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Information Journal Paper

Title

A New Design for Audio Frequency Track Circuits using Rail Resistance in Oscillator

Pages

  47-60

Abstract

 In the railway industry, Track circuits are of great significance to ensure Safe transportation and avoid crashes and accidents. These circuits majorly determine the existence of a train on sections of rail path called tracks using the conductivity properties of rail steel as a part of the circuit. In this paper, the problem of high implementation costs and blind spots for audio frequency Track circuits is considered and solved. As the novelty of this work, a new structure for frequency Track circuits is proposed leading to the elimination of all on-rail receivers and precise Train positioning. The Rail resistance is taken into account in the transmitter circuit to affect the amplitude of signals based on the traveled path. Moreover, a new topology is suggested to amend the audio frequency Track circuit in order to decrease costs and remove blind spots as well. Compared to other Track circuits, the proposed method has the advantage of lower costs, and train’s location approximation without the use of GPS (global positioning system). The proposed method works with signals with frequencies within 80 to 180 Hz and the maximum length of track sections is set to 900 meters to restrict rail’s resistance effects. Finally, in the simulation section, the efficiency of the proposed method is studied, and its capability is proved.

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