A Study on the Electrical Characteristics of Track Circuits

궤도회로의 전기적 특성에 관한 연구

Track circuit decides whether the section is occupied by train or free using the electrical characteristics of the rail, and sends information to the train using the rail as the medium of communication. So the electrical parameters of the rail are important to the track circuits. But they are influenced by the frequency of the transmitted signal and the environments like rain, snow and location of the rail. In this paper, the parameters of the rail is practically measured using the measurement method based on the 2-port network. The measurement demonstrates that the parameters of the rail is dependent on the frequency of the signal flowing on the rail and the environments like wheather. So this analysis of the parameters helps the design of track circuits.