Theoretical studies of the movement of grain moth eggs infected with the trichogram dosing and scattering device of an unmanned aerial vehicle

Annotation Purpose. Determination of the influence of parameters and modes of operation of the dosing and scattering device on the speed characteristics of the movement of grain moth eggs infected with trichogramma. Methods. Theoretical studies of the process of particle motion of the test material by the dosing and scattering device were performed using the basic laws of classical theoretical mechanics. Results. On the basis of the analysis of means for settlement of a trichogram the design of the dosing and scattering device of the unmanned aerial vehicle (UAV) for settlement of a trichogram is defined. According to the results of theoretical studies, it was concluded that in order to achieve high velocity characteristics of the trichogram movement, the length of the diffuser-deflector deflector, the radius of curvature of the deflector and the angle of the deflector sector must have parameters at which the trichogram will be minimally reduced. The material from which the dosing and dispensing device is made must have the lowest possible coefficient of friction. Conclusions 1. According to the results of theoretical research it is established that with increasing: the curvature of the deflector arc from 0.03 m to 0.09 m and the angle of the deflector sector 0° to 90°, the speed of the trichogram varies from 5 m/s to 3.5 m/s. 2. To increase the width of the capture when performing the technological operation of settling the trichogram, the angle of the deflector sector should be in the range of 45–90°. 3. When changing the coefficient of friction from 0.2 to 0.9, the velocity of the particle decreases from 4.61 m/s to 3.5 m/s. With an increase in the coefficient of friction in 2 times the speed decreases by 8%. Keywords: theory of material particle motion, dosing and scattering device, unmanned aerial vehicle, biological plant protection, trichogram settlement, settlement norm, capture width.

Download Full-text

PRACTICAL ASPECTS OF USE OF THE UNMANNED AERIAL VEHICLE AGRAS T16

ENGINEERING, ENERGY, TRANSPORT AIC ◽

10.37128/2520-6168-2021-2-16 ◽

2021 ◽

pp. 152-167

Author(s):

Oleksandr Kholodiuk

Keyword(s):

Unmanned Aerial Vehicles ◽

Unmanned Aerial Vehicle ◽

Vegetation Index ◽

Plant Protection ◽

Cognitive Activity ◽

Theoretical Research ◽

Flight Planning ◽

Aerial Vehicles ◽

Aerial Vehicle ◽

Effective Use

Scientific and technological progress today allows the widespread use of modern technologies in agriculture in the planning and use of agricultural technologies. Such technologies are the use of unmanned aerial vehicles as well. Now they allow to collect information about the field, make an orthophoto of the field, monitor crops and its condition at different stages of plant development, perform cartography, monitor the normalized vegetation index, spray plant protection products to control pests and diseases or make a trichogram. The object of research in this article is the process of preparation, adjustment, planning of flight missions and the use of unmanned aerial vehicle AgrasT16 for spraying work sites. The aim of the research is the effective use of the Agras T16 drone from DJI by substantiating the main measures for the timeliness and correctness of its preparation for work, setting the specified operating parameters, planning missions and calculating its productivity. The objectives of the work: to analyze the existing research on the use of unmanned aerial vehicles in Ukraine for agricultural purposes; to establish design features of the drone; to find out the basic settings and flight planning; to establish the productivity of the drone on spraying and to substantiate measures and ways of its effective use. The methods of research include the method of cognitive activity and methods of analysis and synthesis of both information from official sources and information from the works of other researchers. The scientific work deals with the different design and technical features of the Agras T16 hexacopter from the previous generation models. The practical aspects of its use in spraying, preparation for work, adjustment, selection of the necessary mode of operation, planning of fields and flight missions by means of the remote control and work with the charging station have been substantiated. The main features of different modes of its operation Manual Operation, Manual Plus, A-B Route Operation, Route Operation, which will allow you to solve various tasks have been highlighted. Particular attention has been paid to the methods of field flight planning (routes) of the drone, setting up the spray system, calibration of the compass and nozzles. According to the results of theoretical research, the productivity of the drone per hour of variable time has been established, which amounted to 8.8 ha/h. The measures to reduce unproductive time spent when spraying Agras T16 work areas have been substantiated.

Download Full-text

Theoretical studies of the process of distribution of biomaterial on the surface of the field

Mehanization and electrification of agricultural ◽

10.37204/0131-2189-2019-10-5 ◽

2019 ◽

pp. 55-65

Author(s):

S. Maranda

Keyword(s):

Unmanned Aerial Vehicle ◽

Theoretical Calculations ◽

Experimental Studies ◽

Correct Selection ◽

Test Material ◽

Theoretical Studies ◽

Material Distribution ◽

Flight Altitude ◽

Aerial Vehicle

Purpose. Improving the quality of resettlement through Trichogramma the establishment of rational modes of operation of the dosing and seeding device (DVP) of an unmanned aerial vehicle (UAV). Methods. Theoretical studies of the motion of a particle of the test material. Experimental studies using the method of planning a three-factor experiment, methods of statistical data processing. Results. On the basis of the analysis of trichogram resettlement means, the design of the dosing and seeding device of the unmanned aerial vehicle for trichogram resettlement was determined. As a result of the theoretical studies, the trajectory of motion of the particle of the test biomaterial was determined, which makes it possible to set the working width of the capture. According to the results of experimental studies, the quality of material distribution does not change significantly with increasing flight altitude. However, factors such as plant height and obstacles in the field must be taken into account, so flight altitudes of at least 5 m should be respected. Due to the air flow from the quadcopter propellers, the grip width is significantly reduced. Therefore, for qualitative distribution of biomaterial on the surface of the field, the distance between adjacent passages should be 6 m. Conclusions 1.According to the results of theoretical calculations and experimental studies it is established that the flight altitude of an unmanned aerial vehicle during trichogram settlement should not be less than 5 m from the surface of the plant. 2.The qualitative estimation of material distribution on the surface of the field depends on the flight speed, which should be within 3–5 m/s. 3.The uniformity of distribution of biomaterials is greatly enhanced by the correct selection of the working width of the grip, which should be about 6 m. Keywords: dosing sowing device, ejector, unmanned aerial vehicle, biological protection of plants, reshaping of trichograms, norm of settlement, width of capture.

Download Full-text

Morphological Characteristics and Physical & Mechanical Properties of seeds of small-seeded crops

National Interagency Scientific and Technical Collection of Works. Design, Production and Exploitation of Agricultural Machines ◽

10.32515/2414-3820.2020.50.27-35 ◽

2020 ◽

pp. 27-35

Author(s):

Elchyn Aliiev ◽

◽

Christina Lupko ◽

Keyword(s):

Mechanical Properties ◽

Coefficient Of Friction ◽

Morphological Characteristics ◽

Physical And Mechanical Properties ◽

Specific Weight ◽

Test Material ◽

Effective Diameter ◽

Morphological Parameters ◽

Separation Processes ◽

The Coefficient Of Friction

To create a database and systematize the seeds of samples of small-seeded crops, it is necessary to determine the patterns of influence of morphological parameters on their physical and mechanical properties. The development of the latest technologies and technical devices for cleaning and separation is possible due to the understanding of the characteristic morphological parameters for each of the small-seeded crops. The aim of the research is to determine the physical and mechanical properties of the seed material of small-seeded crops (mustard, flax, ryegrass, rapeseed), necessary to increase the efficiency of their cleaning and separation processes. To achieve this goal, a plan of experimental research was developed, which provided for the determination of physical and mechanical parameters of seeds of small-seeded crops, namely: indicators that characterize the flowability of seeds (angle of natural bias); frictional properties of seeds (static coefficient of friction); porosity (density) and density; size and mass characteristics of seeds (length, width, thickness, effective diameter, weight of 1000 seeds). It is established that the physical and mechanical properties of seeds of small-seeded crops are greatly influenced by its humidity. With increasing humidity, the performance of the test material increases. This is due to the fact that with increasing humidity, the shape of the seed almost turns into a spherical, which, in turn, leads to an increase in the curvature of the surface and reduce the points of contact between the seeds. As a result, the angle of natural inclination increases. The coefficient of friction of seeds of small-seeded crops depends on the roughness of the friction surface and decreases with increasing humidity. This is due to the fact that with increasing humidity decreases the forces of molecular attraction of the seed coat to the surface of the material. Seed density increases with increasing humidity. From this we can conclude that the absorption of moisture by the investigated material increases the total weight of the seed, and as a result - increases its specific weight.

Download Full-text