Method for quickly detecting concentration of droplet on crop leaf

Abstract

The invention provides a method for detecting the concentration of a droplet on a crop leaf based on a near infrared spectrum technology, which can achieve the purposes of non-contact, quick and accurate detection. The method comprises the following steps: 1) choosing upper-layer leaves of more than 10 plants as samples, and selecting one leaf from the upper-layer leaves of each plant as an object to be detected; 2) utilizing a spectrometer to acquire diffuse reflection near infrared spectrum data of the samples; 3) using a gas-liquid phase meter to measure the concentration value of a liquidmedicine droplet on each leaf; 4) pre-treating the spectrum data; 5) choosing a characteristic wavelength of the spectrum data; 6) building a leaf droplet concentration mathematical model based on multiple regression; and 7) forecasting the concentration value of the droplet on the leaf. By using the method for quickly detecting the concentration of a droplet on a crop leaf, the concentration value of the droplet on the leaf can be acquired in real time, thereby providing a new reference method for judging the occurrence degree of plant diseases and insect pests in the field.

Description

technical field [0001] The invention relates to a method for quickly detecting the concentration of fog droplets on crop leaves, and the technology belongs to the field of plant protection. technical background [0002] At present, the research on foliage droplets in our country is mainly through image processing technology, but image processing technology cannot give the information of the liquid medicine contained in the droplets, so a new detection method is urgently needed. [0003] In view of the above problems, we propose a method for detecting the concentration of fog droplets based on near-infrared spectroscopy. This method can achieve the purpose of quickly, non-contact, and accurate information on the amount of medicine contained in fog droplets. [0004] Chinese researchers have done a lot of research work on the research of crop foliage fog droplets. In 2008, Qiu Baijing et al. used image technology to analyze the fog droplet coverage, deposition Density was ana...

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Problems solved by technology

[0004]Researchers in China have done a lot of research work on the research of crop foliage droplets. In 2008, Qiu Baijing et al. Image analysis” uses image technology to analyze the droplet coverage and deposition density in the greenhouse, and obtains the change trend of the droplet coverage and deposition density in space; in 2008, Chen Zhigang et al. "Electrospray deposition characteristics" studies the influence of negative high-voltage charging on the deposition of liquid medicine. The charging technology improves the atomization, uniformity, penetration and adhesion of droplets, and effectively improves the utilization rate of pesticides; In 2000, Zheng Jiaqiang explored the size of fog droplets in the document "Mist Droplet Size Measurement Technology Based on Computer Vision", and established a measurement method for measuring the size of fog droplets using image technology; from the Chinese Intellectual Property Patent Search, the application number For 200710062908.5, the patent titled "a method for detecting the uniformity of spray distribution" discloses the use of image technology to obtain the distribution uniformity information of droplets; Card and preparation method thereof" discloses that the spray droplet density and the droplet size can be measured by using the test card; Relevant; at present, there is no report on the detection of leaf fog droplet concentration based on near-infrared spectroscopy at home and abroad.

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