Apparatus and method for automatically adjusting spray air volume based on tree crown canopy volume

Abstract

The invention belongs to the field of agricultural plant protection machinery, and relates to an apparatus and method for automatically adjusting a spray air volume based on a tree crown canopy volume. The apparatus comprises a speed sensor, a laser scanner, brushless fans, a fan drive, and a signal control module, wherein the speed sensor is installed at the front of a sprayer and faces the ground, and is used to detect an operating speed of the sprayer, the laser scanner is arranged at the front of the sprayer and is used to collect tree crown information of fruit trees on two sides of the sprayer, the brushless fans are installed at the rear of an atomizing spray head of the sprayer, the fan drive is connected with the brushless fans to drive the brushless fans to provide a variable airvolume for the atomizing spray head. The apparatus can automatically collect the tree crown information of the fruit trees on two sides of tree rows, and automatically and independently controls a revolution speed of each single fan according to air volume algorithm, so that the air volume supply on demand is realized, the pesticide utilization rate and deposition uniformity are improved, and thereby the environmental pollution and personal injury to an operator caused by pesticide drift in the pesticide application process are reduced.

Description

technical field [0001] The invention belongs to the field of agricultural plant protection machinery, and relates to a spray air volume adjustment device for a sprayer, in particular to an automatic adjustment device and method for spray air volume based on the volume of a tree canopy. Background technique [0002] Fruit tree spraying is an effective plant protection method commonly used in nurseries and fruit trees. In my country, the automatic plant protection machinery and pesticide application technology currently used for fruit tree spraying are relatively backward, and the utilization rate of pesticides is extremely low. Wind-driven spraying is very easy to cause pesticide drift and loss, resulting in serious pesticide waste and environmental pollution, and also causes pesticide residues in agricultural products to exceed the standard. The air volume adjustment technology can improve the effective utilization rate of pesticides, improve the uniformity of pesticide liqui...

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Problems solved by technology

The above-mentioned air volume adjustment technologies all use a central axial flow fan as the air source, which is poorly adaptable to fruit trees. The air volume can be adjusted as a whole by adjusting the area of ​​the fan inlet and outlet, and the speed of the central axial flow large fan, which cannot be adjusted according to the growth of the tree crown. Adjust the local air volume. At the same time, during the working process, due to the real-time performance of the fan and the adjustment device, it is difficult to meet the operation requirements. During the spraying process, it is easy to cause problems such as pesticide drift or uneven deposition caused by the local air volume being too large or too small. Automatic to a lesser extent

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