Method for quickly detecting concentration of droplet on crop leaf

A leaf surface and droplet technology, applied in measuring devices, color/spectral characteristic measurement, material analysis through optical means, etc., can solve problems such as unreported reports, and achieve reliable measurement results, accurate measurement, and high measurement accuracy Effect

Active Publication Date: 2011-07-20
JIANGSU UNIV
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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 "M

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  • Method for quickly detecting concentration of droplet on crop leaf

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Embodiment Construction

[0019] In order to better understand the technical scheme of the present invention, further explanation is as follows:

[0020] ⑴ sample selection

[0021] Under the spray conditions of different concentrations of medicinal liquid, select the upper leaves of more than 10 plants from the same crop as samples, and select one leaf from the upper leaves of each plant as the test object.

[0022] ⑵Scan Spectrum

[0023] Using a portable on-site spectrometer, scan the sample 10 times in the spectrum of 350nm to 2500nm and average it into a spectral data; the spectral resolution is 3nm in the range of 350nm to 1000nm, and 10nm in the range of 1000nm to 2500nm; according to the actual height of the plant , using a lens with a field of view angle range of 8° to 25°, the vertical blade surface of the detector head is 10cm to 30cm away from the blade to form a suitable field of view, and the near-infrared diffuse reflectance spectrum data of the sample is collected.

[0024] (3) Measu...

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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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Application Information

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IPC IPC(8): G01N21/35G01N21/359
Inventor 邱白晶殷磊杨宁徐溪超邓斌
Owner JIANGSU UNIV
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