Most of the electric motors used in industry are squirrel cage induction motors. In modern industries, various types of starting and controlling asynchronous motors are used, the choice of the starting mode determines the necessary means of automating the electric drive, which directly affects the functionality and, accordingly, the final cost of the project. Direct starting is the most common way to start an electric motor. The main advantage of direct start is the maximum cheapness of the control scheme implementation. The disadvantage of direct starting is high starting currents, exceeding the rated ones by 3-8 times, which leads to increased wear of the windings and causes a reduction in the service life of the electric motor. A high initial starting torque is accompanied by a significant impulse, which places a significant load on both the mechanisms of the electric drive itself and the units of technological equipment. Star-delta starting is used to reduce inrush currents. It allows you to make a soft start with a star circuit, and during operation, a triangle is turned on, providing the maximum power of the unit. In contrast to the starting modes discussed earlier, the soft starter stabilizes the starting characteristics, providing a gradual increase in power and stable operation of the motor, which allows to extend the service life of the electric motor and technological equipment. The use of frequency converters allows you to optimize production, reduce energy consumption, and increase the service life of equipment. The inverter also protects the electric motor in the event of a short circuit, deviations from the nominal mains voltage and controls the operating temperature of the electric motor, preventing it from overheating. Having considered the features, as well as the advantages and disadvantages of starting modes of asynchronous electric motors, it is possible to determine what equipment is needed to implement a specific task of an automated electric drive.

Keywords: automated electric drive, asynchronous electric motor, starting mode, soft starter, frequency converter, automatic control

The article discusses the concept of a system for automatic identification and traceability of pipe production at the stage of hot rolling. The main stages of pipe production are presented. A table of selection of technological parameters has been compiled. The structure of the database for the system of automatic identification and traceability of pipe products has been developed.

Keywords: raceability, automatic identification, pipe production, hot rolled products, quality management system

Monitoring the condition of indoor objects is an important task of building management systems. To solve the problems of monitoring optimal use of wireless sensors. The purpose of the article is to consider wireless passive sensors that do not require a separate power source. A generalized block diagram of a system for monitoring the condition of objects inside the premises is presented. Two types of sensor data are given: on the basis of radio private identification and on the basis of surface acoustic waves. Their principle of action is revealed and the areas of application in smart home control systems are shown. It is revealed that modern technologies allow solving the problem of providing power to wireless sensors using an external electromagnetic signal.

Keywords: wireless passive sensor, RFID tag, temperature measurement, sensor based on surface acoustic waves

The work is devoted to the review of application of wireless technologies for measurement of parameters of technological processes. Two types of wireless network architectures are considered: "star" and "cellular". It is proposed to take as a basis the topology "cellular scheme". Three wireless standards are given: ZigBee, Wi-Fi and Bluetooth. The advantage of ZigBee technology is shown. RFID technology is considered as the basis of the wireless sensor. Features of construction of system with its application are considered. The block diagram of the control system is given. Classification of RFID-tags is given. Examples of such sensors are given.

Keywords: wireless technologies, cellular circuit, RFID tags, wireless sensors, automation of technological processes

The article reviews considers the current state of automated process control systems. The main disadvantages of these systems are identified: the lack of full integration of process control systems into a single enterprise system, the lack of a single system of monitoring and diagnostics of equipment, local data storage. The principles of development of automation of the chemical industry in the conditions of digital production, such as end-to-end modeling, implementation of a unified data collection system based on the technology of industrial Internet of things, the introduction of cloud technologies to store the accumulated database and knowledge. This strategy of automation development allows to increase the competitiveness of the chemical industry.

Keywords: production automation, digital production, end-to-end modeling, industrial Internet of things, production management integration.

The work is devoted to modeling the dependence of the temperature of the extrusion process in the melting zone on the composition of the feedstock and the rotational speed of the screw shaft. The quality of the finished product can not be determined in real time, but it depends on the values ​​of the technological parameters of the production process. Therefore, the quality of products can be controlled through the control of technological parameters. Therefore, the problem of determining the temperature dependence is an important problem. The model is obtained on the basis of experimental data from a number of alternative models. As parameters, the rotational speed of the screw shaft was used. As a criterion for the quality of the model, the sum of the theoretical model errors from the experimental data is used. As the speed of the screw shaft increases, the temperature of the extrusion process increases with a gradually decreasing rate. The resulting model of the extrusion process can be used in automatic extrusion control systems to control the quality of finished products.

Keywords: extrusion model, screw extruder, screw speed, extrusion, finished product quality