基于地面激光雷达的田间花生冠层高度测量系统研制  

System design for peanut canopy height information acquisition based on LiDAR

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作  者:程曼[1,2] 蔡振江 Ning Wang[2] 袁洪波 Cheng Man;Cai Zhenjiang;Ning Wang;Yuan Hongbo(College of Mechanical and Electrical Engineering,Agricultural University of Hebei,Baoding 071001,China;Department of Biosystems and Agricultural Engineering,Oklahoma State University,Stillwater OK 74075,USA)

机构地区:[1]河北农业大学机电工程学院,保定071001 [2]美国俄克拉荷马州立大学生物系统与农业工程系,美国斯蒂尔沃特74075

出  处:《农业工程学报》2019年第1期180-187,共8页Transactions of the Chinese Society of Agricultural Engineering

基  金:河北省农业关键共性技术攻关专项(17227206D);河北省高等学校科学研究计划青年基金项目(QN2018081).

摘  要:在花生育种研究中对于冠层高度的获取主要依靠人工测量,不但费时费力,而且存在一定的主观性。为解决这一问题,该文构建了一个田间花生冠层高度特性表型信息获取系统,利用地面激光雷达LiDAR对花生冠层结构进行扫描,获取其三维点云数据;采用多项式曲线拟合算法对点云数据进行分析,描绘冠层的大致轮廓并确定其边界,以得到目标冠层的有效数据集;通过对有效点云数据集生成的冠层高度矩阵分析,得到冠层的高度特性。试验结果表明,利用该系统获取的花生冠层平均高度与手工测量值最小偏差为2%,最大偏差为32%,最大偏差受地形影响和植株早期冠层本身的低高度所致,平均测量偏差约为11%,位于15%的可接受范围之内。该系统可以实现田间花生冠层高度信息的快速自动化获取,减少了人力成本的投入,该研究可为花生育种研究提供参考。Plant height is a very important phenotypic trait in peanut breeding research.It is a key parameter not only indicating the growth state of peanut,but also calculating peanut biomass and yield.At present,the acquisition of peanut plant height in breeding research mainly relies on manual measurement,which is not only time-consuming and laborious,but also has certain subjectivity.Therefore,it is necessary to design a measurement system that can be used in the field and can quickly and accurately obtain the height of peanut canopy.In this study,a LiDAR-based field peanut canopy height information acquisition system was constructed,which was a mobile data acquisition platform designed for field conditions,and a data processing and analysis algorithm was developed to extract the height of peanut canopy.The sensor was equipped with a LiDAR(LMS291-05S,SICK)for scanning the peanut canopy,an RGB camera is used to capture the image of the peanut canopy,an encoder was used to record the moving distance of the system platform;all sensors were powered by a 24 V battery and all data were uploaded to a laptop.An experimental field was established with three peanut cultivars at Oklahoma State Universityˇs Caddo Research Station in Fort Cobb,Oklahoma state,USA in May and the data collections were conducted monthly from July to September 2015.There were 12 planting plots in the field,which were arranged in a straight line,and the length of each plot was 4.75 m,the interval between adjacent plots was 1.52 m,and the interval between ridges was 0.91 m in a plot.SWR,MCD and GA04S three different breeds of peanuts were planted in 12 different plots,each of which was repeated four times,and the plots of the same breed were not adjacent to each other.The ground-based LiDAR used for this research was a line-scan laser scanner with a scan-angle of 100°,an angle resolution of 0.25°,and a scanning speed of 53 ms.A wide aperture angle of 100° was used for LiDAR in order to ensure a complete scan of target canopy.As a result,the collected

关 键 词:作物 测量 图像处理 花生 冠层高度 LIDAR 田间测量 

分 类 号:S24[农业科学—农业电气化与自动化;农业科学—农业工程]

 

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