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  • On the temperature control of the drying chamber of the apparatus for the impregnation of fabrics of periodic action

    The article is devoted to the issues of accounting for various production disturbances that affect the temperature field in the drying chamber. The nature and nature of disturbances affecting the change in chamber temperature are taken into account using statistical methods for processing temperature curves over time. The temperature field in the plane of sensor installation was considered.In practice, the electrical model of the temperature field of the drying chamber can be represented as a three-dimensional grid, and the nature of the temperature field can be judged from the distribution of potentials at the corresponding grid nodes. By changing the grid parameters, it is possible to determine the appropriate temperature regimes for different materials and types of impregnations.

    Keywords: temperature, statistical methods, drying chamber, autocorrelation function, spectral density, amplitude-phase characteristic

  • To the question of contour recognition

    The article discusses the method of recognizing contours in the primary image. An algorithm has been developed for finding the absolute minimum of functionality in an image.

    Keywords: contour, algorithm, defect, recognition, cut, reference frame, minimum search

  • Crossarm reliability control system at nuclear power facilities by ultrasonic flaw detection

    This article discusses the problem of ensuring the control of the state and strength of the device for handling radioactive materials at nuclear power facilities and proposes the development of a remote ultrasonic control system for continuous-periodic monitoring of the state of critical structural elements of the service traverse operating in a radiation hazardous environment. The basic principles of processing the results of ultrasonic flaw detection and obtaining characteristics are given.

    Keywords: ultrasonic testing, piezoelectric transducer, defect, strength, monitoring

  • Development of an automated control system for the process of extruding the polymer coating of pipes

    This work is devoted to the development of a control system for the technological process of extruding a polymer coating of pipes. In the process of work, the existing system for regulating the temperature of the polyethylene extruder zones was analyzed, and the scientific and technical literature was analyzed. The description of the technological process of extruding the outer polymer coating of a steel pipe is given, the selection of automation equipment is carried out. The main difference between a proportional controller over a proportional-integral-derivative controller was described, the optimal tuning coefficients of the PID controller were also determined using experimental methods, graphical transients were given, and the most appropriate method for controlling the temperature of the zones of worm machines was selected, due to which increasing the homogeneity and uniformity of the protective polymer layer.

    Keywords: pipe polymer coating extrusion, PID controller, polyethylene, adhesive

  • Recognition of Freight Container Marking Digits Using the Faster-RCNN Algorithm

    This article describes training a neural network to recognize the digits of a freight container number. Due to the lack of a dataset containing a cargo container, training was performed on the Street View House Numbers dataset. Before training the model, the dataset was analyzed and histograms were built that reflect general information about the dataset. The neural network was trained in the Python programming language using the Tensorflow library. The obtained results of assessing the accuracy of the model operation allowed us to conclude that it is possible to use a data set and a neural network to solve the problem of recognizing the numbers of a freight container.

    Keywords: machine learning, digit recognition, cargo container, neural network, image classification

  • Optimization of the operating parameters of the direct-acting heat exchanger

    The work is devoted to ensuring the completeness of mixing of gas coolants into a direct-acting heat exchanger by optimizing the geometry of the mixing chamber, in particular the addition of a funnel. Four funnel configurations in the range of 45°-180° are considered. The problem is solved in a stationary formulation by numerical simulation in the OpenFOAM environment. A 14-fold increase in the uniformity of mixing is shown when using a 45° funnel compared to a cylindrical mixing chamber.

    Keywords: heat exchanger, mixing heat exchanger, efficiency improvement, outgoing flue gas, numerical modeling, heat recovery

  • Universal power supply with digital system for monitoring the parameters of the galvanic environment

    This paper describes the results of modeling thermal processes and air flows occurring in a universal power source (UPS) with a digital control system for output parameters under given operating conditions. The UIP is intended for scientific research in the field of electrochemical copper deposition in order to form through and via holes in printed circuit boards, three-dimensional microassemblies, metallization of epoxy resins, and organic materials. The article discusses the features of the development of a universal power source, presents the key results of the design and study of the thermodynamic characteristics of a prototype sample.

    Keywords: universal power supply, microcontroller, computer aided design, printed circuit board, efficiency factor, computational fluid dynamics, mechanical computer aided design, electrical computer aided design, design rule checking, finite element method

  • Approach to the design of technical means of technological processes

    The paper presents a study of the problems of organizing the process of designing technical means that are involved in the technological process of production by enterprises. Under the technical means it is proposed to understand both software, hardware, and software and hardware solutions. The main problem is identified - the discrepancy between the functionality of technical means and the technological process. In this regard, a study is being made of the processes of linking the technological process of output of enterprises with the processes of designing and developing technical means. From the results of the study, it was determined that the models of the functional of technical means are constructed by developers, and not by actors. Such models are formally presented not as a description of the procedures for performing the functions of a technological process by actors, but as a model of how the functions of future technical means will be used by actors. The necessity is substantiated and a hypothesis is put forward about the possibility of solving the indicated problem.

    Keywords: technological process, actor, developer, functions of the technological process, procedures for performing functions, a model for the formation of a need for a technical means, a model for the use of technical means

  • The use of a geothermal energy installation for heating private houses in order to develop green energy

    The article is devoted to the use of renewable energy sources, namely geothermal energy for home heating. Methods of installation, advantages and disadvantages of geothermal heating are investigated. A comparative analysis of the cost of 1 MJ of heat received from various energy sources was carried out, and the efficiency of using heat pumps for heating buildings was proved. It was noted that in connection with the global problem of greenhouse gas emissions, this decision is relevant and paramount for achieving hydrocarbon neutrality. The introduction of geothermal heating methods can be a huge step towards green energy.

    Keywords: system, temperature, geothermal heating, heat pump, compressor, evaporator, condenser, carbon footprint, ecology, green energy

  • Influence of direction of gas swirler channels on plasma flow parameters

    The article solves the problem of determining the influence of the use of gas swirlers with various options for combining the direction of the channels on the velocity and temperature of the plasma flow. A comparative analysis of the use of gas swirlers with channels that are directed in one direction and in the opposite direction is carried out. The problem was solved by conducting a computer experiment by the finite element method using the SolidWorks software package. The results of the calculation experiment were verified by conducting a full-scale experiment using an experimental plasma installation, which is used to obtain powder, apply coatings and modify product surfaces, taking into account its design features. Recommendations for the conduct of these processes are proposed. The results are of practical use for developers and consumers of process equipment. In the case of using gas swirlers in which the channels are directed in one direction, the temperature and velocity of the plasma flow are higher than in the case in which the channels are directed in opposite directions. For the coating process, it is recommended to use the option of orienting the channels of gas swirlers in one direction, since the highest values of the velocity and temperature of the plasma flow are achieved, which favorably affect the properties of the applied coatings. For the production process of powders, it is recommended to use the option of orienting the channels of gas swirlers directed in opposite directions, since a lower plasma flow velocity is important for this process, which has a positive effect on reducing the dimensions of the installation and spheroidization of powder particles. For the surface modification process, the results of the study can be used to determine the rational position of the treated surface.

    Keywords: mathematical model, plasma flow, temperature, speed, gas swirler, plasma method, powder production, coating, surface modification

  • Application of microprocessors for automation of diagnostics and technical condition control of tunneling machines

    The method of automated diagnostics and control of the technical condition of the electric drive of mining machines, which consists in monitoring the current with subsequent spectral analysis of the received signal, is considered. It allows using the ATmega16 microcontroller to determine with sufficient accuracy the current technical state of the electric drive elements. The aim of the work is to prove the possibility and justify the effectiveness of the use of microprocessor technology in the mining industry to automate the diagnosis of machinery units. The adequacy of the developed methodology for determining the identification frequencies is confirmed by experimental data in the low-frequency region of the spectrum. The conclusion of this article is that a comparative analysis of the calculated and experimentally obtained amplitude-frequency characteristics of individual components of the drive motor and elements of the transmission of the executing body of the KP21 tunnelling machine has confirmed their adequacy.

    Keywords: electric drive of a tunneling machine, automated diagnostics and control, current monitoring, spectral analysis, increased reliability of tunneling equipment

  • Improving the efficiency of automatic identification of oil spills using unmanned aerial vehicles

    Due to the intensive development of digital technologies, significant progress is be-ing observe in the creation of automated systems and technologies. One of the most pressing problems at the present stage of industrial development is the presence of cases of oil spills caused because of technological accidents and accidents. With advanced achievements in the field of digital technologies, it seems possible to au-tomate the process of identifying oil spills. The main purpose of the current article is to analyze the possibility of using unmanned aerial vehicles to perform automatic identification of oil spills. The author investigates this issue, and presents an option to increase the use of these systems based on the development of a special image-processing algorithm based on exponential accumulation and the variance method. The results of the work confirm the hypothesis of the effective use of unmanned aerial vehicles for automatic identification of oil spills.

    Keywords: automation, unmanned aerial vehicle, oil spill, identification, image processing

  • Methods for determining the characteristics of multicomponent coatings of stop valves

    The service life of shut-off valves operated at sites of hazardous production facilities with ultra-high parameters of the working environment is largely limited by the wear resistance of contact surfaces. In this regard, to increase the durability of contact surfaces, technological methods are used to modify the surface and special functional coatings are used. The development and selection of new functional coatings are inextricably linked with their comparative study based on the determination of the most significant characteristics through testing. The purpose of this work is an analytical review of the most common test methods for evaluating the characteristics of multicomponent nanocomposite coatings applied to the contact surfaces of valves to increase their wear resistance. Based on the results of the analytical review, recommendations are given for testing multicomponent nanocomposite coatings.

    Keywords: pipeline fittings, functional coatings, test methods, service life, wear, friction, hardness, corrosion, tribology

  • System for predicting electricity consumption in food production based on streaming data

    The purpose of this work is to implement a system for predicting electricity consumption in food production and to select the most appropriate method for training the forecasting model. In this work, a system was implemented for predicting electricity consumption based on streaming data, which receives them in "real time". The system is implemented on the principle of microservice architecture, where the following were implemented: a service for collecting data from meters, a service for data aggregation and forecasting services. Two forecasting services were implemented: using the classical learning approach based on the ARIMA model and the online learning approach using the HATR online model, the results of which were compared using tests for predicting anomalous values and forecasting under conditions of a change in the data concept, or drift concepts.

    Keywords: machine learning, online learning, online model, concept drift, data drift

  • Markov model of relaxation and aging processes fibrous materials

    The concept of a fibrous material (hereinafter referred to as FM) as a soft structure formed by fiber elements surrounded by air and areas of fiber interaction on touch surfaces is proposed and substantiated. The fiber elements are in a deformed state. The deformation of the fibers is reversible, elastic-elastic. In the areas of interaction between the fibers, the forces of adhesion and dry friction act. The deformation of the fibers leads to the preservation of residual internal energy in the material. At low loads, the FM can change its state reversibly. At high loads, the structure of the interaction sites irreversibly changes. The processes of aging and degradation of FM are gradual irrevocable transitions from one group of states to others. The dynamics of these processes is statistical in nature. Therefore, a Markov model of state change has been developed in the form of several subsets of irrevocable subsets and one ergodic subset of states. At the qualitative level, the possibility of using the proposed model to describe the dynamics of FM aging processes and estimate the duration of this process, taking into account its probabilistic and statistical nature, is shown.

    Keywords: fibrous material, aging, soft structure, elasto-elastic deformation, irreversible process, markov model, statistical dynamics

  • Modeling and improvement of combined systems for regulating the weight of the paper web

    To solve the problem with a large time delay in combined control systems, it is proposed to introduce an additional control circuit for the speed of paper pulp intake. The introduced circuit will function alternately with the current pressure control circuit inside the pressure device.

    Keywords: Paper-making machine, pressure device, paper mass intake, paper web weight, computer modeling, regulator.

  • Overview of the specific functions of the FBD language on the example of programmable relays LOGO!

    The article reveals the problem, that arises as a result of generalized training of specialists according to the International Electrotechnical Commission standard 61131-3. The standard regulates the languages in which software is developed for programmable logic controllers. Training according to the standard allows a specialist to work with any controllers developed by any manufacturers, the downside of which is an insufficiently in-depth studying of the additional potentials of controllers, that are typical for the models of the particular manufacturer. Further, we consider a number of specific special functions of the FBD language using the example of programmable relays LOGO! by Siemens, which are not typical for the other devices, that work in this language, then we observe the examples of using these functions in various technological processes. Also, we get to know the abilities to transfer the parameters betweenparts of the program by using so-called link and the features of the implementationof pulse-width modulation in LOGO! controllers.And finally,we comprehend methods of working with analog signals including analog calculations and the option of non-standard using of the minimum/maximum search function as a storage element.A lot of developers ignore similar functions, because they are not covered in the training courses. Using of special functions simplifies the development of programs and provides additional capabilities for the programmer.Therefore, the necessity of a deeper studying of the capabilities of a certain controller seems to be apparent.

    Keywords: programmable logic controllers, functional block diagrams, specialist training, analog signal processing, rarely used functions

  • Computer training complexes for training operators of loading and unloading machines in the skills of performing technological operations

    The article presents the results of the development of research in the field of automated training of operators of technological processes (on the example of loading and unloading machines) on computer training complexes (CTC). A feature of the developed CTCs is an intelligent automated system (AS) for monitoring the formation of sensorimotor skills, based on mathematical models and algorithms for representing knowledge about the technological process, automated design of training courses for professional training of operators in a virtual production environment, and automatic assessment of the formation of skills. The use of CTC for training operators of loading and unloading machines based on an intelligent AS helps to improve the quality of the formation of professional skills for the effective and safe implementation of technological processes in various fields (for example, river and sea ports, construction, mining) based on the results of training courses.

    Keywords: loading and unloading machines, technological process, computer training complex, professional skills, sensorimotor skills, intelligent automated systems

  • Integration of various resource planning and lifecycle management systems (OVERVIEW)

    The review is devoted to the integration of PLM systems into the 1C:ERP system. The article presents definitions of PLM and ERP systems. The analysis of the data presented in modern sources proves the effectiveness of the integration of systems for the exchange of design and technological data about the product and normative reference information with the production management system. Overview of the implementation of PLM and ERP systems in enterprises. Description of integration errors and possible solutions. The evaluation of the analyzed results from the standpoint of the efficiency of production process management confirms the feasibility of using integrated systems at the enterprise.

    Keywords: enterprise resource planning, product lifecycle management, enterprise management, integration, product lifecycle

  • Some aspects of improving the efficiency of port activities based on neural video analytics

    The main task in the development and integration of digital automation tools is to increase the efficiency of the enterprise. One of the most relevant areas of integra-tion of such solutions is port activity. The purpose of the current article is to ana-lyze the issues of improving the efficiency of port activities based on intelligent au-tomation tools. The author considers in more detail the solution of the presented problem based on the integration of neural video analytics solutions. The paper us-es theoretical research methods, as well as the results of foreign and domestic scien-tific research. The scientific significance of the work lies in the attempt to systema-tize knowledge about methods of increasing the efficiency of port activities based on intelligent automation tools.

    Keywords: port activity, automation, neural video analytics, enterprise, artificial intelligence

  • Automation of the pedestrian crossing control system using a motion sensor

    The article presents a study of accidents on the roads involving children and persons under the age of majority. An analysis was made of the legal norms for the protection of the rights of the child on the roadway. In addition, an additional means of reducing accidents on the roads, as well as its location relative to the pedestrian, was identified.

    Keywords: accident, traffic accident, child, children, incident, road, section, pedestrian

  • Mathematical modeling of an automated control system for the technological process of leading of long sleeves

    This work is devoted to the research and development of an automated control system for the technological process of leading of long sleeves. Long sleeves are an important and promising direction for the development of industrial and metallurgical industries. Now there is a wide variety of designs and sizes of sleeves. However, there are four main methods of their manufacture: mandrel, half-mandrel, without mandrel and on flexible mandrels. The article presents an analysis of the advantages and disadvantages of each of them. Mastering and improving the technology of manufacturing sleeves on flexible mandrels is the main way to increase the volume and speed of sleeve production. The results of mathematical modeling of the automated system are presented. The simulation was performed using the ViSim software tool. The control object is a lead melting bath. The temperature of lead is accepted as an adjustable technological parameter. The method of passive experiment was used to build an automated control system.

    Keywords: automated control system, technological process, long sleeve, lead, temperature, mathematical modeling, control object, transfer function, control parameters

  • Analysis of the capacitive converter of the device for automatic control of the degree of mixing of natural and chemical fibers

    The article presents the results of the calculation and analysis of the distribution of field strength in the area of the measuring ring of the capacitive transducer for various geometric dimensions of the electrodes. Also, the appropriate distance between the electrodes and their size in the primary converter system were determined to assess the quality of mixing natural and chemical fibers at the output of tape equipment.

    Keywords: fiber mixing quality, electromagnetic field, capacitive estimation method, conformal transformations

  • Emulation of polyvinyl chloride drying process in Omegaland medium

    The article describes the development of a virtual emulator of the polyvinyl chloride drying process. The development of the emulator is implemented using the Omegaland development environment. The characteristics and functional structure of the polyvinyl chloride drying process in a fluidized bed dryer are presented. Mathematical models of elements of simulated system are considered, algorithm of their operation is characterized. The steps of developing a virtual polyvinyl chloride drying simulator are described. The flowchart is assembled in the OmegaLand Visual Modeler modeling environment. The fluidized bed dryer module was developed in the integrated development environment of Microsoft Visual Studio in the C++ programming language. The developed dryer model was integrated into the Omegaland library. The developed dryer model was tested in the emulation mode of the polyvinyl chloride drying process.

    Keywords: mathematical model, drying, polyvinyl chloride, Omegaland, emulator, virtual simulator, fluidized bed dryer

  • Development of a software training simulator to simulate the operation of a district heating system

    The results of the development of a software package are presented that allow training personnel to work in a district heating system to ensure a reliable process of energy transportation in heat networks. The developed simulator described in the article is a software package that includes a SCADA system and a Termas client for modeling and simulation operation of the district heating system. The simulator consists of a thermal-hydraulic mathematical model of the operating modes of the heating network, software and information support for setting up the operating modes of the simulator and assessing the actions of the personnel by the instructor based on the results of work on the simulator. The requirements for the functionality of the simulator are presented. The Demand Analysis application was used to collect data on energy consumption and outdoor temperature. The process of operation of the simulator in the simulation and modeling mode for the heat networks of the city of Yekaterinburg is presented. The developed software simulator makes it possible to simulate an accident, train personnel in the skills of safe equipment control in complex non-stationary modes. The software package allows you to reduce energy costs.

    Keywords: training simulator, software, district heating, heating networks, SCADA system, Termis platform, model, temperature, accident