Application Of Unmanned Electrostatic Spraying Apparatus Unmanned Helicopter Based On The Deposition Effect

Chemical pesticides as a main approach to combat pests of agriculture and forestry, to protect crop yield increase per year made a great contribution. But now due to the strong demand for environmental protection, as well as a large area of crops planted concentrated spraying needs. Fast, efficient, environmental pollution prevention and control of biological disasters way more attention in the field of plant protection, improve our response to large-scale, large-scale insect pest sudden ability to achieve large-scale intensive crop protection mode. In recent years, combined with the rapid development of unmanned helicopter spraying technology, design an electrostatic spray system on the basis of the unmanned helicopter spraying system, and the entire system of theoretical research and experimental analysis is important. The main contents and conclusions are divided into the following four parts.(1) Electrostatic spraying atomizing motor management principles and the Netherlands were analyzed by performing electrostatic spraying system set up on the basis of an existing electrostatic nozzle on an electrostatic spray atomization process, charging process and the deposition process theoretical analysis. By using Faraday cup as the sampling means and with the choice of a precision stopwatch microammeter and put points on the current value and the time value measured for electrostatic spraying droplets under different voltage charge to mass ratio test. Obtained when the electrostatic voltage of 30 V power supply when the electrostatic voltage charging effect. Get the maximum state of charge of charge to mass ratio can be obtained 2.28mC/kg.(2) Build a test platform for constant spray of flow characteristics of the selected TXVK-6 nozzle, the droplet diameter were analyzed. Constant pressure control principle, the principle of single-phase AC chopper to sort out, and the spray angle nozzle, the test stand by the line pressure control accuracy measurement and testing. While using Matlab software 0.1Mpa, 0.2Mpa, three-dimensional distribution of the mist nozzles were analyzed under 0.3Mpa. The applicator has been deposited at the distribution variation of different pressures.(3) Set up a simulated rotorcraft spray test platform. Servo motor and belt drive slider and non-oil slide as the basic structure of the mechanical movement. Using PLC as the control, use industrial fans simulated helicopter rotor blast. After the surge of delivery, significantly lower coefficient of variation. By horizontal sedimentary study found that there is wind drift without electricity increased 47.4%, no wind, there is an increase of 16.8% under the power situation, the wind drift under a live voltage increased 36.2%.(4) Unmanned helicopter airborne electrostatic spraying test, using water-sensitive paper as a simulation target device. Flight test water-sensitive paper deposition test, the test results better than the electrostatic spray droplet non-static, especially on the back of deposition effects. Positive electrostatic spray deposition rate increase of 25.1% over the non-electrostatic spray. Electrostatic spraying the back of deposition rate 2.01 times the effect of non-electrostatic spray.