植物冠层分析仪利用鱼眼镜头和CCD图像传感器来获取植物冠层图像。通过专业软件分析,获得植物冠层的叶面积指数(LAI)和冠层其它的参数;自动水平数字相机获取150°的冠层图像,手柄上24个PAR传感器测量光合有效辐射并计算光斑。图像法测量植物冠层,仅仅获取一次冠层图像即可,简化了传统能量法要一天定点多次测量的繁复工作;同时可以躲开障碍物,选择合适测量点。
主要功能
Ø 测量冠层叶面积指数(LAI),光合有效辐射值,计算太阳光斑
Ø 可调节镜头聚焦适合不同高度的冠层测量,从低矮植物到林木均可使用
Ø 镜头自动水平,一次成像,测量不受天气、光线影响,无需天空空白对照测量
Ø 无需在冠层顶部做参照测量
Ø 现场获取植物冠层彩色图像,并直接显示和储存,强大的冠层分析软件功能,可以手动调节阈值、自动调节阈值(OTSU),现场评估冠层内的太阳直接辐射透过系数或LAI分析空隙系数。
Ø 软件设置天顶角和方位角
Ø 用户可通过分析软件进行天空和叶片进行颜色过滤
Ø 通过GPS和罗盘功能方便定位,在植物生长季过程定点重复测量
Ø 软件进行屏蔽、躲开影响图像计算结果的人影、天空等无用图像
测量参数
Ø 植物冠层叶面积指数(LAI)
Ø 叶片平均倾角(MLA)
Ø 散射辐射透过率(Transmission Coefficient)
Ø 消光系数(Extinction Coefficient)、直接辐射透过系数(Transmission Coefficient)、叶片分布(Leaf Distribution)
Ø GPS定位信息(GPS Lock)
Ø 太阳光斑(Sunflecks)、光合有效辐射(PAR)
应用领域
广泛应用农业科学、林木科学和植物结构分析等方面,研究植物叶面积指数与生产关系、林木的冠层指标、农作物和林木的生长监测;林木内的光合有效辐射强度;对不同纬度林木的叶面积指数的变化,环境对植物观察的影响,田间农作物、树林及低矮植物冠层测量
主要技术参数
Ø 镜头视角:150°广角镜头
Ø 相机分辨:800万像素,
Ø 交互界面:7”触屏,6按键
Ø 测量时间:0.5 s
Ø 冠层分区:天顶角划分1~10;方位角划分1~10
Ø 图像分析:可对冠层图进行调节、数据分析和编辑
Ø 工作环境:5-50℃, 0-100% RH(不结露)
Ø 操作杆:400mm
Ø PAR传感器:24个
Ø 附加功能:GPS数据显示
Ø 供电:>6小时
选购指南
手柄、鱼眼镜头、操作说明、软件和便携式手提箱
林地测量模式
产地:美国CID
参考文献
原始数据来源:Google Scholar
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