Multicopter spraying module

A design of a device mounted on a multicopter for implementing the technology of spot spraying of plants is proposed. When individual small areas of the field are damaged from an environmental and economic point of view, the processing of the entire field is not advisable. The use of tractor equipped with a sprayer is often impossible due to the lack of wheeltrack and is not effective when the problem area is too small. One of the promising directions for solving this problem is the use of unmanned aerial vehicles. The aim of the work is to develop the design of the spraying module for further installation of it on a multicopter. The technology for spot processing of fields using a multicopter contains the steps of aerial photography of plants, compilation and analysis of electronic field maps, setting up a multicopter and attachments to carry out planned work, spraying point objects, and evaluating object processing results. Existing field spraying technologies involve the use of multicopter with a carrying capacity of about ten liters of working fluid. The main limitations are the high cost of the multicopter and the impossibility of spot spraying objects of small area. For the proposed technology, it is possible to use inexpensive compact multicopter with a carrying capacity of about two kilograms. A spray module of about one liter of working fluid was developed. The liquid pressure at the nozzle exit is created due to the energy of compressed air supplied from a special reservoir through a pneumatic reducing unit. The use of a spraying module allows to expand the range of machines for plant protection and improve the quality of their spraying in hard-to-reach areas, in fields of small area and of complex configuration, in conditions of increased soil moisture and lack of wheeltrack. The production of the proposed design does not require sophisticated equipment and tools. The use of the device is advisable in small farms.