scholarly journals The justification of the levels of electromagnetic influence of traction current on track circuits

2017 ◽  
Vol 0 (14) ◽  
Author(s):  
V. Havryliuk ◽  
V. Meleshko
Keyword(s):  
Traction Current ◽  
Track Circuits

scholarly journals Elektromagnetiese modelle vir elektriese spoorbaanstelsels

1997 ◽  
Vol 16 (2) ◽  
pp. 86-95
Author(s):  
B. M. Steyn ◽  
J. D. Van Wyk
Keyword(s):  
Performance Analysis ◽  
Transmission Line ◽  
Current Distribution ◽  
Electromagnetic Interference ◽  
Railway Track ◽  
Traction Current ◽  
Different Types ◽  
Track Circuits ◽  
Track Circuit ◽  
Electromagnetic Models

The use of electromagnetic models is very expedient when railway track circuits are designed or when their operation is being studied. These electromagnetic models include models for performance analysis of the different types of track circuits as well as models used to study the effect of electromagnetic interference. Before these models can produce useful results they all require accurate input parameters. These parameters include the transmission line parameters of the track and the traction current distribution along the length of the track. Models that have been developed for these parameters are presented in this paper, together with an overview of the available track circuit models.

The methodology of calculation of the level of traction current harmonics in the jointless track circuits

2016 ◽  
pp. 41-46 ◽  
Author(s):  
Anton Anatolyevich Antonov ◽  
◽  
Mikhail Evgenyevich Bakin ◽  
Keyword(s):  
Current Harmonics ◽  
Traction Current ◽  
Track Circuits

scholarly journals Reducing noise influence on an audio frequency track circuit

2019 ◽  
Vol 294 ◽  
pp. 03015
Author(s):  
Inna Saiapina ◽  
Mykhailo Babaiev ◽  
Olha Аnanіevа
Keyword(s):  
Electromagnetic Interference ◽  
Pulse Generator ◽  
Signal To Noise Ratio ◽  
Single Pulse ◽  
Audio Frequency ◽  
Railway Transport ◽  
Traction Current ◽  
Useful Signal ◽  
Track Circuits ◽  
Track Circuit

In connection with electromagnetic interference influence on the track circuits, the purpose of the research is finding the means to increase the noise immunity of an audio frequency track circuit. The authors propose a new engineering solution, which enables reducing the effect of noises on the input of the track receiver in the intervals between signal current pulses. The proposed noise-immune audio frequency track circuit is based on inserting a delay line, an adjustable single-pulse generator and a controlled electronic switch into the existing audio frequency track circuit equipment. To analyze its efficiency, the operation of the audio frequency track circuit was simulated under conditions of traction current disturbances, impulse and fluctuation interferences with the known parameters. The results show that proposed device for railway transport allows to increase a signal-to-noise ratio on the track receiver input from 8% to 30%, depending on the interference parameters and the level of the useful signal.

Study on FSK Signal Demodulation Based on Chirp-Z Transform

2012 ◽  
Vol 532-533 ◽  
pp. 827-831
Author(s):  
Jiang Hua Xia ◽  
Jing Guo ◽  
Xiao Ming Wang
Keyword(s):  
Frequency Shift ◽  
Matlab Simulation ◽  
A Algorithm ◽  
Signal Parameters ◽  
Detailed Explanation ◽  
Symbol Rate ◽  
Shift Keying ◽  
Signal Demodulation ◽  
Track Circuits ◽  
Strong Ability

The Frequency-Shift Keying (FSK) signal is frequently used in track circuits because of the strong ability of resistance interference. Symbol rate is one of the important signal parameters for safety of railway. The paper propose a algorithm of high precise detectation of FSK signal using Chirp-Z transform; Theoretically gives the detailed explanation to the major technique, and has carried on the Matlab simulation, The simulation result indicates this method during the enhancement is shifted signal examination precision, reduced the computation order of complexity.

Study on centre-fed boundless track circuits

2005 ◽  
Vol 152 (5) ◽  
pp. 1049 ◽  
Author(s):  
N. Nikolov ◽  
N. Nedelchev
Keyword(s):  
Track Circuits
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