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研究生:陳家能
研究生(外文):Jia-Neng Chen
論文名稱:使用影像量測船模波形之研究
論文名稱(外文):Study on the Measurement of Ship Model Wave Pattern By Video Image
指導教授:蔡進發蔡進發引用關係
指導教授(外文):Jing-Fa Tsai
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:造船及海洋工程學研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2000
畢業學年度:88
語文別:中文
中文關鍵詞:波高量測波形量測波高計
外文關鍵詞:wave heightwave pattern
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本文的主要目的是建立一快速而有效的船模興波三維波形的量測與分析系統。使用雷射光幕投射至佈滿保利龍微粒的自由水面,產生一垂直船行方向的光幕,船模所產生的波浪經過此光幕位置時,會形成二維波形剖面的影像,以CCD 儲存船行經過雷射光幕時的所有二維影像,再以影像處理的技術辨識所有波形的座標,最後利用船速將時間序列上二維的波形資料,重建成三維的船模波形資料。本研究所建立的分析軟體,其內容包括基本影像處理的功能、觀察Y軸強度變化、尋找區域、計算區域座標值等,可在此平台上測試或編輯演算的方法與程序,找到最佳的演算法。

The purpose of this study is to establish a measurement and analysis system of a 3-D data of wave patterns generated by a ship model. The results can be used for the computation of the wave resistance and to optimize the ship design.
The approach to measure the wave patterns is to cast a thin light sheet onto the water surface. The image of wave pattern was photographed by a CCD camera. 2-D data of the surface profile along a line normal the sailing line is recorded in this photograph. The visibility of the wave surface is improved by scattering small particles onto the water. 3-D wave pattern can be reconstructed from the 2-D surface-profile time-history of the wave pattern as the ship model passed by the sheet light.
The analysis software is developed by Borland C++ Builder 4.4 . Image processing techniques and algorithms were used to process original images and generate the wave heights. Then the 3-D wave patterns were displayed by perspective images and contour maps.

第一章 緒論……………………………………………….1
1.1 研究動機……………………………………………….1
1.2 研究目的……………………………………………….3
1.3 研究方法……………………………………………….3
第二章 船模波形量測實驗系統………………………….4
2.1 實驗設備……………………………………………….4
2.2 實驗方法與過程……………………………………….6
2.2.1 設定量測區域………………………………….6
2.2.2 撒入微粒……………………………………….6
2.2.3 射入雷射光製造雷射光幕…………………….6
2.2.4 用CCD取像………………………………………7
2.3 影像系統校正………………………………………….8
第三章 影像分析………………………………………….9
3.1 影像數位化…………………………………………….9
3.2 原始影像分析………………………………………….10
3.2.1 原始影像……………………………………….10
3.2.2 座標系統……………………………………….10
3.2.3 奇次場與偶次場影像………………………….11
3.2.4 掃瞄線………………………………………….11
3.2.5 船身的意義…………………………………….12
3.3 影像前級處理(Preprocessing)………………………13
3.3.1 雜訊與失真…………………………………….13
3.3.2 去除雜訊……………………………………….13
3.3.3 影像扭曲(Distortion)……………………….13
3.4 影像分割……………………………………………….14
3.4.1 烏龜演算法(Papert’s Turtle Algorithm).14
3.4.2 尋找船身……………………………………….15
3.4.3 分割影像……………………………………….15
3.5 產生波高值…………………………………………….16
3.5.1 取初始值……………………………………….16
3.5.2 產生波高值…………………………………….16
第四章 結果與討論……………………………………….17
4.1 量測區域與量測速度………………………………….17
4.2 船模速度與所得曲線的關係………………………….17
4.3 浪花(Spray)……………………………………………17
4.4 波形等高線圖(Contour)………………………………18
4.5 波形立體圖…………………………………………….19
4.6 波形剖面圖…………………………………………….19
4.7 艏波角度與最大波高………………………………….19
第五章 結論與建議……………………………………….20
5.1 結論…………………………………………………….20
5.2 建議事項……………………………………………….21
參考文獻………………………………………………………23
附錄 A ………………………………………………………66
附錄 B ………………………………………………………72

[1] J. M. Killen, “Capacitive wave profilez recorder,” Conf.
Coastal Eng. Instrum., Berkeley,Calif.,1956, pp.32-38.
[2] R. L. Wiegel, “Parallel-wire resistance wave meter,”
Conf. Coastal Eng. Instrum.,Berkeley, Calif. ,1956,
pp.39-43.
[3] L. C. Williams, “CERC Wave Gates,” Tech. Memo 30. Army
Corps Eng. Coastal Eng. Res. Cent., Washington, D.C.
[4] H. O. Berteaux, Buoy Engineering, John Wiley & Sons, 1976.
[5] M. J. Dipper, “Ship-Borne Wave Height Measurements,”
Marine Technology, Vol. 34, No. 4, Oct. 1997, pp. 267-275.
[6] 陳嘉元、高源國, ”波浪量測與浮標測波儀介紹˝ ,科儀新知,
第六期,1993年6月,第46-54頁。
[7] 黃明志, “沿岸海況浮標之設計與實測研究(II)”, 國科會研究
報告,1993年。
[8] T. Inui, “Wave-making resistance of ships,”Soc. Nav.
Architects Mar. Eng. Trans.70,1962, pp.283-353,
[9] A. Marussi, “Stereophotogrammetric apparatus for the study
of waves generated by ship models,” Int.
Shipbuilding Progr.(Rotterdam) 2, 1955, pp.537-538.
[10] F. H. Moffitt, “Mapping of Ship Waves Breaking on a
Beach,” Tech. Rep. HEL-12-8. Univ. of California,
Berkeley, California.
[11] R. M. Sorensen, “Stereophotogrammetric analysis of wave
surfaces,” Proc. Amer. Soc. Civil Eng. 94(HY1), 1968,
pp.181-194.
[12] F. H. Moffitt, “Wave Surface Configuration,”
Photogrammetric Engineering 34, 1968, pp.179-188.
[13] L. P. Asams and J. D. Pos, “Wave Height Measurement in
Model Harbours Using Close Range Photogrammetry,”
International Archives of Photogrammetry & Remote Sensing,
Rio de Janeiro, Vol. 25/A5, 15. ISPRS Congress, 1984,
pp.9-18.
[14] G. I. Snyder and B. M. Baldwin and T. J. Ratcliffe,
“Measurement of the Wave Pattern Generated by a Ship Model
Using Close-Range Photogrammetry,” Proc. Int. Conf. On
Analytical Instrum., ISPRS Commission II, WG II/1,
Phoenix/Arizona,Amer. Soc. Of Photogrammetry & Remote
Sensing, Falls Church,1988, pp.411-416.
[15] A. Georgopoulos and C. Ioannidis and C. Potsiou and J.
Badekas, “Photogrammetric Wave Profile Determination,”
Photogrammetry & Remote Sensing, Vol. 27/B5, 16. ISPRS
Congress,Kyoto, 1988, pp.203-212.
[16] R. M. Sorensen, “Ship-Generated Waves,”
Advances in Hydroscience, Vol. 9, Academic Press, New York
and London, 1973, pp.49-83.
[17] J. Peipe, “Digital object models of water surfaces,”
SPIE Vol. 1395 Close-Range Photogrammetry Meets Machine
Vision,1990, pp.809-815.
[18] R. J. Adrian, “Particle-Imageing Techniques For
Experimental Fluid Mechanics,” Annu. Rev. Fluid Mech.,
Vol. 23,1991, pp.261-304.
[19] R. C. Gonzalez, P. Wintz,Digital Image Processing,
Addision-Wesley Publishing Company, 1992.
[20] R. Jain and R. Kasturi and B. G. Schunck, Machine Vision,
McGraw-Hill, Inc., 1995.
[21] R. J. Schalkoff, Digital Image Processing and Computer
Vision, John Wiley & Sons, Inc., 1989.
[22] W. K. Pratt, Digital Image Processing, Los Angeles,
California, 1978.
[23] A. Rosenfeld and A. C. Kak, Digital Picture Processing,
Academic Press, 1982.
[24] I. Pitas, Digital Image Processing Algorithms,
Prentice-Hall, 1993.
[25] 林政宏, “二維粒子影像速度儀分析軟體之研究”,國立台灣大學
造船及海洋工程學研究所碩士論文, 1996年。

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