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| ???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
|---|---|---|
| dc.contributor.advisor | 宋家驥(Chia-Chi Sung) | |
| dc.contributor.author | Po-Yu Hsu | en |
| dc.contributor.author | 許伯瑜 | zh_TW |
| dc.date.accessioned | 2022-11-24T03:07:02Z | - |
| dc.date.available | 2022-01-17 | |
| dc.date.available | 2022-11-24T03:07:02Z | - |
| dc.date.copyright | 2022-01-17 | |
| dc.date.issued | 2021 | |
| dc.date.submitted | 2021-11-30 | |
| dc.identifier.citation | [1] J. A. Bamberger and M. S. Greenwood, 'Measuring fluid and slurry density and solids concentration non-invasively,' Ultrasonics, vol. 42, no. 1, pp. 563-567, 2004/04/01/ 2004, doi: https://doi.org/10.1016/j.ultras.2004.01.032. [2] A. H. Harker and J. A. G. Temple, 'Velocity and attenuation of ultrasound in suspensions of particles in fluids,' Journal of Physics D: Applied Physics, vol. 21, no. 11, pp. 1576-1588, 1988/11/14 1988, doi: 10.1088/0022-3727/21/11/006. [3] D. J. McClements and M. J. W. Povey, 'Scattering of ultrasound by emulsions,' Journal of Physics D: Applied Physics, vol. 22, no. 1, pp. 38-47, 1989/01/14 1989, doi: 10.1088/0022-3727/22/1/006. [4] J. R. Allegra and S. A. Hawley, 'Attenuation of Sound in Suspensions and Emulsions: Theory and Experiments,' The Journal of the Acoustical Society of America, vol. 51, no. 5B, pp. 1545-1564, 1972/05/01 1972, doi: 10.1121/1.1912999. [5] D. Wren, B. Barkdoll, R. Kuhnle, and R. Derrow, 'Field techniques for suspended-sediment measurement,' Journal of Hydraulic Engineering, vol. 126, no. 2, pp. 97-104, 2000. [6] D. J. McClements and P. Fairley, 'Ultrasonic pulse echo reflectometer,' Ultrasonics, vol. 29, no. 1, pp. 58-62, 1991/01/01/ 1991, doi: https://doi.org/10.1016/0041-624X(91)90174-7. [7] G. Guidarelli, F. Craciun, C. Galassi, and E. Roncari, 'Ultrasonic characterisation of solid-liquid suspensions,' Ultrasonics, vol. 36, no. 1, pp. 467-470, 1998/02/01/ 1998, doi: https://doi.org/10.1016/S0041-624X(97)00089-9. [8] V. Stolojanu and A. Prakash, 'Characterization of slurry systems by ultrasonic techniques,' Chemical Engineering Journal, vol. 84, no. 3, pp. 215-222, 2001. [9] 黃裕君, '超音波懸浮泥沙溶液濃度及流速量測:以高嶺土及水庫土樣為實驗驗證之研究,' 工程科學及海洋工程學研究所, 國立臺灣大學博士論文, 2008年, 2008. [10] 嚴蕙嘉, 'ARM微處理器在超音波泥砂濃度偵測系統之應用,' 工程科學及海洋工程學研究所, 國立臺灣大學碩士論文, 2014年, 2014. [11] 張宥駿, '超音波都卜勒流速量測系統硬體與泥沙濃度量測系統,' 工程科學及海洋工程學研究所, 國立臺灣大學碩士論文, 2014年, 2014. [12] J. Honda and J. Adams, 'Class D audio amplifier basics,' International Rectifier Application Note AN-1071, 2005. [13] K. Agbossou, J. L. Dion, S. Carignan, M. Abdelkrim, and A. Cheriti, 'Class D amplifier for a power piezoelectric load,' IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 47, no. 4, pp. 1036-1041, 2000, doi: 10.1109/58.852087. [14] N. O. Sokal and A. D. Sokal, 'Class E-A new class of high-efficiency tuned single-ended switching power amplifiers,' IEEE Journal of Solid-State Circuits, vol. 10, no. 3, pp. 168-176, 1975, doi: 10.1109/JSSC.1975.1050582. [15] F. H. Raab, 'Class-F power amplifiers with maximally flat waveforms,' IEEE Transactions on Microwave Theory and Techniques, vol. 45, no. 11, pp. 2007-2012, 1997, doi: 10.1109/22.644215. [16] T. G. Leighton, 'What is ultrasound?,' Progress in Biophysics and Molecular Biology, vol. 93, no. 1, pp. 3-83, 2007/01/01/ 2007, doi: https://doi.org/10.1016/j.pbiomolbio.2006.07.026. [17] M. El-Baba. 'Hocus POCUS—Using the Magic of Ultrasound to Look Inside the Body.' frontiers. https://kids.frontiersin.org/articles/10.3389/frym.2020.00066 [18] P. S. Epstein and R. R. Carhart, 'The absorption of sound in suspensions and emulsions. I. Water fog in air,' The Journal of the Acoustical Society of America, vol. 25, no. 3, pp. 553-565, 1953. [19] A. Manbachi and R. S. C. Cobbold, 'Development and Application of Piezoelectric Materials for Ultrasound Generation and Detection,' Ultrasound, vol. 19, no. 4, pp. 187-196, 2011, doi: 10.1258/ult.2011.011027. [20] SDtools. 'Basics of piezoelectricity.' SDtools. [21] 馮若, '超聲手册,' 南京大學出版社, 1999. [22] 吳明順, '適用於超音波頻段切換式功率放大器設計與比較,' 工程科學及海洋工程學研究所, 國立臺灣大學, 2016年, 2016. [23] M. Ekhteraei, M. Hayati, and F. Shama, 'High-Efficiency Low Voltage Inverse Class-F Power Amplifier Design Based on Harmonic Control Network Analysis,' IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 67, no. 3, pp. 806-814, 2020, doi: 10.1109/TCSI.2019.2952932. [24] W. Young Yun, Y. Youngoo, and K. Bumman, 'Analysis and experiments for high-efficiency class-F and inverse class-F power amplifiers,' IEEE Transactions on Microwave Theory and Techniques, vol. 54, no. 5, pp. 1969-1974, 2006, doi: 10.1109/TMTT.2006.872805. [25] A. Devices, AD8310 datasheet. [26] V. Siliconix, 'SI1308EDL datasheet..' [27] T. Instruments, TPS78408 datasheet. [28] T. Instruments, 'TPS73125 datasheet..' [29] T. Instruments, 'TPS73115 datasheet..' [30] 維基百科編者, '序列周邊介面,' in 维基百科，自由的百科全書 [31] A. Devices, AD7685 datasheet. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/80457 | - |
| dc.description.abstract | "台灣位處太平洋，四面環海，每年都遭受數個颱風侵襲，這樣的情形造成水庫淤積率逐年攀升。擁有非侵入、即時性等特點的超音波檢測技術是監測泥沙濃度的主要方法之一，以壓電片製成的超音波換能器更是這個系統裡的核心元件。本論文即是為了提高可量測的泥沙濃度動態範圍所設計之一發一收電路系統。 系統接收電路以AD8310對數放大器為主體，將接收換能器接收到之1MHz弦波訊號轉換包絡線再經由ADC輸出數位訊號給ARM微處理器分析。然而，由於AD8310有其動態範圍的限制，過強的發射電壓會造成低濃度變化無法準確地被偵測，為了提高整體量測的動態範圍，本研究設計出了一套能夠自動在三種發射電壓中選擇最適宜待測濃度之發射電壓的系統。 透過ARM微處理器控制功率放大器、電壓調整電路，以達成利用不同大小的發射訊號供給超音波換能器。其中功率放大器採用切換式功率放大器，利用電晶體使開關達到ZVS提高輸出效率。電壓選擇電路則是利用三個LDO直流穩壓器分別連接電晶體，利用GPIO接口控制開關，供給發射電壓給功率放大器，達成自動掃瞄不同發射電壓。 驗證方面，利用高嶺土製作不同濃度的懸浮液體，而電壓調整電路選用了三種穩壓器，分別為0.8V, 1.5V, 2.5V，以各個電壓分別進行測量，搭配理論校正後之率定曲線，對量測後的實驗數據進行比對。對照後發現，單一發射電壓之動態範圍會受到雜訊或者過高濃度干擾，量測時會有所受限。改以多發射電壓進行量測，搭配動態偵測，自動切換適合量測環境之發射電壓，量測時大約可提高5dB左右之動態範圍，且在低濃度量測時也比單一發射電壓表現來的好，此結果將有助於提供超音波濃度量測系統一個可行的發展方向。 " | zh_TW |
| dc.description.provenance | Made available in DSpace on 2022-11-24T03:07:02Z (GMT). No. of bitstreams: 1 U0001-3011202114560400.pdf: 13169172 bytes, checksum: c1eb810b00d793b4a8248dd2c62bb886 (MD5) Previous issue date: 2021 | en |
| dc.description.tableofcontents | 口試委員會審定書 # 誌謝 i 中文摘要 ii ABSTRACT iii CONTENTS iv LIST OF FIGURES vii LIST OF TABLES xii Chapter 1 緒論 1 1.1 研究背景與動機 1 1.2 文獻回顧 2 1.2.1 超音波濃度量測 2 1.2.2 切換式功率放大器 3 1.3 論文架構 4 Chapter 2 理論基礎 5 2.1 超音波理論 5 2.1.1 檢測超音波與功率超音波 6 2.1.2 超音波衰減理論 6 2.2 壓電超音波換能器 8 2.2.1 壓電效應 8 2.2.2 壓電超音波換能器 9 2.2.3 中心頻率與等效電路 10 2.2.4 指向性 11 2.3 切換式功率放大器 13 2.3.1 效率 13 2.3.2 切換式功率放大器種類 14 2.3.3 F類與反F類功率放大器推導 18 Chapter 3 研究方法與系統架構 22 3.1 超音波濃度量測原理 22 3.2 泥沙濃度量測實驗 26 3.2.1 實驗設備介紹 26 3.2.2 濃度量測實驗流程 30 3.3 電路模擬 34 3.3.1 反F類功率放大器電路模擬 34 3.3.2 電壓調整電路模擬 40 3.4 電路系統 42 3.4.1 Raspberry pi 42 3.4.2 電路製作與測試 45 3.4.3 發射電路 48 3.4.4 接收電路 49 3.4.5 電路實際照片 54 Chapter 4 溝通程式與實驗驗證 55 4.1 功率放大器實際量測 55 4.1.1 量測設定 55 4.1.2 量測結果 56 4.2 電壓調整電路實際量測 60 4.2.1 量測設定 60 4.2.2 量測結果 60 4.3 接收電路特性量測 61 4.3.1 輸入訊號靈敏度 61 4.3.2 各電壓量測濃度動態範圍 62 4.4 程式設計與架構 66 4.4.1 電壓調整程式流程 66 4.4.2 硬體連接與控制介面 67 Chapter 5 結論 69 Chapter 6 未來工作 71 Reference 72 | |
| dc.language.iso | zh-TW | |
| dc.subject | 電壓調整 | zh_TW |
| dc.subject | 超音波 | zh_TW |
| dc.subject | 切換式功率放大器 | zh_TW |
| dc.subject | LDO | zh_TW |
| dc.subject | ARM | zh_TW |
| dc.subject | 泥沙濃度 | zh_TW |
| dc.subject | Sediment Concentration | en |
| dc.subject | Switchable Power Amplifier | en |
| dc.subject | Voltage Regulator | en |
| dc.subject | Ultrasonic | en |
| dc.subject | ARM | en |
| dc.subject | LDO | en |
| dc.title | 基於電壓調整機制之超音波濃度量測動態範圍自動校正系統 | zh_TW |
| dc.title | Automatic Dynamic Range Correction of Ultrasonic Concentration Measurement System Based on Voltage Regulator Mechanism | en |
| dc.date.schoolyear | 110-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 王昭男(Hsin-Tsai Liu),黃翊鈞(Chih-Yang Tseng),林益煌,何昊哲 | |
| dc.subject.keyword | 超音波,切換式功率放大器,LDO,ARM,泥沙濃度,電壓調整, | zh_TW |
| dc.subject.keyword | Ultrasonic,Switchable Power Amplifier,LDO,ARM,Sediment Concentration,Voltage Regulator, | en |
| dc.relation.page | 73 | |
| dc.identifier.doi | 10.6342/NTU202104498 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2021-12-02 | |
| 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 |
| Appears in Collections: | 工程科學及海洋工程學系 | |
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| File | Size | Format | |
|---|---|---|---|
| U0001-3011202114560400.pdf Access limited in NTU ip range | 12.86 MB | Adobe PDF |
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