Measuring crop biomass density by laser triangulation
Measuring crop biomass density by laser triangulation
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DOI：
10.1016/j.compag.2007.09.013
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发表时间：
2008-05-01
影响因子：
8.3
通讯作者：
Adamek, Rolf
中科院分区：
文献类型：
--
作者：
Ehlert, Deflef;Horn, Hans-Juergen;Adamek, Rolf
关于特定地点作物参数的信息，如植物高度、覆盖度和生物量密度，对于优化作物管理和收获过程非常重要。测量作物参数的传感器具有可接受的精度和高可靠性，价格合理，是获得这些信息的必要先决条件。在过去的几年里，激光测距传感器在许多工业应用中被采用。在农业工程中，激光测距仪测量作物参数的潜力几乎没有得到开发。本文报道了一种基于激光三角测量的2005年植被期农田作物生物量密度测量系统的设计和性能。潜力评价的主要参数为油菜、冬黑麦、冬小麦和草地作物生物量密度（与鲜物质和干物质相关）与激光反射点平均高度关系的决定系数r2。油菜、冬黑麦和冬小麦的RI值为0.93 ~ 0.99。由于草地形态特征的变化，RI在0.88 ~ 0.94范围内降低。考虑到激光测距仪可以在短时间内检测到大面积的作物林分，因此可以得出结论，在特定地点进行作物管理具有很高的潜力。(c) 2007 Elsevier B.V.版权所有
information about site-specific crop parameters such plant height, coverage, and biomass density is important for optimising crop management and harvesting processes. Sensors for measuring crop parameters with an acceptable accuracy and high reliability at a reasonable price are essential prerequisite to obtain this information. in the last years laser rangefinder sensors are adopted in many industrial applications. In agricultural engineering the potential of laser rangefinders for measuring crop parameters is nearby unexploited. This paper reports the design and the performance of a triangulation laser based system for measuring crop biomass density under field conditions in the vegetation period 2005. The main parameter for potential assessment was the coefficient of determination R 2 of the relation between crop biomass density (related on fresh and dry matter) and the mean height of the laser reflection point in crop stands from oilseed rape, winter rye, winter wheat, and grassland. In oilseed rape, winter rye and winter wheat RI was calculated in the range from 0.93 to 0.99. Caused by variable morphologic features on grassland RI was reduced in the range from 0.88 to 0.94. Taking into account that large crop stand areas can be sensed by a laser rangefinder in a short time, a high potential for site specific crop management can be concluded. (c) 2007 Elsevier B.V. All rights reserved.