作物氮素营养无损监测仪的光学系统设计

摘要:

在分析作物冠层反射光谱光学特征和氮素无损监测工作原理的基础上，研究了像方光场均匀性分布、大视场小测距、操作抖动和测距不稳对光学系统监测精度的干扰, 提出了光学系统的总体设计方案、关键元件选型及其参数确定的原理和方法，分析了光学参数对测量误差的影响和控制原理，并研制了光学传感变送器。

关键词:氮素;无损监测;反射光谱;光学系统;设计

Abstract:

The optic characters of canopy reflectance spectral and the optic principle of non-destructive nitrogen monitoring were analyzed, and then the optic parameters disturbing the monitoring precision of the optic system were put forward, which included the uniformity in image optic field, the wide object field with short distance of survey, the operation dithering and the change of distance of survey. The scheme of optic system frame design, the key optic organs choosing and its optic parameters matching were proposed subsequently. Finally, the causes and control methods of the optic system measurement error were analyzed and the sample product was designed and manufactured. 

Key words:氮素;无损监测;反射光谱;光学系统;设计