| 基于变形能的机械采收钙果果实碰撞损伤评估 |
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| 引用本文： | 何永强,贺俊林,房大伟,杜晓斌.基于变形能的机械采收钙果果实碰撞损伤评估[J].农业工程,2019,9(3):67-72. |
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| 作者姓名： | 何永强 贺俊林 房大伟 杜晓斌 |
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| 作者单位： | 山西农业大学工学院，山西 太谷030801 |
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| 基金项目： | 山西省重点研发计划（项目编号：201703D221029-1） |
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| 摘 要： | 为了评估机械采收钙果与设备碰撞导致果实内部损伤严重程度。通过建立果实变形量与变形能关系方程，以变形能大小评价果实损伤程度。钙果果实准静态压缩试验表明，变形能＜28.56×10-3 J时，果实轻度损伤。变形能为（28.56～195.57）×10-3 J时，果实产生不同程度的中度损伤、重度损伤和破裂损伤；钙果动态下落碰撞试验表明，随着钙果质量的增大，反弹高度按二次曲线规律下降（r2=0.880 7）。随着下落高度的增大，反弹高度按三次曲线规律增大（r2=0.825 5）。变形能均线性增大（r2≥0.994 2），最大为43.9×10-3 J，重度损伤等效下落临界高度为2.97 m。该研究可为钙果采收机械结构、作业参数的选择提供参考。
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| 关 键 词： | 机械采收 钙果 损伤 变形能 评估 |
| 收稿时间： | 2018/11/13 0:00:00 |
| 修稿时间： | 2018/12/17 0:00:00 |
Collision Injury Assessment of Mechanical Harvesting Cerasus humilis Fruit Based on Deformation Energy |
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| HE Yongqiang,HE Junlin,FANG Dawei and DU Xiaobin.Collision Injury Assessment of Mechanical Harvesting Cerasus humilis Fruit Based on Deformation Energy[J].Agricultural Engineering,2019,9(3):67-72. |
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| Authors: | HE Yongqiang HE Junlin FANG Dawei and DU Xiaobin |
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| Abstract: | In order to evaluate degree of damage caused by collision between Cerasus humilis and equipment.Relationship equation of fruit deformation and deformation energy was established to evaluate degree of fruit damage.The quasi-static compression test showed that deformation energy was less than 28.56×10-3 J，and the fruit was slightly damaged.When the deformation energy was（28.56~195.57）×10-3 J，the fruit produces different degrees of moderate damage，severe damage and rupture damage.The drop impact test of Cerasus humilis fruit showed that bounce height decreases as the mass of fruit increases（r2=0.880 7）.As the falling height increased，the rebound height increased in accordance with the cubic curve（r2=0.825 5）.The deformation energy increased linearly（r2≥0.994 2），and the maximum was 43.9×10-3 J.Critical height of equivalent damage was 2.97 m.Mechanical harvesting can meet requirements of Cerasus humilis fruit picking. |
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