基于立体视觉的聚焦波作用下方形立柱近场波浪的三维测量
3D measurement of near-field waves around a square column under focused wave action based on stereo vision
李德玉 1肖龙飞 1魏汉迪 1李琰2
作者信息
- 1. 上海交通大学 三亚崖州湾深海科技研究院,海南 三亚 572000;上海交通大学 海洋工程国家重点实验室,上海 200240
- 2. 上海交通大学 海洋工程国家重点实验室,上海 200240
- 折叠
摘要
准确测量结构物的近场波浪演化是研究波浪与结构物相互作用问题的一个重要前提.针对固定方形立柱的聚焦波试验,提出基于立体视觉的近场波浪测量方法.使用轻质泡沫颗粒制成的标记网来标记波面以获得有丰富纹理的波面图像,在立柱前后各布置一个双目系统,全方位覆盖立柱周边区域,重建出聚焦波作用过程中立柱周围的三维波浪场,从空间分布的角度研究波浪爬升的三维演化.从连续图像序列的处理中可提取出波浪时历,与浪高仪的测量结果吻合良好.结果表明,立体视觉方法可以准确重建结构物的近场波浪演化,测量极端波浪下的波浪爬升.
Abstract
Accurately measuring the near-field wave evolution around structures is a crucial prerequisite for studying wave-structure interactions.For focused wave tests on a fixed square column,a near-field wave measurement method based on stereo vision is proposed.A marker-net made of lightweight foam particles is used to mark the wave surface to obtain the images with sufficent texture.A binocular system is arranged in front of and behind the column to comprehensively cover the surrounding area,reconstructing the three-dimensional wave field around the column in focused wave-column interaction.The three-dimensional evolution of wave run-up is studied from the perspective of spatial distribution.Wave time histories extracted from the continuous image sequences show good agreement with the measurements from wave probes.The results indicate that the stereo vision method can accurately reconstruct the near-field wave evolution around the square column and measure wave run-up under extreme waves.
关键词
波浪场测量/三维重建/立体视觉/方形立柱/图像分割/聚焦波/波浪爬升Key words
wave field measurement/3D reconstruction/stereo vision/square column/image segmentation/focused wave/wave run-up引用本文复制引用
基金项目
国家自然科学基金重点资助项目(52031006)
三亚崖州湾科技城科技专项资助项目(SCKJ-JYRC-2022-82)
海南省自然科学基金资助项目(521QN275)
出版年
2024
NETL
NSTL
万方数据