| Title |
A Study on Stabilization of Code Frequency Control Between Wayside and Onboard Signal System of AF Noninsulated Track Circuit |
| Authors |
박동훈(Dong-Hoon Park) ; 한호현(Ho-Hyun Han) ; 김선교(Seon-Kyo Kim) ; 강정원(Jeong-Won Kang) |
| DOI |
https://doi.org/10.5370/KIEE.2023.72.10.1250 |
| Keywords |
AF track circuit; speed code track circuit; signal system; train control system |
| Abstract |
While the train is starting and running, a specific code frequency is transmitted to control the operating speed of the corresponding section. After arriving at the station, the code frequency for controlling the door opening in the direction of getting on and off is changed and transmitted to the onboard signal system on the wayside. During the process of switching from the speed control frequency to the access control frequency, passenger safety accidents often occur due to the malfunction, resulting in the opening of the doors on the opposite side. In this paper, the causes of frequency instability during the process of switching door opening direction control frequency from the operating speed frequency were analyzed, and an alternative was proposed. First, the carrier frequency form of the rate code control method is analyzed. Second, the principle of transmitting frequency information from the wayside signal system to the onboard signal system is confirmed, and the process of switching from train operation speed control to door open control is analyzed. Third, research on improving the reliability of the speed code track circuit system is conducted by analyzing the possibility of malfunction of train door direction control such as resonant circuit characteristic changes, frequency strength, frequency noise, and appropriate processing time for onboard signal system frequency |