基于光谱学原理的无损式作物冠层分析仪  

Non-destructive Crop Canopy Analyzer Based on Spectral Principle

作　　者：李修华[1] 李民赞[1] 崔笛[1] 

机构地区：[1]中国农业大学现代精细农业系统集成研究教育部重点实验室,北京100083

出　　处：《农业机械学报》2009年第S1期252-255,227,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金："十一五"国家科技支撑计划资助项目(2008BADA4B02);国家"863"高技术研究发展计划资助项目(2007AA10Z207)

摘　　要：设计了可以对作物氮含量进行实时监测的作物冠层分析仪。分析仪由传感器与控制器组成,通过无线方式进行数据传输。传感器包含光学部分和电路部分,光学部分包含4个光学通道和光电探测器,其中2个通道分别在610 nm与1220 nm处测量太阳辐射光,而另外2个通道在同样的2个波段上测量作物冠层的反射光;电路部分主要由电源、放大单元和无线传输模块组成。控制器内除了无线传输模块外,周边还集成了键盘、液晶显示、数据存储和上传等功能模块。详细阐述了仪器的硬件设计和软件设计。标定实验显示光学部分工作稳定,无线传输性能好。与Quality Spec高光谱仪进行的田间对比实验也取得了较好的效果,相关系数达到0.52。In order to real-time detect the plant nitrogen content,a non-destructive crop growth analyzer is developed.It is made up of a sensor and a controller.The optical part of the sensor is made up of four optical channels and four photodiodes.Two channels receive the sunlight and the other two receive the reflected light from the crop canopy at the wavebands of 610 nm and 1 220 nm.The circuit part of the sensor is made up of power supply unit,amplifying unit and a wireless module.The controller has functions such as keyboard input,LCD display,data storage,data upload,and so on.Calibration tests show that the optical part has a high accuracy and the wireless transmission also has a good performance. The field tests comparing with a commercial spectrometer(Quality Spec made by ASD Co.) also show an acceptable correlation of 0.52.

关 键 词：作物冠层 氮含量 分析仪 光谱学 

分 类 号：TP216.3[自动化与计算机技术—检测技术与自动化装置]