Rapeseed drought diagnosis method and device based on nuclear magnetic resonance robot

Abstract

The invention discloses a rapeseed drought diagnosis method and device based on a nuclear magnetic resonance robot, wherein the rapeseed drought diagnosis method includes the following steps: after calibrating, correcting and matching a binocular stereo vision camera, collecting an image of a rapeseed sample under a uniform illumination environment Information and preprocessing; image segmentation of rapeseed leaves, select target leaves, and use the centroid coordinates of the target leaves as feature points for visual positioning; convert the image coordinates of feature points into three-dimensional coordinates in space, and move the nuclear magnetic The resonance sensor makes the target leaf at the feature point within the detection range of the nuclear magnetic resonance sensor; the CPMG pulse sequence test is performed on the target leaf through the nuclear magnetic resonance sensor, and the pattern recognition method is used to discriminate and analyze the degree of drought. The invention overcomes the disadvantage of manually placing samples in the traditional detection process, improves the detection rate and provides the possibility for the online monitoring application of nuclear magnetic resonance.

Description

technical field [0001] The invention relates to the technical field of nuclear magnetic resonance spectroscopy, in particular to a method and device for diagnosing rapeseed drought based on a nuclear magnetic resonance robot. Background technique [0002] Water plays a vital role in the life activities of land plants. During the growth process, crop leaves are the most direct organ for water content. When subjected to drought stress, crops quickly sense changes in the growth environment and produce emergency adaptation mechanisms, such as reducing the growth rate of leaves and aggravating shedding to achieve the purpose of slowing down the transpiration rate and preventing excessive water loss. Therefore, the leaf can be used as the detection object to diagnose the drought of the plant, so as to infer the soil environment of the crop, and provide guidance for agricultural irrigation work. [0003] The nuclear magnetic resonance technology is a spectral technology based on ...

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Problems solved by technology

[0004] Nuclear magnetic resonance technology is becoming more and more popular in the medical field due to its advantages of no radiation damage and high resolution, but there are relatively few nuclear magnetic resonance research and devices for plant detection

And among a small number of existing portable NMR devices, most of them are based on an open detection platform. When detecting the living body of plants, it is necessary to artificially place the parts of the plants to be tested in the detection area of ​​the sensor in advance, and the long-term detection is easy. It will lead to physical fatigue of the operator and reduce the detection speed. At the same time, it will increase human error and reduce the detection effect

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