Method, device and system for measuring deposition distribution condition of fog drops

Abstract

The invention relates to a method, device and system for measuring the deposition distribution condition of fog drops. The method comprises the steps of illuminating an area at the lower part of a fog drop spray device; shooting the illuminated area when no fog drop falls off to obtain a background image; shooting the illuminated area when the fog drops fall off to obtain multiple fog drop images; subtracting the background image from each fog drop image to obtain a corresponding particle grey image; and determining the distribution condition of the fog drop deposition amount of the illuminated area according to various particle grey images. According to the method, device and system for measuring the deposition distribution condition of the fog drops, motion of a wind farm and the fog drops is not disturbed, and the method, the device and the system are suitable for small-range, long-term and large-flow spray tests, and are especially suitable for analysis of the deposition distribution of the fog drops under the influence of downwash flow of a rotor.

Description

technical field [0001] The invention relates to the technical field of agricultural precision measurement, in particular to a method, device and system for measuring the distribution of fog droplet deposition. Background technique [0002] With the development of modern precision agricultural technology, plant protection and pesticide application technology has been widely used in the agricultural field. In aerial plant protection operations in areas such as forests and fields, the ground deposition characteristics (Deposition) of the liquid medicine directly affect the control effect. high and low to measure. [0003] At present, the methods for measuring the droplet deposition rate include cotton thread method, water-sensitive paper method, and fog-collecting tank method. A spectrophotometer measures the droplet deposition. The main advantage of this method is that it has a large statistical range, fast deployment time, and is suitable for the statistics of the droplet ...

AI Technical Summary

Problems solved by technology

Compared with the cotton thread method, more droplet deposition information can be obtained, including droplet particle size distribution, etc., but it has problems such as high measurement cost, slow arrangement speed, large interference to droplet movement, and low spatial resolution of measurement. , there is also the problem that it is impossible to count the long-term and large-flow droplet spray deposition rate due to the easy saturation of water-sensitive paper

Among them, the fog-collecting trough method can solve the problem of long-term and large-flow droplet spraying deposition rate, but it greatly changes the external wind field environment that affects the droplet movement, and it is impossible to count the droplet size distribution and droplet size distribution. Accumulative change law of deposition over time

[0004] At present, in agricultural aviation plant protection operations, the use of multi-rotors and helicopters for plant protection operations is increasingly developed, and the droplet deposition has the characteristics of small distribution range, large air flow influence, and large spatial distribution density of droplets. However, the above-mentioned existing fog There are some defects in the measurement method of droplet deposition rate. For the research on the distribution of droplet deposition during the multi-rotor and helicopter plant protection operations affected by the downwash airflow of the rotor, the reliability is low.

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