Sehchan Oh

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Automatic train protection is a primary function of train control system which helps prevent collisions with speed restriction and applying brakes. Safety analysis and evaluation of automatic train protection with simulation is needed to improve the system usability in the business area. In the paper, we design automatic train protection simulator for(More)
In this paper, we propose a platform surveillance monitoring system using image processing technology for passenger safety in railway station. The proposed system monitors almost entire length of the track line in the platform by using multiple cameras, and determines in real-time whether a human or dangerous obstacle is in the preset monitoring area by(More)
Radio based train control system can perform the high density train control due to its real-time traceability of train location and the high amount of information transmission, and it has the merit to reduce costs for equipment invetment and maintenance costs because it does not use the existing track circuit. However, a separate system which can check the(More)
A train coupling/decoupling technology is essential not only for a usual operation for a formation building of the train, but also for an operation with variable formation according to the change in transportation demand within the same line and for an equalization of the allocation interval of the main and branch lines. However, there are problems of long(More)
Radio based train control system has the effect of increasing a track capacity since it enables the high density train control to be made due to its real-time traceability of train location and the high amount of information transmission, and it has the merit to reduce maintenance costs greatly because it does not use the track circuit. The technical core(More)
In this paper, we propose an enhanced Access Grid (eAG) system which enables distributed collaboration among heterogeneous systems with 3D media. There have been various kinds of studies addressing distributed collaboration systems. Most systems exploit 2D display or provide no communication among heterogeneous systems. Our proposed e-AG system has the(More)
The primary function of train control system prevents train collisions by keeping the safe interval with the preceding train. The train control system is consisted of wayside and onboard equipment. The wayside train control system generates control information necessary for train operation, and the onboard train control system controls operational(More)
In this paper, we propose approaches for connection the vision based monitoring system with railway signal for automatically train emergency stop. The vision based monitoring system detects possible accidents in railway platform area by using multiple cameras and sensors, and immediately reports the detection results with alarm message to the station and(More)