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

Havaei, Pedram; Sandidzadeh, Mohammad Ali

doi:10.22068/ijrare.312

Volume 9, Issue 2 (12-2022) IJRARE 2022, 9(2): 47-60 | Back to browse issues page

‎ 10.22068/ijrare.312

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Havaei P, Sandidzadeh M A. A New Design for Audio Frequency Track Circuits using Rail Resistance in Oscillator. IJRARE 2022; 9 (2) :47-60
URL: http://ijrare.iust.ac.ir/article-1-312-en.html

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

Pedram Havaei

, Mohammad Ali Sandidzadeh

Department of Control Engineering and Signaling, School of Railway Engineering, Iran University of Science and Technology

Abstract: (484 Views)

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.

Keywords: Track circuit, Safe transportation, Audio frequency track circuits, Rail resistance, Train positioning

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Type of Study: Research | Subject: Electrical railway