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The Influence of Frequency on Wayside Transmitter of ATP System upon Reinforcing Bars in Concrete Slab Track  

Kim, Min-Seok (서울산업대학교 철도전문대학원, 철도전기신호공학과)
Yoon, In-Mo (호남대학교 광산캠퍼스, 정보통신대학)
Ko, Jun-Seog (한국철도시설공단, KR연구소)
Lee, Jong-Woo (서울산업대학교 철도전문대학원, 철도전기신호학과)
Publication Information
Journal of the Korean Society for Railway / v.11, no.6, 2008 , pp. 536-542 More about this Journal
Abstract
In concrete slab track, the signal current using wayside transmitter of ATP (Automatic Train Protection) system is influenced by reinforcing bars. The magnetic coupling between reinforcing bars and wayside transmitter of ATP system as a filter makes an input current distorted. So, it makes an alternating current signal with a desirable size not transmit to on-board system of a train. Way to decrease the distortion of an input current signal frequency is to avoid maximum induction current frequency. And the induction phenomenon between reinforcing bars insulated and wayside transmitter of ATP system does not occur. In this paper, we represent the model about wayside transmitter of ATP system and reinforcing bars on the concrete slab tracks, and calculated the parameters demanded for the model. Also, we demonstrated it through the Maxwell program. Furthermore, we calculated impedance on wayside transmitter used in KVB system and ERTMS/ETCS system which are a kind of ATP system, frequency response of induction current, using Matlab, and demonstrated the validity of it, using PSpice program.
Keywords
Concrete slab track; ATP frequency; induction current; impedance;
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