Citrus yellow shoot rapid detection device and detection method

Abstract

The invention provides a rapid detection device and detection method for Citrus yellow shoot. The rapid detection device comprises an image acquisition unit and a control unit; wherein the image acquisition unit comprises a shading box body as well as a polarization camera, a short-focus lens, a narrow-band LED light source, a light equalizing plate, a linear polarizer, a sample pressing plate and a sample table which are arranged in the shading box body, the short-focus lens is mounted on the polarization camera, the light equalizing plate is overlapped on the linear polarizer, and second through holes are formed in the light equalizing plate and the linear polarizer; the short-focus lens penetrates through the second through hole, the short-focus lens is tangent to the second through hole, the linear polarizer is flush with the bottommost end of the short-focus lens, and the linear polarization direction of the linear polarizer is parallel to the 0-degree direction of the polarization camera; and the light emitted by the narrow-band LED light source is subjected to light uniformizing treatment through the light uniformizing plate and then converted into linearly polarized light through the linear polaroid; finally, the linearly polarized light is collected by the polarization camera and transmitted to the control unit to be subjected to next-step treatment after being reflected and scattered by the sample. According to the invention, early-stage on-site rapid detection of the Citrus yellow shoot can be realized.

Description

technical field [0001] The invention relates to the field of detection of plant diseases, in particular to a rapid detection device and detection method for citrus huanglongbing. Background technique [0002] Citrus is the largest fruit in my country, accounting for 20.4% of the national fruit output. Citrus Huanglongbing (HLB), known for its strong infectivity and destructive power, is called "citrus cancer". It has always seriously affected the development of citrus planting in my country, and there is no cure. disease. [0003] At present, the control strategy of citrus Huanglongbing is mainly based on prevention. Early screening is carried out on the plants, and the infected plants are removed immediately to control the spread of Huanglongbing. The main detection methods include: naked eye observation method, microscope observation method, PCR detection method , near-infrared spectroscopy, etc. Among them, the naked eye observation method and the microscope observation ...

AI Technical Summary

Problems solved by technology

This method directly uses natural light as the lighting condition, which is seriously affected by outdoor light intensity and weather factors, which reduces the consistency of image acquisition and the stability of test results, and uses full-band light as the illumination source. The absorption rate of the spectrum is similar, which is not conducive to distinguishing the lesion position on the leaf surface

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