A visualization device and control method for the fog flow field of a rotor UAV

Abstract

The invention relates to a visualization device for a fog flow field of an unmanned gyroplane, and a control method. The device comprises a test section of a wind tunnel, an unmanned plane, a telescopic suspension system, a laser emitter, a short pulse ultraviolet radiator, a camera, a computer, and a tracer particle smoke generator. The unmanned plane is fixed in the test section of a wind tunnel through the telescopic suspension system. A medicine tank holds a fluorescence solution. The laser emitter is placed right above the rotor wing of the unmanned plane, and is used to irradiate and display a turbulent flow field below the rotor wing in the test section of the wind tunnel. The short pulse ultraviolet radiator is placed out of the test section of the wind tunnel, and is slantly below the unmanned plane. The tracer particle smoke generator is on a wind inlet of the test section of the wind tunnel. The camera is connected with the computer, and is used to obtain tracer particle image information representing motion law of unmanned plane rotor wing fog flow field, and transmit the image information to the computer to process. The device is simple in operation, high in controllability, good in repeatability, and high in result reliability.

Description

technical field [0001] The invention relates to agricultural aviation and aerial plant protection technology, in particular to a visualization device and control method for the deposition and drift characteristics of droplets under the action of a rotor wind field when an agricultural rotor drone is used for aerial spraying. Background technique [0002] my country's agricultural diseases, insect pests and weeds have the characteristics of multiple, re-occurring, and frequent occurrences, which seriously threaten my country's agricultural production and national food security. With global warming and changes in farmland ecological conditions, crop diseases and insect pests are increasing year by year, and the scope of disease is expanding year by year. At present, the plant protection operations in China's food crop production process are still mainly manual and semi-mechanized operations. Plant protection operations require a lot of labor and labor intensity, and poisoning i...

AI Technical Summary

Problems solved by technology

The cost of field experiment measurement is high, and the repeatability of the test results is poor due to the influence of climate and other conditions, and it is impossible to directly observe the real trajectory of the fog droplets under the action of the rotor flow field

The CFD method can be used to visually see the simulation results of the fog flow field simulated by the computer, but the accuracy of CFD is affected by various aspects such as geometric models, boundary conditions, turbulence models, and the number of units. To obtain more accurate simulation results, must be verified by testing

[0006] To sum up, in the current research methods on the fog flow field of rotor UAVs, it is difficult to directly observe the movement trajectory of the fog droplets under the action of the rotor wind field, and the field test measurement method at this stage cannot be obtained from Understanding the drift and deposition of droplets from the rotor flow field and the movement mechanism of droplets itself restricts the effectiveness of aerial spraying of agricultural drones and the utilization of pesticides at this stage

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