手持式激光雷达观测玉兰物候期叶倾角变化

Using Handheld LiDAR to Observe Leaf Inclination Angels of Magnolia Denudata in Phenological Period

针对植物叶倾角研究中数据测量不够精确、数据获取费时费力的问题,文章探究了手持式激光雷达研究叶倾角的可行性。利用手持式激光雷达分别对不同月份玉兰树进行扫描,并提取叶倾角数据,探讨了玉兰树冠不同高度层叶倾角在不同生长期的变化规律以及相同叶倾角由于上倾下倾朝向不同造成的差异结果。为验证测量精度,设计了以带臂量角器和铅垂线组成的手工测量工具,并与激光雷达测量结果进行了比较,结果显示二者具有较好的一致性,平均叶倾角相差2.8°。本研究证实了手持式激光雷达观测叶倾角变化的可行性,为进一步研究不同植物叶倾角信息提供技术支撑和方法参考。

Aiming at the problems of inaccurate data measurement and time-consuming on data acquisition in the study of vegetation leaf inclination,the feasibility of studying leaf inclination by hand-held LiDAR is explored in this paper.We use handheld LiDAR to scan the Magnolia denudate tree in different months,and then investigate the changes of leaf inclination angles of different crown layers in growth stage and the contrast of same leaf inclination angles due to upward inclination and downward inclination.To verify the precision of measurement,a manual measuring tool consisting of an arm protractor and a plumb line is designed and compared with LiDAR method.The results show that the two methods are in good agreement with each other,with an average leaf inclination difference of 2.8 degrees.This study confirms the feasibility of handheld LiDAR to observe changes of leaf inclination angels,and provides technical support and method reference for further measuring leaf inclination information of different plants.