| 摘要: |
| 【目的】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。【方法】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。【结果】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。【结论】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。 |
| 关键词: 谷粒 三维模型 逆向工程 |
| DOI： |
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| 基金项目:江苏省农机局科研启动基金项目（GXZ05017）；江苏省科技支撑计划项目（BE2010356） |
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| Construction of three-dimensional model of grain based on reverse engineering |
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LI Hua, YIN Wenqing, GAO Xiang
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College of Engineering, Nanjing Agricultural University,Intelligent Agriculture Equipment Key Laboratory, Colleges and Universities in Jiangsu Province
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| Abstract: |
| 【Objective】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.【Method】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.【Result】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%.【Conclusion】The model has an important application value of mechanics and kinematics analysis in rice grain cleaning,grading and transporting. |
| Key words: grain three-dimensional model reverse engineering |
