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Development and application of a novel crop stress and quality instrument

机译：一种新型农作物胁迫品质检测仪的开发与应用

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摘要

In this paper, a portable diagnostic instrument for crop quality analysis was designed and tested, which can measure the normalized difference vegetation index (PRI) and structure insensitive pigment index (NRI) of crop canopy in the field. The instrument have a valid survey area of 1 m X 1 m when the height between instrument and the ground was fixed to 1.3 meter The crop quality can be assessed based on their PRI and NRI values, so it will be very important for crop management to get these values. The instrument uses sunlight as its light source. There are six special different photoelectrical detectors within red, blue and near infrared bands, which are used for detecting incidence sunlight and reflex light from the canopy of crop. This optical instrument includes photoelectric detector module, signal process and A/D convert module, the data storing and transmission module and human-machine interface module. The detector is the core of the instrument which measures the spectrums at special bands. The microprocessor calculates the NDVI and SIPI value based on the A/D value. And the value can be displayed on the instrument's LCD, stored in the flash memory of instrument and can also be uploaded to PC through the PC's RS232 serial interface. The prototype was tested in the crop field at different view directions. It reveals the on-site and non-sampling mode of crop growth monitoring by fixed on the agricultural machine traveling in the field. Such simple instruments can diagnose the plant growth status by the acquired spectral response.
机译：本文设计并测试了一种用于作物品质分析的便携式诊断仪器，该仪器可以测量田间作物冠层的归一化差异植被指数（PRI）和结构不敏感色素指数（NRI）。当仪器与地面之间的高度固定为1.3米时，仪器的有效测量区域为1 m X 1 m。可以根据其PRI和NRI值评估作物质量，因此对于作物管理而言非常重要。得到这些值。仪器使用阳光作为光源。在红色，蓝色和近红外波段内有六个特殊的光电检测器，用于检测入射光和来自农作物冠层的反射光。该光学仪器包括光电探测器模块，信号处理和A / D转换模块，数据存储和传输模块以及人机界面模块。探测器是仪器的核心，可以测量特殊频段的光谱。微处理器根据A / D值计算NDVI和SIPI值。该值可以显示在仪器的LCD上，存储在仪器的闪存中，也可以通过PC的RS232串行接口上​​传到PC。原型在作物田中以不同的视角进行了测试。它揭示了固定在田间行驶的农机上的作物生长监测的现场和非采样模式。这种简单的仪器可以通过获取的光谱响应来诊断植物的生长状况。

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