Method for automatically adjusting flow rate of sprinkler of profiling variable spraying system of spraying machine

Abstract

The invention belongs to the field of agricultural plant protection machinery, in particular to a method for automatically adjusting the flow rate of a sprinkler of a profiling variable spraying system of a spraying machine. The invention aims to provide a method for automatically adjusting the flow rate of the sprinkler of the profiling variable spraying system of the spraying machine. PWM control signals are adopted to adjust the flow rate of the sprinkler and the air flow of a fan which is used for assisting transportation of sprayed droplets, the flow rate of the sprinkler and the air flowof the fan are set according to the type of a tree crown, and a spray bar can be adjusted according to the growth trend of the crown so as to achieve profiling spraying, so that the utilization rateof pesticide is improved effectively, the uniformity of deposition of a chemical liquid on a canopy is improved, and environmental pollution and personal injury which are caused by the drifting pesticide are reduced in the spraying process. The method has the characteristics of good applicability, high working efficiency, fast response to a control system and precise application of pesticide, andpromotion of pesticide-saving technologies is facilitated.

Description

technical field [0001] The invention belongs to the field of agricultural plant protection machinery, and in particular relates to an automatic adjustment method for the spray head flow rate of a profiling variable spraying system of a sprayer. Background technique [0002] Fruit tree spray 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. The orchard sprayer sprays continuously and invariably during the entire spraying process, which easily causes pesticide drift and loss, causing serious damage. Pesticide waste and environmental pollution, but also caused excessive pesticide residues in agricultural products. At the same time, the canopy density and leaf area index of fruit trees in different growth periods and different parts ar...

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Problems solved by technology

Such as the Chinese invention patent application "a liquid fertilizer variable application controller" (application number 201120227494.9), the amount of fertilizer required and the amount of application per unit area are set in the controller in advance, and the amount of fertilizer application is adjusted by obtaining the operating speed of the machine tool; the application number is The Chinese invention patent application of 201010225458.9 discloses an agricultural multifunctional variable controller to realize variable pressure flow control; the Chinese invention patent application "a direct injection type real-time variable concentration online mixing spray device and its control method" (application No. 201611020511.5) adopts the concentration formula to adjust the flow, but this method has the problem of drug mixing delay

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