Unmanned aerial vehicle spraying control system and method based on flow dynamic prediction

Abstract

The invention provides an unmanned aerial vehicle spraying control system and method based on flow dynamic prediction. The system comprises a pressure sensor and a controller, wherein the pressure sensor is respectively connected with the controller and a spraying system on an unmanned aerial vehicle; the controller is connected with the spraying system on the unmanned aerial vehicle; the pressure sensor is used for obtaining a real-time pipeline pressure of the spraying system and transmitting the real-time pipeline pressure to the controller; and the controller is used for predicating pipeline flow according to the real-time pipeline pressure and a corresponding relation between the pipeline pressure and the nozzle spraying flow of the spraying system and also used for controlling the pipeline flow of the spraying system on the unmanned aerial vehicle according to the obtained pipeline flow predicated value and a preset pipeline flow. Through adoption of the system provided by the invention, the spraying amount of each acre of operation area can be accurately and dynamically controlled in the speed changing process and a situation of large spraying flow error caused by manual operation can be also avoided.

Description

technical field [0001] The invention relates to the technical field of aerial spraying operations, in particular to a spraying control system and method for drones based on flow dynamic prediction. Background technique [0002] Aerial spraying operations are an important means of modern agricultural plant protection operations. In the field of aerial pesticide application operations, precise pesticide application by drones is the future technological development trend. At present, the spraying system (including: small diaphragm pump, pipeline and pressure sprinkler) is usually installed on the plant protection drone. According to the condition of the crop, the spraying amount per mu is set, and the working voltage of the pump is set before the aircraft takes off. Determine the fixed pressure of the pipeline, so that the flow rate is constant. After the aircraft takes off, the remote control hand visually watches the drone fly to the operation area, then turns on the spray s...

AI Technical Summary

Problems solved by technology

[0003] In the actual application process, affected by factors such as meteorological conditions, environmental conditions, and operator skill level, it is difficult to maintain a constant flight speed of the UAV, especially in the initial stage of entering the operation area, turning around and other links with a large range of speed changes. When the spraying operation is carried out according to a fixed flow rate, it will lead to uneven spraying of the liquid medicine, excessive spraying and insufficient spraying.

Some plant protection drones use micro-turbine flow sensors to detect and feedback the flow, but the output lag of the turbine flowmeter is relatively serious, and when the flight speed changes, it is easy to cause the spray flow to fluctuate and change. Therefore, it is difficult to meet the requirements in actual operations. Real-time requirements for flow control

[0004] In view of this, how to provide an unmanned aerial vehicle spraying control system to solve the problem of large spraying flow error in the process of speed change in the prior art has become a current technical problem to be solved

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