Device and method for near-infrared polarization detection of crop water stress

Abstract

The invention relates to a device and a method for polarization detection of crop water stress. The device comprises a computer, a control module, a data acquisition card, a near-infrared polarization hyper spectral imaging sensor, a halogen light source, an electrical control light source rocker arm, an electrical control detection rocker arm, an electrical control rotary sample table and an instrument rack, wherein the computer drives the electrical control light source rocker arm, the electrical control detection rocker arm and the electrical control rotary sample table to ensure that the halogen light source, the near-infrared polarization hyper spectral imaging sensor and a sample to-be-detected are positioned in detection positions. The method comprises the following steps: acquiring near-infrared polarization hyper spectral data cube of a crop leaf; extracting the optimal wavelength of crop leaf water content; acquiring combined characteristic variables such as polarization degree distribution, reflection strength distribution, stocks parameters, texture, and gray average for crop water content detection; and establishing a crop water content detection mold. Compared with the conventional method, the method has the advantage that intensity distribution, polarization and hyper spectral imaging multidimensional optical information can be acquired synchronously, so as to realize accurate quantitative analysis of crop water stress.

Description

technical field [0001] The invention relates to a crop water stress detection device, in particular to a crop water stress detection device based on near-infrared polarization hyperspectral imaging technology, and also relates to a detection method using the device. Background technique [0002] For a long time, the diagnosis of crop water stress has been obtained indirectly by measuring the stomatal conductance of plant leaves, leaf water potential, canopy temperature, transpiration rate, and changes in plant stem diameter, or by dry and wet weight methods. These methods are not only time-consuming and laborious, and have poor timeliness, but also cause damage to crops. At present, the non-destructive testing technology based on spectral and visual technology has developed rapidly, but the non-destructive testing method based on spectral technology usually uses point source sampling, which cannot reflect the difference in light reflection characteristics of the entire leaf ...

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Problems solved by technology

At present, there are no relevant documents and reports on crop water stress analysis using near-infrared polarization hyperspectral imaging technology at home and abroad.

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