Construction of three-dimensional model of grain based on reverse engineering | 基于逆向工程的谷粒三维模型的构建
2011
Li Hua, Nanjing Agricultural University, Nanjing (China), College of Engineering | Yin Wenqing, Nanjing Agricultural University, Nanjing (China), College of Engineering | Gao Xiang, Nanjing Agricultural University, Nanjing (China), College of Engineering
chinois. 构建谷粒的三维模型，为更加精确地分析谷粒在介质中的力学特性及运动规律提供参考。运用逆向工程理论，使用三坐标测量机获得谷粒的点云数据，导入Pro/E中进行数据处理，采用NURBS方法重构曲线，最后生成谷粒实体，得到谷粒的三维模型。重构稻谷谷粒三维模型与实物的对比结果表明，其三轴尺寸及体积误差均在5%以内。构建的稻谷谷粒三维模型在稻谷清选、分级和输送过程的力学与运动学分析中具有重要的应用价值。
Afficher plus [+] Moins [-]anglais. In order to analyze the mechanics characteristics and the law of motion between grain and mechanism more precisely, the three-dimensional model of grain was constructed. Using reverse engineering theory, the point cloud data of grain which were measured with three coordinate measuring system were imported in Pro/E and processed, and using NURBS to reconstruct curve, lastly the entity was generated, and the three-dimensional model was got. Comparing the three-dimensional reconstruction model of rice grain with the material object, it showed that their three-axis size errors and the volume error were less than 5%. The model has an important application value of mechanics and kinematics analysis in rice grain cleaning, grading and transporting.
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