scholarly journals Experimental inspection of the dosing-sowing device by unmanned aerial vehicle for the resettlement of trichogrammes

2019 ◽  
pp. 61-71
Author(s):  
Maranda, S.
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Statistical Data ◽  
Experimental Studies ◽  
Material Distribution ◽  
Flight Altitude ◽  
Operating Modes ◽  
Aerial Vehicle ◽  
Biological Protection ◽  
The Right

Purpose. Improving the quality of the trichograms' resettlement by establishing rational operating modes of the dosing and sowing device of an unmanned aerial vehicle. Methods. Experimental studies using the method of planning a three-factor experiment, methods of statistical data processing. Results. Based on the analysis of the technical means for resettlement of the trichograms, the design of the dosing-sowing device of a unmanned aerial vehicle for the resettlement of the trichogram was substantiated. As a result of the experimental studies, it was established that during the deployment of a trichogram with a dosing-seeding device, a stable leakage of the material due to ejection was ensured by using diaphragms with a diameter of 2.5 mm or more. According to the results of the research it was established that with the increase in flight altitude, the quality of material distribution does not change significantly. But factors such as the height of the plants and the presence of obstacles on the field must be taken into account, so it is necessary to keep the flight altitude not less than 5 m. Due to changing the size of the confuser, the range of flight of the particle did not change, which leads to the conclusion to use a smaller cone of diameter due to which reduces the frontal resistance. When using a dosing-seeding device for resettlement of a trichogram on a quadracycle, due to air flow from propellers, the width of the capture significantly decreases. Therefore, for the qualitative distribution of biomaterials on the surface of the field, the distance between adjacent passages should be 6 m. Conclusions 1. The height of the flight of an unmanned aerial vehicle during the resettlement of the trichogram must not be less 5 m from the upper edge of the plant. 2. The uniform distribution of material on the surface of the field depends on the flight speed, which should be within the range of 3–5 m/s. 3. The quality of the material distribution increases from the right choice of the width of the ceiling, which should be about 6 m. Conclusions: dosing sowing device, ejector, unmanned aerial vehicle, biological protection of plants, reshaping of trichograms, norm of settlement, width of capture.

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

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.

scholarly journals Active stabilization of unmanned aerial vehicle imaging platform

2020 ◽  
Vol 26 (19-20) ◽  
pp. 1791-1803 ◽  
Author(s):  
Mohit Verma ◽  
Vicente Lafarga ◽  
Mael Baron ◽  
Christophe Collette
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Vibration Isolation ◽  
Isolation System ◽  
Aerial Vehicles ◽  
Active Stabilization ◽  
Aerial Vehicle ◽  
Active Vibration ◽  
Improved Performance

The advancement in technology has seen a rapid increase in the use of unmanned aerial vehicles for various applications. These unmanned aerial vehicles are often equipped with the imaging platform like a camera. During the unmanned aerial vehicle flight, the camera is subjected to vibrations which hamper the quality of the captured images/videos. The high-frequency vibrations from the unmanned aerial vehicle are transmitted to the camera. Conventionally, passive rubber mounts are used to isolate the camera from the drone vibrations. The passive mounts are able to provide reduction in response near the resonance. However, this comes at the cost of amplification of response at the higher frequency. This article proposes an active vibration isolation system which exhibits improved performance at the higher frequencies than the conventional system. The active isolation system consists of a contact-less voice coil actuator supported by four springs. Experiments are carried out to study the effect of vibrations on the quality of images captured. The characterization of drone vibrations is also carried out by recording the acceleration during different flight modes. The performance of the proposed isolation system is experimentally validated on a real drone camera subjected to the recorded drone acceleration spectrum. The isolation system is found to perform better than the conventional rubber mounts and is able to reduce the vibrations to a factor of one-fourth. It can be effectively used to improve the image acquisition quality of the unmanned aerial vehicles.

scholarly journals The results of studies of eccentric tillage roller

2019 ◽  
Vol 126 ◽  
pp. 00010
Author(s):  
Ivan Sharonov ◽  
Vladimir Kurdyumov ◽  
Viktor Kurushin
Keyword(s):  
Experimental Studies ◽  
Soil Treatment ◽  
Dynamic Force ◽  
Theoretical Studies ◽  
Soil Density ◽  
Operating Modes ◽  
Factors Influencing ◽  
The Relationship ◽  
Required Quality

Developed by eccentric tillage rink, which ensures the desired quality of the soil and increase the yield of crops. As a result of theoretical studies, an expression for determining the dynamic force that increases the intensity of crumbling soil lumps, depending on the regime parameters of the rink. In addition, the relationship between the power required when driving the rink, its parameters. The factors influencing the process of tillage by the developed roller are determined. As a criterion of optimization, the adopted coefficient of compliance with for the density soil of benchmark, which characterizes the quality of soil rolling from the position of compliance of soil density with agrotechnical requirements. As a result of experimental studies, the parameters and operating modes of the roller are optimized, at which the required quality of soil treatment is achieved.

scholarly journals Evaluating the Correlation between Thermal Signatures of UAV Video Stream versus Photomosaic for Urban Rooftop Solar Panels

2021 ◽  
Vol 13 (23) ◽  
pp. 4770
Author(s):  
Young-Seok Hwang ◽  
Stephan Schlüter ◽  
Jung-Joo Lee ◽  
Jung-Sup Um
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Thermal Imaging ◽  
Video Stream ◽  
Strongly Correlated ◽  
Flight Altitude ◽  
Solar Panels ◽  
High Rise ◽  
Ground Target ◽  
Aerial Vehicle ◽  
Rooftop Solar

The unmanned aerial vehicle (UAV) autopilot flight to survey urban rooftop solar panels needs a certain flight altitude at a level that can avoid obstacles such as high-rise buildings, street trees, telegraph poles, etc. For this reason, the autopilot-based thermal imaging has severe data redundancy—namely, that non-solar panel area occupies more than 99% of ground target, causing a serious lack of the thermal markers on solar panels. This study aims to explore the correlations between the thermal signatures of urban rooftop solar panels obtained from a UAV video stream and autopilot-based photomosaic. The thermal signatures of video imaging are strongly correlated (0.89–0.99) to those of autopilot-based photomosaics. Furthermore, the differences in the thermal signatures of solar panels between the video and photomosaic are aligned in the range of noise equivalent differential temperature with a 95% confidence level. The results of this study could serve as a valuable reference for employing video stream-based thermal imaging to urban rooftop solar panels.

scholarly journals Utilization of Unmanned Aerial Vehicle, Artificial Intelligence, and Remote Measurement Technology for Bridge Inspections

2020 ◽  
Vol 32 (6) ◽  
pp. 1244-1258
Author(s):  
Pang-jo Chun ◽  
Ji Dang ◽  
Shunsuke Hamasaki ◽  
Ryosuke Yajima ◽  
Toshihiro Kameda ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Unmanned Aerial Vehicle ◽  
Measurement Technology ◽  
Remote Measurement ◽  
Bridge Inspection ◽  
Current State ◽  
Bridge Collapse ◽  
Bridge Inspections ◽  
Aerial Vehicle

In recent years, aging of bridges has become a growing concern, and the danger of bridge collapse is increasing. To appropriately maintain bridges, it is necessary to perform inspections to accurately understand their current state. Until now, bridge inspections have involved a visual inspection in which inspection personnel come close to the bridges to perform inspection and hammering tests to investigate abnormal noises by hammering the bridges with an inspection hammer. Meanwhile, as there are a large number of bridges (for example, 730,000 bridges in Japan), and many of these are constructed at elevated spots; the issue is that the visual inspections are laborious and require huge cost. Another issue is the wide disparity in the quality of visual inspections due to the experience, knowledge, and competence of inspectors. Accordingly, the authors are trying to resolve or ameliorate these issues using unmanned aerial vehicle (UAV) technology, artificial intelligence (AI) technology, and telecommunications technology. This is discussed first in this paper. Next, the authors discuss the future prospects of bridge inspection using robot technology such as a 3-D model of bridges. The goal of this paper is to show the areas in which deployment of the UAV, robots, telecommunications, and AI is beneficial and the requirements of these technologies.

scholarly journals Optimization of Parameters and Operating Modes of Disc Sowing Device According to Seeding Uniformity Criterion

2018 ◽  
Vol 28 (3) ◽  
pp. 379-388
Author(s):  
Vladimir A. Ovchinnikov ◽  
Mikhail N. Chatkin ◽  
Alena V. Ovchinnikova
Keyword(s):  
Experimental Studies ◽  
Operating Conditions ◽  
Design Parameters ◽  
Optimal Parameters ◽  
Plant Growth And Development ◽  
Important Condition ◽  
Operating Modes ◽  
Favorable Conditions ◽  
Uniformity Criterion

Introduction. When cultivating agricultural crops, it is necessary to take into account the plants’ need for moisture, nutrients, location by area of nutrition, determining illumination, etc. Taking into account the biological characteristics of crops, various methods of sowing are used to create favorable conditions for plant growth and development. An important condition for sowing is the uniform arrangement of seeds along the sulcus, especially in the cultivation of testes of small-seeded cultures. A key role in the uniformity of seeding is provided by the design parameters and kinematic operating conditions of the sowing device. Materials and Methods. To determine the optimal parameters and operating modes of the disk sowing device, methods of factor experiment and multi-criteria optimization were used. Results. Mathematical models of the technological process of sowing seeds were obtained based of experimental studies. Conclusions. To ensure the improvement of the seeding quality of small seeds, the design parameters of the experimental seeder: х4 – is the diameter of the cell; х5 – the number of cells on the disk, will tend to the maximum values. The optimum circumferential speed of the sowing disk should be in the range from 0.127 to 0.192 m/s, and the speed of the machine’s movement is no more than 2 m/s.

scholarly journals FUZZY C-MEANS ALGORITHM FOR SEGMENTATION OF AERIAL PHOTOGRAPHY DATA OBTAINED USING UNMANNED AERIAL VEHICLE

2015 ◽  
Vol XL-5/W6 ◽  
pp. 113-115 ◽  
Author(s):  
M. V. Akinin ◽  
N. V. Akinina ◽  
A. Y. Klochkov ◽  
M. B. Nikiforov ◽  
A. V. Sokolova
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Aerial Photography ◽  
Experimental Studies ◽  
Two Dimensional ◽  
Fuzzy C Means ◽  
Aerial Vehicles ◽  
Short Period ◽  
Aerial Vehicle ◽  
Fuzzy C Means Algorithm

The report reviewed the algorithm fuzzy c-means, performs image segmentation, give an estimate of the quality of his work on the criterion of Xie-Beni, contain the results of experimental studies of the algorithm in the context of solving the problem of drawing up detailed two-dimensional maps with the use of unmanned aerial vehicles. According to the results of the experiment concluded that the possibility of applying the algorithm in problems of decoding images obtained as a result of aerial photography. The considered algorithm can significantly break the original image into a plurality of segments (clusters) in a relatively short period of time, which is achieved by modification of the original k-means algorithm to work in a fuzzy task.

scholarly journals New process for fluffing rotted straw

2020 ◽  
Vol 1 (6) ◽  
pp. 91-100
Author(s):  
A.N. Zintsov ◽  
◽  
V.N. Sokolov ◽  
Keyword(s):  
Structural Parameters ◽  
Experimental Studies ◽  
Practical Experience ◽  
High Productivity ◽  
Operating Modes ◽  
New Process ◽  
Bad Weather ◽  
Flax Straw ◽  
State Agricultural Academy

The results of scientific research and practical experience of flax-growing farms have shown that the process of dew preparation of trusts occurs unevenly along the thickness of the stem layer. With prolonged bad weather, flax stalks sprout with grass and are nailed to the soil by rains. In this state, the lower stems in the layer rot and the quality of fibrous products is markedly reduced. Therefore, it is necessary to periodically wrap or fluff the tapes of the stems. Currently, on the country's farms, flax growers prefer fluffing flax-straw belts due to the high productivity and reliable operation of machines in the field. However, existing fluffers confuse the stems and increase their elongation. The authors note that the resulting large disorientation and excessive elongation of the stems in the layer are the main reasons for the low yield of long fiber in the flax mill. Taking into account the indicated problem, the scientists of Kostroma State Agricultural Academy proposed a fundamental-ly new process of fluffing rotted straw and developed a machine for its implementation. The ma-chine ensures the maximum preservation of the initial values of the structural parameters of the stem layer. The article describes the device and the principle of operation of the new two-line fluffer for flax-straw belts, describes the methodology for substantiating its operating modes and the re sults of experimental studies. At the same time, it was found that when the prototype of the fluffer is operating on flax-growing belts sprouted by grass and nailed by rain, it is necessary to set the pick-up drum in such a position in which its fingers will penetrate into the soil to a depth of at least 1.0 ... 2.0 cm. The possibility of increasing the forward speed of the unit movement to 3.1 m / s and more without a noticeable decrease in the quality of its operation was also revealed.

scholarly journals Identification of a simplified mathematical model of an unmanned aerial vehicle

2020 ◽  
pp. 26-33
Author(s):  
A. A. Lobaty ◽  
Y. F. Yatsyna ◽  
S. S. Prohorovith ◽  
Y. A. Hvitko
Keyword(s):  
Mathematical Model ◽  
Transfer Function ◽  
Unmanned Aerial Vehicle ◽  
Center Of Mass ◽  
Experimental Studies ◽  
Vertical Plane ◽  
Parametric Identification ◽  
Ease Of Use ◽  
Aerial Vehicle ◽  
Discrete Values

The problem of determining the shape and parameters of a mathematical model in the form of a transfer function for the movement of an unmanned aerial vehicle (UAV) in the vertical plane of space is solved. The angle of deviation of the Elevator is considered as the input signal, and the pitch angle of the UAV is considered as the output signal. We use the results of experimental studies of UAV flight, which are considered as known values of input and output signals under specified flight conditions. The measured discrete values of the experimental results are approximated by a fourth-order polynomial based on regression analysis for ease of use in identification. The analytical substantiation of the need to apply the methods of linearization of the mathematical model of UAV movement and the accepted assumptions for obtaining differential equations of UAV movement relative to the center of mass, allowing to synthesize the required transfer function of the corresponding element of the UAV control system. The results of computer modeling confirmed the validity of the synthesized mathematical model obtained on the basis of structural and parametric identification. This approach can be used to obtain simplified mathematical models that are used to solve problems of synthesis and optimization of control systems not only for UAVS, but also for other dynamic objects.

Evaluation of disturbance effect on geese caused by an approaching unmanned aerial vehicle

2019 ◽  
Vol 30 (2) ◽  
pp. 169-175 ◽  
Author(s):  
MADS BECH-HANSEN ◽  
RUNE M. KALLEHAUGE ◽  
JANNIK M. S. LAURITZEN ◽  
MATHIAS H. SØRENSEN ◽  
BJARKE LAUBEK ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Unmanned Aerial Vehicle ◽  
Initial Disturbance ◽  
Flight Altitude ◽  
Aerial Vehicles ◽  
Disturbance Effects ◽  
Vigilance Behaviour ◽  
Aerial Vehicle

SummaryUnmanned aerial vehicles (UAVs) are useful tools in ornithological studies. Importantly, though, UAV-caused disturbance has been noted to vary among species. This study evaluated guidelines for UAVs as a tool for researching geese. Twenty-four flocks of foraging geese were approached at an altitude of 50–100 m with a quadcopter UAV and disturbance effects were analysed across different horizontal distances between the UAV and the flocks. Geese were increasingly disturbed when approached by a UAV, with birds showing increased vigilance behaviour within approximately 300 m. Increasing UAV flight altitude as well as increasing take-off distance from the flocks both decreased the risk of bird flocks flushing. In conclusion, when monitoring geese using UAVs, flight altitudes of 100 m and take-off distances of ideally ∼500 m are recommended, to minimise initial disturbance and reducing the risk of birds flushing.

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