2003 Fiscal Year Final Research Report Summary
Development of unsteady wave measurement system using remote sensing.
| Project/Area Number |
13555273
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
海洋工学
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| Research Institution | Osaka University |
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Principal Investigator |
SUZUKI Toshio Osaka Univ., Dept. of Global Architecture, Professor, 大学院・工学研究科, 教授 (80029107)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEMI Tetsuya Osaka Univ., Dept. of Global Architecture, Associate Professor, 大学院・工学研究科, 講師 (10314361)
TODA Yasuyuki Osaka Univ., Dept. of Global Architecture, Associate Professor, 大学院・工学研究科, 助教授 (20172166)
OKUNO Taketoshi Osaka Pref. Univ., Dept. of Marine System Eng., Professor, 大学院・工学研究科, 教授 (60081395)
TANAKA Hisao Universal Shipbuilding Corporation, Tech. Research Center, Chief Researcher, 技術研究所, 主任研究員
SUZUKI Hiroyoshi Osaka Univ., Dept. of Naval Architecture and Ocean Eng., Associate Professor, 大学院・工学研究科, 講師 (00252601)
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| Project Period (FY) |
2001 – 2003
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| Keywords | Unsteady Wave / Wave distribution in plane / Measurement system / Projected light distribution / Reflected image / Wave gradient / 画像計測 |
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| Research Abstract |
For the past two decades, the measurement system of the unsteady waves have been developed rapidly However, it is mainly point measurement system. In this study, image analysis methods using remote sensing were tried to get the wave distribution on one plane simultaneously and to get time history of plane data. First, the unsteady waves in the incident wave was measured by using projected light distribution method. From the images of projected light distributions, the unsteady wave could be reconstructed The higher accuracy was obtained by least square method. Secondly, the wave gradient was computed from the reflected light distribution images. The wave distribution is reconstructed by line integral. The wave can be measured by using random images or color distribution image. After investigating what kind of image is suitable for measurement, suitable width of histogram and number of particles were decided. The results agreed well with point measurement data or theory.
To apply the present method to the phenomena in the nature, some ocean model computation method was developed and computed to simulate the images.
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