| 丘陵山地果树冠层体积激光测量方法与试验 |
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| 引用本文： | 俞龙,黄健,赵祚喜,张霖,孙道宗.丘陵山地果树冠层体积激光测量方法与试验[J].农业机械学报,2013,44(8):224-228. |
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| 作者姓名： | 俞龙 黄健 赵祚喜 张霖 孙道宗 |
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| 作者单位： | 华南农业大学;华南农业大学;华南农业大学;华南农业大学;华南农业大学 |
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| 基金项目： | 国家自然科学基金资助项目（1175081）、农业部“948”重点资助项目（2011-G32）和高等学校博士学科点专项科研基金资助项目（0114404110003、20124404120005） |
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| 摘 要： | 树冠体积是农药变量喷施、肥料精准施用和果产预估等果园精细管理的重要因素。为了克服丘陵山地果园地面不平整和果树种植不规整等因素对果树冠层体积激光测量方法的影响，搭建了果树冠层体积激光测量平台，基于AHRS和DGPS实现定位定姿，通过空间坐标转换直接求取果树冠层激光扫描点在大地坐标系下的三维数据；并采用切片技术提取冠层点云的面、线信息，以累加方式计算果树冠层体积。测得的大地坐标系下的丘陵山地荔枝树冠层激光点云能较真实地反映果树冠层的形状特征；以3棵人工修剪的圆柱形绿篱树为靶标，冠层体积激光测量与人工测量相对误差约为5%。试验结果表明，依据果树冠层点云测量冠层体积具有较高的准确性和可靠性。
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| 关 键 词： | 丘陵山地 果树冠层 激光传感器 体积测量 姿态航向参考系统 |
Laser Measurement and Experiment of Hilly Fruit Tree Canopy Volume |
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| Yu Long,Huang Jian,Zhao Zuoxi,Zhang Lin and Sun Daozong.Laser Measurement and Experiment of Hilly Fruit Tree Canopy Volume[J].Transactions of the Chinese Society of Agricultural Machinery,2013,44(8):224-228. |
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| Authors: | Yu Long Huang Jian Zhao Zuoxi Zhang Lin and Sun Daozong |
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| Institution: | South China Agricultural University;South China Agricultural University;South China Agricultural University;South China Agricultural University;South China Agricultural University |
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| Abstract: | Fruit tree canopy volume is an important factor for precision management in fruit orchards such as pesticide variable spraying, precision fertilizing and yield estimation. In order to overcome the problems of uneven hilly environment and irregular planting on fruit tree canopy volume, a platform for measuring fruit tree canopy volume by laser was set up. Based on AHRS and DGPS sensors, 3-D data of laser scanned point of fruit tree canopy in geodetic coordinate system was deduced through spatial coordinates transforming. The area and line information of point cloud of fruit tree canopy were extracted by using slicing technology, and the canopy volume was calculated with an accumulation method. The test showed that the shape of fruit tree canopy could be represented by the canopy point cloud of litchi fruit tree in the geodetic coordinate system. Taking three artificial pruning cylindrical hedgerow trees as experimental object, the relative measuring errors between artificial measurement and laser measurement was about 5%. |
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