Frequency Control. 37(2): 248-254. R. Lerch, 1990. “Simulation of Piezoelectric Devices by Two- and Three-Dimensional Finite Elements,” IEEE Transactions on Ultrasonics. Ferroelectrics. And Frequency Control. 37(2): 233-247. N. Guo, P. Cawley, D. Hitchings, 1992. “The Finite Element Analysis of the Vibration Characteristics of Piezoelectric Discs,” Journal of Sound and Vibration. 159(1): 115-138. R. Lerch, 1988. “Finite Element Analysis of Piezoelectric Transducers,” paper presented at IEEE 1988 Ultrasonics Symposium. D-8520 Erlangen, West Germany. 馮若(編),1999。《超聲手冊》。南京:南京大學出版社。 鄒年棣,2006。「應用有限元素法模擬壓電元件與超音波波傳」。碩士論文,國立臺灣大學土木工程學系。 R. Kapoor, S. Ramasamy, A. Gardi, R. V. Schyndel, and R. Sabatini, 2018. “Acoustic Sensors for Air and Surface Navigation Applications,” Sensors. 18(499): 1-25. Retrieved January 23, 2020, from https://www.pcb.com/contentstore/mktgContent/LinkedDocuments/Acoustics/TM-AC-378C01_lowres.pdf S. C. Wooh and Y. Shi, 1999. “Optimum Beam Steering of Linear Phased Arrays,” Wave Motion. 29: 245-265. 林嘉宇,2008。「單體雙源超音波測距感應器之指向性研究」。碩士論文,國立臺灣大學應用力學研究所。 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/76476 | - |
dc.description.abstract | 超音波已有多年的發展歷史,不論是在軍事、工業、醫學、或是生活上皆有廣泛的應用。時至今日,隨著科技蓬勃發展,超音波之應用與我們生活更是密不可分。超音波可傳遞於液體、固體、或空氣介質,其主要原理皆為利用換能器發射及接收超音波,來達到偵測物件之功用,其中包括應用於無人載具(車、船)、工廠產線及手機指紋辨識技術等。從結構而言,傳遞於空氣介質之超音波(空氣超音波),其換能器基本上可區分為開放式及封閉式兩大類型。開放式換能器能與空氣直接接觸,其發射/接收效率較高,構造也相對單純。但基於防水、防塵、或一些特殊環境(酸、鹼、鹽、塵…等)防護之必要,換能器必須封閉式的被保護於一外殼內,此時不但犧牲了部分的能量傳遞效率,也相對的造成結構的複雜性。 以目前市售封閉式車用空氣超音波的應用為例,其有效偵測距離約為4 m左右。但有許多的場合(無人船、大型車、聯結車…)需要更長的偵測距離,卻無從購得此類產品,使用者也沒有能力改變其設計。因此本研究將針對封閉式空氣超音波換能器,進行軟體模擬及實際製作,並比對包含阻抗、模態振型、發射/接收靈敏度及指向性等相互結果,期能建立一換能器完整設計流程及製作方法,以有效提升其偵測距離,並控制發射方向及角度,同時也建立未來(目前尚未問世)之高階陣列式空氣超音波設計能力。 | zh_TW |
dc.description.abstract | Ultrasound has many years of development history, and it has been widely used in life, medicine, and industry. Today, with the vigorous development of technology, ultrasonic transducer has become inseparable from our lives. Ultrasonic waves can be transmitted to liquid, solid, or air media. The main principle is used transducer to transmit and receive ultrasonic waves to detect objects. The application includes using in unmanned vehicles (cars, boats), factory production lines, and mobile phone fingerprint recognition technologies. In terms of structure, the air ultrasonic transducer can be basically divided into two types: open and closed. The open transducer can be in direct contact with the air, its transmission / reception efficiency is high, and its structure is relatively simple. However, based on the necessity of protection against water, dust, or some special environments (acid, alkali, salt, dust, etc.), the transducer must be enclosed and protected in a shell, which not only sacrifices part of the energy transmission efficiency, it also relatively increases the complexity of the structure. Taking the application of vehicle ultrasound as an example, its effective detection distance is about 4 m. However, there are many occasions that require longer detection distances, but such products cannot be purchased, and users have no ability to change their design. Therefore, we will try to design the transducer by simulation and verify the sound characteristics by experiments in this research. We hope that we will build up the complete design process and manufacturing method of the transducer. Finally, we can effectively increase its detection distance and control the directivity angle. At the same time, we also establish the ability of designing the high-order array transducer. | en |
dc.description.provenance | Made available in DSpace on 2021-07-09T15:52:56Z (GMT). No. of bitstreams: 1 U0001-2407202010514600.pdf: 4489474 bytes, checksum: 59757f4092fed17a42e659f9c35a0a7a (MD5) Previous issue date: 2020 | en |
dc.description.tableofcontents | 口試委員審定書 # 謝誌 i 中文摘要 ii ABSTRACT iii 目錄 v 圖目錄 viii 表目錄 xii 第一章 緒論 1 1.1 研究動機與目的 1 1.2 超音波換能器專利文獻回顧 2 1.3 論文架構 6 第二章 背景理論 8 2.1 壓電效應 8 2.2 壓電換能器之基礎構造 12 2.3 壓電換能器之有限元素理論 15 2.4 聲音於空氣中之衰減理論 19 第三章 研究方法與實驗架構 22 3.1 實驗儀器 22 3.2 超音波換能器聲學特性量測 26 第四章 軟體模擬分析及驗證 32 4.1 壓電元件模態分析及指向性驗證 33 4.1.1 計算結果與參考文獻之比較 35 4.2 輻射聲場分析及理論驗證 39 4.2.1 圓形平板活塞指向性模擬及驗證 40 4.2.2 線性相位陣列指向性模擬及驗證 43 4.3 30 kHz壓電換能器聲學模組模擬 50 4.3.1 工作振動面厚度對於頻率的影響 51 4.3.2 30 kHz換能器垂直衰減角度改良 52 第五章 實驗結果與討論 59 5.1 40 kHz換能器之實驗量測結果 59 5.1.1 阻抗分析結果 59 5.1.2 聲源強度量測結果 60 5.1.3 接收靈敏度量測結果 61 5.2 振動面厚度對於換能器之頻率及聲學特性影響 62 5.2.1 阻抗分析結果 63 5.2.2 聲源強度量測結果 65 5.2.3 聲音衰減特性曲線 69 5.2.4 接收靈敏度量測 72 5.2.5 振動面厚度對於接收靈敏度之影響 75 5.3 30 kHz換能器指向性改良結果 76 第六章 結論與未來展望 84 6.1 結論 84 6.2 未來展望 85 參考文獻 87 附錄一:A、B、C type換能器尺寸規格 92 附錄二:A、B、C type聲源強度量測原始數據 95 附錄三:A、B、C type接收靈敏度量測原始數據 97 | |
dc.language.iso | zh-TW | |
dc.title | 封閉式超音波換能器設計及性能改善 | zh_TW |
dc.title | Design and Performance Improvement for Enclosed Ultrasonic Transducer | en |
dc.type | Thesis | |
dc.date.schoolyear | 108-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 黃心豪(Hsin-Haou Huang),林益煌(Yih-Hwang Lin) | |
dc.subject.keyword | 空氣換能器,能量衰減,聲源強度,接收靈敏度,指向性,共振頻率, | zh_TW |
dc.subject.keyword | Air transducer,Power attenuation,Sound source level,Receiving sensitivity,Directivity,Resonance frequency, | en |
dc.relation.page | 98 | |
dc.identifier.doi | 10.6342/NTU202001815 | |
dc.rights.note | 同意授權(全球公開) | |
dc.date.accepted | 2020-07-27 | |
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 |
dc.date.embargo-lift | 2023-07-24 | - |
顯示於系所單位: | 工程科學及海洋工程學系 |
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