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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李世光(Chih-Kung Lee) | |
dc.contributor.author | Chia-Yu Lin | en |
dc.contributor.author | 林嘉宇 | zh_TW |
dc.date.accessioned | 2021-06-15T00:38:46Z | - |
dc.date.available | 2013-10-29 | |
dc.date.copyright | 2008-10-29 | |
dc.date.issued | 2008 | |
dc.date.submitted | 2008-10-24 | |
dc.identifier.citation | [1] http://www.aium.org/aboutAIUM/timeline/1950.asp
[2] S. Temkin, Elements of Acoustics, John Wiley & Sons, 1981. [3] B.D. Steinberg, Principles of Aperture and Array System Design, John Wiley and Sons, 1976. [4] S.H. Li, “Ultrasound Sensor for Distance Measurement,” United States Patent No. 6,181,645, Jan. 30, 2001. [5] S. Amaike, and J. Ota, “Ultrasonic Sensor,” United States Patent No. 6,250,162, June 26, 2001. [6] S. Amaike, and J. Ota, “Ultrasonic Wave Transmitter/Receiver,” United States Patent No. 6,593,680, July 15, 2003. [7] P. Rapps, P. Knoll, F. Pachner, M. Noll, and M. Fischer, “Ultrasonic Transducer,” United States Patent No. 5,446,332, Aug. 29, 1995. [8] H.F. Tiersten, Linear piezoelectric plate vibration, plenum press, New York, 1969. [9] J.F. Nye, Physical Properties of Crystals: Their Representation by Tensor and Matrices, Oxford University Press, 1985. [10] 周卓明, 壓電力學, 全華科技圖書股份有限公司, 2003. [11] ANSI/IEEE Standard 176, Piezoelectricity, The Institute of Electrical and Electronics Engineers, Inc. September, 1987. [12] C.K. Lee, “Piezoelectric Laminates for Torsion and Bending Model Control: Theory and Experiment,” Ph.D. Dissertation, Department of Theoretical and Applied Mechanics, Cornell University, 1987. [13] S. Timoshenko and S. Woinowsky-Krieger, Theory of Plates and Shells, McGraw-Hill, New York, 1959. [14] M. Nader, H. Gattringer, M. Krommer, and H. Irschik “Shape Control of Flexural Vibrations of Circular Plates by Shaped Piezoelectric Actuation,” Journal of Vibration and Acoustics, Vol. 125, pp. 88-94, January, 2003. [15] L.E. Kinsler and A.R. Frey, Fundamentals of Acoustics, 2nd Ed., John Wiley & Sons, Inc., New York, 1962. [16] P. M. Morse, and K.U. Ingard, Theoretical Acoustics, McGraw-Hill, London, 1968. [17] L. Rayleigh, Theory of Sound, 2nd Ed., Macmillan, London, 1896. [18] M.C. Junger and D. Feit, Sound, Structures, and Their Interaction, 2nd Ed., MIT Press, Massachusetts, 1986. [19] K.U. Ingard, Fundamentals of Waves & Oscillations, Cambridge University Press, Cambridge, 1988. [20] 鄒年棣,應用有限元素法模擬壓電元件與超音波波傳,碩士論文,國立台灣大學土木研究所,台北,2006. [21] 胡智凱,封閉式超音波感測器之設計與有限元素模擬,碩士論文,國立台灣大學土木研究所,台北,2007. [22] N. Guo, P. Cawley, and D.Hitchings, “The Finite Element analysis of the vibration characteristics of piezoelectric discs” Journal of Sound and Vibration, Vol. 159, No. 1, pp. 115-138, 1992. [23] ANSYS Version 10.0, 2006. ANSYS, Inc., http://www.ansys.com/. [24] 陳精一,ANSYS 振動學實務分析,高立出版社,2005. [25] J.W. Goodman, Introduction to Fourier Optics, McGraw Hill, New York, 1995. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/41947 | - |
dc.description.abstract | 本研究之新型單體雙源超音波測距感應器,乃針對車用超音波感測器來進行研發與創新,一般來說,超音波發射器有幾個主要的設計目標,由於單一波源之倒車雷達所發射的超聲波於水平方向之角度不夠寬廣,因此需利用多顆倒車雷達進行干涉,才能獲得大範圍距離的監測;而在鉛直方向之角度卻又過大,限制了監測距離的長度。此外,監測距離的長度同時受限於超音波發射器本身的殘響以及接受電路的殘響。目前單體雙源超音波發射器的概念,用來改善上述倒車雷達之缺點,提高水平與鉛直之指向角比例,首先透過有限元素進行模擬的方法來確定超音波感測器之模態、共振頻率以及相關的資訊,再加以製作感測器之原型,並透過實驗來驗證其設計。在實驗中利用單一結構產生兩獨立波源,進而縮小發射器體積,並控制輸入訊號之相位,產生非對稱波形。此一方法增加超音波測距發射器之使用範圍,並可解決殘響問題、進而提供監測更短距離之方法。 | zh_TW |
dc.description.abstract | Ultrasonic sensors have been used widely to generate higher directional radiating patterns where piezoelectric units are sparsely distributed in space. In this study, we present a novel design of a phase array ultrasonic sensor based on the concept of vibration decoupling. Decoupling is usually achieved by careful design of a source aperture, which allows piezoelectric discs to be tightly located in the same structure. Our novel design was based on a cylinder with a dumbbell shape groove to decouple the vibration. A finite element method was used to optimize the design. Two piezoelectric discs were adhered to the bottom plate of the sensor whereby a desirable wave generation and detection were controlled adaptively. By electrical steering, the sensor was thus able to operate with the specific fixed phase. Prototypes of the sensor were made and experimental work was conducted to verify the simulation results. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T00:38:46Z (GMT). No. of bitstreams: 1 ntu-97-R95543051-1.pdf: 3134217 bytes, checksum: aa5b5d8d5e34f4cf0557bc4315f3439a (MD5) Previous issue date: 2008 | en |
dc.description.tableofcontents | 誌謝 i
中文摘要 ii ABSTRACT iii CONTENTS iv LIST OF FIGURES vi LIST OF TABLES x Chapter 1 Introduction 1 1.1 Motivation 1 1.2 Research method and purpose 2 1.3 Thesis organization 3 Chapter 2 Design parameters and patent analysis 4 2.1 Design parameters 4 2.2 Patent review 7 2.2.1 US Patent 6181645 7 2.2.2 US Patent 6250162 8 2.2.3 US Patent 6593680 10 2.2.4 US Patent 5446332 11 Chapter 3 Theory 15 3.1 Fundamental theory of piezoelectricity 15 3.2 Vibration of a plate 19 3.3 Flexural vibration with piezoelectric actuation 23 3.4 Radiation of acoustic wave 24 3.5 Interference of waves from the two sources 26 3.6 Simulation theory and method 28 3.7 Theory of finite element analysis in piezoelectric material 29 3.8 Modal analysis of piezoelectric 31 Chapter 4 Simulation and experimental results 34 4.1 Mode shape of the ultrasonic sensor with modal analysis 34 4.1.1 Thickness of the side wall of the ultrasonic sensor analysis 35 4.1.2 The out-diameter of the ultrasonic sensor analysis 37 4.1.3 The width of the small channel between the two sources analysis 39 4.2 Mode shape of the ultrasonic sensor with harmonic analysis 42 4.3 Experimental set-up 44 4.4 Experimental result: vibration decoupled 46 4.5 Experimental result: directivity of the dual sources in a single enclosure 49 Chapter 5 Conclusion and future work 61 5.1 Conclusion 61 5.2 Future work 61 Reference 64 | |
dc.language.iso | en | |
dc.title | 單體雙源超音波測距感應器之指向性研究 | zh_TW |
dc.title | Directivity Study of Dual Source Single Enclosure Ultrasonic Parking Sensors | en |
dc.type | Thesis | |
dc.date.schoolyear | 97-1 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 張培仁(Pei-Zen Chang) | |
dc.contributor.oralexamcommittee | 陳俊杉(Chuin-Shan Chen),吳文中(Wen-Jong Wu) | |
dc.subject.keyword | 有限元素分析,超音波感測器,倒車雷達,指向性,結構設計,模態, | zh_TW |
dc.subject.keyword | ultrasonic sensor,mode shape,Finite element analysis,directivity,parking sensor, | en |
dc.relation.page | 76 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2008-10-24 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 應用力學研究所 | zh_TW |
顯示於系所單位: | 應用力學研究所 |
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