scholarly journals TESTING NEW TYPES OF ROLLING STOCK FOR ELECTROMAGNETIC COMPATIBILITY WITH SIGNALING AND COMMUNICATION DEVICES

2015 ◽  
Vol 0 (5(59)) ◽  
pp. 7-15 ◽  
Author(s):  
V. I. Havrilyuk ◽  
V. I. Shcheka ◽  
V. V. Meleshko
Keyword(s):  
Electromagnetic Compatibility ◽  
Rolling Stock ◽  
Communication Devices

scholarly journals Critical Review of EMC Standards for the Measurement of Radiated Electromagnetic Emissions from Transit Line and Rolling Stock

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 759
Author(s):  
Andrea Mariscotti
Keyword(s):  
Time Distribution ◽  
Communication Systems ◽  
Electromagnetic Compatibility ◽  
Transportation Systems ◽  
Operating Conditions ◽  
Rolling Stock ◽  
Intrinsic Variability ◽  
Statistical Characterization ◽  
Electromagnetic Emissions

Accurate and comprehensive methods for the assessment of radiated electromagnetic emissions in modern electric transportation systems are a necessity. The characteristics and susceptibility of modern victim signaling and communication radio services, operating within and outside the right-of-way, require an update of the measurement methods integrating or replacing the swept frequency technique with time domain approaches. Applicable standards are the EN 50121 (equivalent to the IEC 62236) and Urban Mass Transport Association (UMTA) with additional specifications from project contracts. This work discusses the standardized methods and settings, and the representative operating conditions, highlighting areas where improvements are possible and opportune (statistical characterization of measurement results, identification and distinction of emissions and line resonances, and narrowband and broadband phenomena). In particular for the Electromagnetic Compatibility (EMC) assessment with new Digital Communication Systems, the characterization of time distribution of spectral properties is discussed, e.g., by means of Amplitude Probability Distribution and including time distribution information. The problem of determination of site and setup uncertainty and repeatability is also discussed, observing on one hand the lack of clear indications in standards and, on the other hand, the non-ideality and intrinsic variability of measurement conditions (e.g., rolling stock operating conditions, synchronization issues, and electric arc intermittence).

Bluetooth Devices Effect on Radiated EMS of Vehicle Wiring

2008 ◽  
pp. 681-694
Author(s):  
Miguel A. Ruiz ◽  
Felipe Espinosa ◽  
David Sanguino ◽  
AbdelBaset Awawdeh
Keyword(s):  
Energy Source ◽  
Wireless Communication ◽  
Laboratory Tests ◽  
Electromagnetic Compatibility ◽  
Physical Structure ◽  
Electronic Systems ◽  
Rf Transmitters ◽  
Communication Devices ◽  
Susceptibility Tests ◽  
Wire System

The electromagnetic energy source used by wireless communication devices in a vehicle can cause electromagnetic compatibility problems with the electrical and electronic equipment on board. This work is focused on the radiated susceptibility (electromagnetic susceptibility [EMS]) issue and proposes a method for quantifying the electromagnetic influence of wireless radio frequency (RF) transmitters on board vehicles. The key to the analysis is the evaluation of the relation between the electrical field emitted by a typical Bluetooth device operating close to the automobile’s electrical and electronic systems and the field level specified by the electromagnetic compatibility (EMC) directive 2004/104/EC for radiated susceptibility tests. The chapter includes the model of a closed circuit structure emulating an automobile electric wire system and the simulation of its behaviour under electromagnetic fields’ action. According to this a physical structure is designed and implemented, which is used for laboratory tests. Finally, simulated and experimental results are compared and the conclusions obtained are discussed.

scholarly journals Electromagnetic Safety of Remote Communication Devices—Videoconference

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 323
Author(s):  
Artur Przybysz ◽  
Krystian Grzesiak ◽  
Ireneusz Kubiak
Keyword(s):  
Communication Systems ◽  
Electromagnetic Compatibility ◽  
Security And Privacy ◽  
Data Confidentiality ◽  
Remote Communication ◽  
Radio Receivers ◽  
Video Signals ◽  
Related Data ◽  
Communication Devices ◽  
Audio Data

Devices powered by electricity become sources of electromagnetic emissions in the course of their operation. In the case of devices oriented to process information, these emissions can have a character of revealing emissions, i.e., those whose reception and analysis allow for remote reconstruction of related data. The best known example of this phenomenon is the formation of revealing emissions during the operation of imaging devices: monitors, projectors or printers. Increasingly more often, these components are used for communication in the form of videoconferences with other network users. The article presents the result of tests and analyses of threats related to the use of such solutions (monitors, personal computers, VoIP terminals) for the confidentiality of conversations and the data presented during them. The focus is on video signals; however, the potential possibilities of revealing speech signals were also indicated. Such phenomenon causes a huge threat to data confidentiality because the combination of graphics and sound can undoubtedly contain much more information about the protected data than just graphics or sound separately. The presented results of analyses apply to graphic data, possibilities of non-invasive acquisition of such data, similarity of images and of patterns and reconstructed image and image recognition. The results indicate that there is still a risk of loss of data confidentiality due to a phenomenon of an electromagnetic leakage, and specialized instrumentation is not required for its interception under favorable circumstances. This may particularly apply to audio data that may be accidentally received by home radio receivers. In particular, the presented results of analyses apply to a Special Issue of Symmetry which is characterized by security and privacy in communication systems and networks, signal processing, video and image processing, multimedia communications and electromagnetic compatibility. All these scientific and technical areas have either symmetrical or asymmetrical approaches, and they have to be taken into consideration as a whole in order to choose the best combinations to protect processed information.

scholarly journals Research on measurement of electromagnetic fields generated by electric and combustion powered rolling stock.

2019 ◽  
Vol 294 ◽  
pp. 03016
Author(s):  
Dominik Adamski ◽  
Krzysztof Ortel ◽  
Juliusz Furman
Keyword(s):  
Electromagnetic Compatibility ◽  
Technical Specification ◽  
Test Methods ◽  
Rolling Stock ◽  
Network Resources ◽  
Testing Procedures ◽  
Detection Systems ◽  
Potential Source ◽  
Interference Test ◽  
Wheel Sensor

Axle counters are more and more often applied in train detection systems. The wheel sensor is a main part of each axle counter system. In parallel, more and more complex railway vehicles, especially traction ones, are a potential source of interferences influencing the operation of these train detection systems. It is the reason to verify the electromagnetic compatibility (EMC) between the signalling equipment, particularly train detection systems and new vehicles in the process of obtaining the permission for their exploitation. The measurement of interfering magnetic fields generated by vehicles is one of tests to be carried out. For the simplification and unification purpose of the applied interference test methods the EN 50238 standard and TS 50238-3 technical specification were developed. The specification defines unified testing procedures. However, it is necessary to verify if it may replace different testing methods used in particular European states. It is the goal of the European research project financed from the TEN-T network resources.

scholarly journals ELECTROMAGNETIC COMPATIBILITY OF RES ON RAILWAY

2020 ◽  
pp. 7-22
Author(s):  
Popov V ◽  
Shevchenko A
Keyword(s):  
Communication Networks ◽  
Mobile Communication ◽  
Electromagnetic Interference ◽  
Electromagnetic Compatibility ◽  
Rolling Stock ◽  
Radio System ◽  
Mobile Communication Networks ◽  
High Level ◽  
Cellular Mobile ◽  
Cellular Mobile Communication

This work reviews the main related problems of electromagnetic compatibility (EMC) of the locomotive radio system GSM-R in modern railway transport. The typical internal electromagnetic interference (EMI), caused by the high density of the equipment layout in the rolling stock, and external electromagnetic interference generated by public cellular mobile communication networks and other radio systems are considered. The results of experiments to determine the parameters of public cellular mobile communication networks along the selected railway section show a rather high level of signals that are EMI for GSM-R and affecting on EMC.

scholarly journals Impact of rail impedance intrinsic variability on railway system operation, EMC and safety

2021 ◽  
Vol 11 (1) ◽  
pp. 17
Author(s):  
Andrea Mariscotti
Keyword(s):  
Electromagnetic Compatibility ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Transportation Systems ◽  
Rolling Stock ◽  
Interface Element ◽  
Induced Voltage ◽  
Intrinsic Variability ◽  
Electrical Parameters ◽  
Experimental Values

Running rails in electrified transportation systems are the interface element for several phenomena related to system performance, electromagnetic compatibility and safety: useful voltage at rolling stock, short circuit current, induced voltage, stray current, and track circuit operation. This work presents the physical and mathematical groundings of rail electrical parameters (dc and ac resistance, ac internal and external inductance) and experimental results available in the literature, discussing variability and reliability for each interface. The results consist thus of the identification of the relevant rails longitudinal electrical parameters, the presentation of a set of reliable experimental values, and the discussion of the best approach to manage their variability and uncertainty.

scholarly journals LTE FDD AND SRD EQUIPMENT COMPATIBILITY IN 2500 MHZ BAND / LTE FDD IR SRD ĮRENGINIŲ SUDERINAMUMAS 2500 MHZ RUOŽE

2014 ◽  
Vol 6 (2) ◽  
pp. 206-210
Author(s):  
Evaldas Stankevičius
Keyword(s):  
Frequency Band ◽  
Short Range ◽  
Electromagnetic Compatibility ◽  
Base Stations ◽  
Software Systems ◽  
Frequency Channel ◽  
Channel Distribution ◽  
Mobile Stations ◽  
Communication Devices ◽  
Downlink Channels

This paper examines the LTE mobile communication base stations possible interfering effects on short range communication devices operating in ISM frequency band. LTE network is running in 2500–2690 MHz frequency band, where frequency channel distribution is used. Downlink channels are assigned to base stations and formed in 2620–2680 MHz band, uplink channels are assigned to mobile stations and formed in 2500–2560 MHz band. Short range communication devices operate in 2400–2483.5 MHz frequency range. The main problem of this study – the interference probability and magnitude. Real equipment was simulated using two different modelling software systems for investigation of electromagnetic compatibility: ICS Telecom and Seamcat. The modelling results show that LTE BS have minimum or no impact on operation of short range communication devices in ISM frequency band. Nagrinėjamas LTE mobiliojo ryšio bazinių stočių galimas interferencinis poveikis nedidelio veikimo nuotolio įrenginiams. LTE tinklas veikia 2500–2690 MHz dažnių ruože, naudojamas dažninis kanalų dalijimas. Žemynkrypčiai kanalai, priskiriami bazinėms stotims, formuojami 2620–2680 MHz ruože, aukštynkrypčiai kanalai, priskiriami mobiliosioms stotims, formuojami 2500–2560 MHz ruože. Trumpojo veikimo nuotolio įrenginiai veikia 2400–2483,5 MHz dažnių ruože. Pagrindinė šio tyrimo problema – galima interferencija ir jos mastas. Realus įrenginių veikimas modeliuojamas dviejomis skirtingomis programomis, kurios skirtos elektromagnetiniam suderinamumui tirti: ICS Telecom ir Seamcat.

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