| 摇臂式喷头内流道曲面的逆向重构研究 |
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| 引用本文： | 徐琳,韩文霆.摇臂式喷头内流道曲面的逆向重构研究[J].农机化研究,2011(10). |
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| 作者姓名： | 徐琳 韩文霆 |
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| 作者单位： | 西北农林科技大学机械与电子工程学院;西北农林科技大学中国旱区节水农业研究院;中国科学院水利部水土保持研究所; |
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| 基金项目： | 国家自然科学基金项目(51079140); 西北农林科技大学基本科研业务费项目(Z109021008) |
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| 摘 要： | 用线切割机床将雨鸟30IBH摇臂式喷头内流道切割成a,b两部分,使三维光学扫描仪的投影光束能够到达其表面进行多视扫描,获取不同视角下流道a,b的点云数据。去除多视点云中的噪点后,用三点法拼接多视点云,得到流道a,b的点云数据;再将流道a,b的点云数据拼接成喷头内流道的点云数据;采用弦偏差采样法将点云数据精简后,用基于边的方法把点云分割成喷管和小喷嘴两部分,选择非均匀有理B样条(NURBS)模型分别按照点-线-面的顺序进行曲面重构。曲面重构的精度分析结果表明,最大几何误差为0.292 9mm,平均几何误差为0.076 2mm,满足预期的精度要求,实现了摇臂式喷头的内流道曲面重构。
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| 关 键 词： | 喷头 流道 逆向工程 点云 曲面重构 |
Surface Reconstruction of Internal Runner of Impact Sprinkler Using Reverse Engineering Methods |
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| Xu Lina,b,Han Wentingb.Surface Reconstruction of Internal Runner of Impact Sprinkler Using Reverse Engineering Methods[J].Journal of Agricultural Mechanization Research,2011(10). |
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| Authors: | Xu Lina b Han Wentingb |
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| Institution: | Xu Lin1a,1b,Han Wenting1b,2(1.Northwest A & F University a.College of Mechanical and Electric Engineering,b.Institute of Water Saving Agriculture in Area Regions of China,Yangling 712100,China,2.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,China) |
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| Abstract: | In order to get the point clouds of internal runner of RainBird 30IBH impact sprinkler by 3D laser scanner,using a linear cutting machine,cut the runner into two parts so that the laser beams can arrive.Then scan the two parts and get their multi-view point clouds separately.Using three control points method to register multi-view point clouds after noise filtering to get the point clouds of the two parts.Then,get the point cloud of internal runner of sprinkler by registering the point clouds of the two par... |
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| Keywords: | sprinkler runner reverse engineering point clouds surface reconstruction |
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