No. 8

Developing a drone route for monitoring crop yields

The article is devoted to a task of defining the optimal flight path of a drone for monitoring agricultural land and estimate its operating time to obtain images of objects of interest to the customer with a given percentage of overlap at a given flight altitude and determine the number of charging points and their location. The article discusses the graph formulation of the problem, presents discretization algorithms for the polygon under study, a polynomial algorithm for the shortest connection of the studied areas, and also considers the use of an algorithm previously developed by one of the authors, which takes into account restrictions on the choice of connecting points for the studied polygons. To implement and test the algorithms proposed in the article, a graphical shell was developed. It provides the opportunity to select equipment, the shooting area and calculate the drone’s flight path taking into account the selected equipment.

Keywords: routing, plane graph, algorithm, optimization, constraints, drone routing problem, precision farming.

Roadheader positioning using LiDAR sensors

This paper deals with the development of automatic positioning system of roadheader. Currently, there are no systems capable of determining the position of the roadheader in the tunnel. To realize the positioning system, a scheme using three LiDAR sensors was developed. An algorithm for obtaining data from the lidars, an algorithm for filtering the obtained data, an approximation algorithm and an algorithm for calculating the position of the combine body relative to the walls and ceiling of the tunnel were also developed. The result of the work is the developed scheme of LiDAR sensors location on the roadheader body and the algorithm for determining the roadheader position in the tunnel. The developed system will make it possible to compensate for displacements from the central axis of the tunnel during operation.

Keywords: positioning system, roadheader, LiDAR, positioning accuracy, drilling efficiency.

Data processing method and algorithm for vehicle counting and classification using deep convolutional neural network

This paper proposes a neural network model for detecting, classifying and counting vehicles on the street-road network using video surveillance camera data. The proposed model is based on YOLO v8 deep learning model and can be applied in predictive vehicle traffic monitoring systems to optimize logistic nodes of transportation networks. The developed model of vehicle recognition, classification and counting is tested on real data from traffic surveillance cameras of Dushanbe city, Republic of Tajikistan. The proposed model on real experimental data demonstrated the accuracy of up to 0,995.

Keywords: traffic flow monitoring, vehicle detection, vehicle tracking, vehicle counting, data fusion, deep neural networks.

Improving the accuracy of the direction finding of the radio source by choosing the optimal amplitude weight distribution of the antenna array as part of the radiocarbon landing system

The structure and composition of the radiocarbon landing system of an unmanned aerial vehicle (UAV) in the form of a multi-position landing radar complex is considered, which allows processing information on several spatially spaced sections of the field from a radio emission source (IRI), while joint processing of the received signal can significantly increase noise immunity and informativeness. The use of an adaptive phased array antenna (AFAR) radio direction finder as part of a radiocarbon UAV landing system is being investigated. The application of new optimal amplitude distributions on AFAR elements in the radio direction finder is investigated. The choice of amplitude distributions according to the criteria: the presence of zero and maximum in the AFAR directional pattern (DN), minimizing the maximum level of the side lobes of the total and difference DN with a minimum angular expansion of the main lobe of the total DN of the LFAR and the maximum steepness of the discriminatory characteristic of the monopulse bearing method allows to increase the accuracy of determining the angular coordinates of the IRI in the radiocarbon landing system.

Keywords: adaptive phased array antenna, total radiation pattern, differential radiation pattern, amplitude weight distribution, radio direction finder, radiocarbon landing system.

Mobile video surveillance kit on the drilling rig

The article describes a mobile video surveillance system on a drilling rig, which is designed to carry out technological control in high-risk areas at oil and gas producing enterprises. The advantages of this complex, circuit solutions and functional properties of the device are presented.

Keywords: complex, installation, video surveillance, drilling rig, advantages, properties, enterprises.

An active harmonic conditioner as an alternative to a corrector electronic start-up device in ultraviolet equipment. Problems of nonlinear loads

This article deals with nonlinear loads, in particular, their problems. An alternative to the corrector of the electronic start-up device (EPRA) in ultraviolet (UV) equipment is also being considered.

Keywords: ultraviolet, nonlinear loads, harmonics, electronic start-up device, ultraviolet equipment, active air conditioner.

Spectrophotometric studies of photositals at an experimental facility operating in the near ultraviolet region of the spectrum

The article highlights the problem of studying photositals in the near ultraviolet region of the spectrum with a developed spectrophotometric installation for detecting optical parameters. Spectral devices and complexes allow for quantitative and qualitative analysis of the composition of a substance, revealing information about the electronic and molecular structure of the media under study, which means that the study of photositals by a developed spectrophotometric installation operating in the near ultraviolet region of the spectrum is of interest, therefore the work is promising and relevant. The paper defines the purpose and sets the task, as well as presents the objects and method of research. The optical scheme of the experimental setup is given, as well as the appearance. The dependences of the transmission coefficient on the wavelength of radiation for the studied objects are obtained.

Keywords: spectrophotometer, photositals, transmission coefficient, optical parameters, radiation wavelength, silicon photodiodes.

Investigation of the Effectiveness of Information and Measurement Systems for Monitoring Technological Processes

Many industrial processes related to fuel combustion are characterized by high temperatures and concentrations of harmful substances in emissions into the atmosphere. The article deals with the issues of evaluating the effectiveness of information and measurement systems and systems for monitoring the condition and diagnostics of boiler installations (AIS MS). A method for evaluating the effectiveness of regulating the technological process of heat energy production based on the use of finite state machines and the penalty function is proposed.

Keywords: measuring system, metrological characteristics, measurement result, boiler plant, diagnostic feature.