超声波测距在果树冠层三维重构中的应用  

The Application on 3-D Construction of Fruit Tree Canopy Using Ultrasonic Ranging

作　　者：曾星[1,2] 俞龙[1] 孙道宗[1] 黄健[1] 

机构地区：[1]华南农业大学南方农业机械与装备关键技术省部共建教育部重点实验室,广州510642 [2]华南理工大学电信学院,广州510640

出　　处：《农机化研究》2012年第12期148-151,共4页Journal of Agricultural Mechanization Research

基　　金：2010年广东省大学生创新实验项目(2010)

摘　　要：随着计算机技术的发展和果园果树精细管理的现实需求,果树冠层的三维重构问题成为研究热点。为此,采用超声波传感器在不同高度对人工制造的模型树冠层进行水平扫描测距;将从模型树不同方位测得的探测点坐标进行坐标转换,得到同一坐标系下的模型树冠层三维点云;采用插值法重构模型树冠层三维轮廓,并计算冠层体积。试验结果表明,重构的冠层轮廓较为准确地反映了模型树的外形轮廓,冠层重构方法测得的冠层体积与模型树冠层真实体积的相对误差为3.13%。该研究为采用超声波传感器测距技术进行果树冠层三维重构与体积测量提供了前期研究基础。With the development of computer technology and the practical needs of the orchard management,so that three-dimensional reconstruction of tree canopy issue has become hot topic.In this paper,ultrasonic sensor was used to scan artificial model tree canopy in a horizontal level plane at different heights;the three-dimensional point cloud of model tree canopy were got through coordinate system transform that converted the measuring points coordinate getting from different measuring direction into the same coordinate system;the three dimensional of model tree canopy was constructed using interpolation method,and volume calculated.The experiment result show that that reconstruction of the canopy profile more accurately reflect the contour of the model tree,and canopy volume measured by canopy three dimension reconstruction method has a 3.13% relative error compared to model real volume.The studies in this paper provide preliminary studies for three-dimensional reconstruction and volume measurements of fruit tree canopy using the ultrasonic ranging.

关 键 词：果树冠层 三维重构 超声波传感器 

分 类 号：TP212.4[自动化与计算机技术—检测技术与自动化装置] S126[自动化与计算机技术—控制科学与工程]