Algorithm and software tools for optimizing the preparation of routes on high-speed lines based on RFID technology

On railways of the Republic of Uzbekistan, on hauls "Dashtabad - Zarbdar" and "Dashtabad - Bayaut" on section Tashkent - Samarkand and Navoi - Bukhara - 1, on section Samarkand – Bukhara organized high-speed train traffic, where hauls with a SAB microprocessor system were modernized on basis of axle counting system, produced by "Promelectronica". For the preparation of routes when departing or receiving at station, especially on high-speed sections, preparation is carried out with a large investment of time, which, in turn, interrupts the technological work carried out at the station. Offered with microprocessor semi-automatic lock on the axle counts, apply for establish routes RFID points, because maintenance and economic component are minimal. Accordingly, after examining the points and deriving analytical equations, algorithms and software tools were proposed. Key words: high-speed line, high-speed traffic, train, station, stage, mixed traffic, microprocessor-based semi-automatic blocking

Determination of the optimal parameters of the control sensor at the crossing in the control mode

On railway sections where there are intersections with road transport, control systems for crossing signaling with auto barriers are arranged. To control the entrance of the train to this section, track circuits with insulating joints are used. Such circuits have a number of significant drawbacks, one of which is the coming off of insulating joints, as well as breakage of the track circuit, which give 45% of the failures of automation systems on the haul. In this article, a study was made of a crossing track circuit with a tone frequency for the control mode. For the study, mathematical expressions for determining the most unfavorable moment were derived, an algorithmic expression for the control mode coefficient was presented, which gives more accurate information about the presence of damage. As a result, a block diagram was developed and graphs were displayed on the simulation model showing the influence and determination of the control mode of operation of the jointless tone track circuit. In conclusion, the results of the study are summarized

Algorithm, mathematical models and analysis of axle counting systems

The article discusses one of the sensors that is widely used to determine the location of a train with an axle counting system, namely the axle counter, since various types of sensors, such as track circuits, eurobalises, etc., are widely used in railway automation at stages and stations. The study consists in identifying the failure of the railway car counting axle under the influence of disturbing factors, namely the influence of weather conditions, terrain, the influence of rail magnetization, which leads to a malfunction of the axle counting system. The research method was to determine the failure in the calculation of the axles of the train, when, for unknown reasons, false information was shown, it turned out that when switching from diesel traction to electric rail, it is a grounding circuit, and the electrochemical effect also manifests itself, which leads to the accumulation of electrical energy. The research method consists in determining these factors; for this, algorithmic expressions were developed and the principle of operation of the axle counter was investigated. As a result, it was found that with electric traction, rail magnetization and magnetization between rail tracks, an accumulator effect, occur. The influence of the disturbing factor is calculated and shown by the distance to the sensitive element of the control sensor, the magnitude of the electromagnetic field intensity modulus, which affects the operation of the axle count sensor. In conclusion, protection methods based on adaptive protection methods are proposed

MAIN CHARACTERISTICS OF NONCONTACT CONVERTERS OF LARGE CURRENTS WITH LONGITUDINALLY DISTRIBUTED PARAMETERS FOR CONTROL AND MONITORING SYSTEMS

The article shows that the necessity of breaking current circuits to temporarily switch on electric measuring instruments, the presence of large power losses on shunts, undesirability or impossibility under technological process conditions of breaking circuits, as well as safety requirements have caused noncontact conversion and measurement of large direct currents in circuits without breaking them in metallurgy, electrochemical industry, railway transport, melioration, irrigation and in general in agriculture. The results of the development of one of them are presented in the paper. Considered its static characteristic, the error of calculation, which does not exceed 3 percent, its degree of nonlinearity, and its average and current sensitivity, which throughout the range of current transformed practically remain constant in magnitude. The developed galvanomagnetic noncontact converter can be widely used in control and management systems in water supply, melioration, and irrigation, industry, railway transport, metallurgy, science, engineering, as well as for the verification of electric meters at the place of their installation for non-contact control of direct and alternating currents

Trends in Improving Sensors for Controlling the Condition of Track Sections

Various principles can be used to implement intelligent track circuits: voltage regulation of the power supply, compensation methods for switching on rail lines and track circuit devices, receiver sensitivity adjustment, comparison of two electrical parameters of one, two, or more track circuits, as well as a combination of these methods. At present, such improvement of track circuits is becoming relevant, which would make it possible to exclude from the circuits one of the most unreliable elements - an insulating joint, use a modern microprocessor element base in devices for monitoring the state of track sections, thus ensure their reliable operation. This will significantly reduce the costs of building and operating interval control systems and increase train traffic safety. These requirements are met by intelligent track circuits, which consider the current value of the insulation resistance, the rate of change of this resistance, and the longitudinal asymmetry

Algorithm and software tools for optimizing the preparation of routes on high-speed lines based on RFID technology

On railways of the Republic of Uzbekistan, on hauls "Dashtabad - Zarbdar" and "Dashtabad - Bayaut" on section Tashkent - Samarkand and Navoi - Bukhara - 1, on section Samarkand – Bukhara organized high-speed train traffic, where hauls with a SAB microprocessor system were modernized on basis of axle counting system, produced by "Promelectronica". For the preparation of routes when departing or receiving at station, especially on high-speed sections, preparation is carried out with a large investment of time, which, in turn, interrupts the technological work carried out at the station. Offered with microprocessor semi-automatic lock on the axle counts, apply for establish routes RFID points, because maintenance and economic component are minimal. Accordingly, after examining the points and deriving analytical equations, algorithms and software tools were proposed. Key words: high-speed line, high-speed traffic, train, station, stage, mixed traffic, microprocessor-based semi-automatic blocking

Algorithm, mathematical models and analysis of axle counting systems

The article discusses one of the sensors that is widely used to determine the location of a train with an axle counting system, namely the axle counter, since various types of sensors, such as track circuits, eurobalises, etc., are widely used in railway automation at stages and stations. The study consists in identifying the failure of the railway car counting axle under the influence of disturbing factors, namely the influence of weather conditions, terrain, the influence of rail magnetization, which leads to a malfunction of the axle counting system. The research method was to determine the failure in the calculation of the axles of the train, when, for unknown reasons, false information was shown, it turned out that when switching from diesel traction to electric rail, it is a grounding circuit, and the electrochemical effect also manifests itself, which leads to the accumulation of electrical energy. The research method consists in determining these factors; for this, algorithmic expressions were developed and the principle of operation of the axle counter was investigated. As a result, it was found that with electric traction, rail magnetization and magnetization between rail tracks, an accumulator effect, occur. The influence of the disturbing factor is calculated and shown by the distance to the sensitive element of the control sensor, the magnitude of the electromagnetic field intensity modulus, which affects the operation of the axle count sensor. In conclusion, protection methods based on adaptive protection methods are proposed

Analysis of the differences between Wi-Fi 6 and Wi-Fi 5

While Wi-Fi 5 is still sufficient for many organizations and businesses, it is important to consider and upgrade to Wi-Fi 6. This article discusses the main differences between Wi-Fi 5 and Wi-Fi 6. The goal is to identify key metrics transmission of information content of signals, a method for determining the best use of Wi-Fi signals for certain categories of use, an analysis and study of the influence of frequencies on the quality of transmitted information, and also analyzes the growth rate of an organization using these technologies. Using the Orthogonal Frequency Division Multiple Access connection principle, Wi-Fi 6 technology provides the main advantage of performing multiple receptions and transmissions at the same time. Multiple User Multiple Input Multiple Output technology allows routers to communicate with all devices at the same time, resulting in maximum packet exchange. Using the Basic Service Set (BSS) color scheme, we can see that Wi-Fi 6 is far ahead of previous technologies

Method for determining sensor parameters railway automatics

The article analyzes the operation of relative track circuits, which shows that they are able to provide reliable control of the state of the rail line in extreme climatic conditions. Reliable operation of relative track circuits can be carried out at very low values of insulation resistance, down to 0.1 Ohm km and below. The method of monitoring the state of the rail line, based on fixing the voltage of the receiving end before the train approaches and then determining the threshold values, significantly expands the range of changes in the insulation resistance, in which the normal operation of the track circuit is possible. The goal is to represent the track circuit, where the theory of the rail line is used according to the standard of the track circuit operating modes, at present many factors have not been taken into account for high-speed traffic, one of these is the transmission resistance with insulation resistance, the influence of disturbing and other factors. Mathematical modeling has been developed to determine the insulation resistance in various weather conditions

Four-Pole Rail Coefficients Of The Jointless Track Circuit In The Presence Of One Of The Ends Track Circuit Insulating Joints

The article describes the equivalent circuit of a jointless rail circuit with one throttle transformer and derives equations for the analysis and synthesis of rail circuits when powered on one side. A mathematical model and analytical expressions are developed taking into account the resistance of the rails and the resistance of the insulation. The coefficients of a rail four-poul with one throttle transformer supply voltage on the one hand. The calculated expressions of the four-terminal devices and the sensitivity criteria of the rail circuit when a single line breaks, as well as the minimum transmission resistance, are presented and derived