| 摘要 |
PROBLEM TO BE SOLVED: To provide an automatic train control device capable of transmitting relatively much train control information by setting a frame length of transmitted code information so short as to take a time capable of receiving one frame at a minimum on a vehicle by considering the passing time of a train in a short and small track circuit, by setting only minimum required information as an information content, and by keeping the information of an outside track circuit as information other than that. SOLUTION: In a ground device 1, when a track circuit length is determined by a track circuit length determination part 1a, a frame length of 1/2 or less of a time for the train to pass the short and small track circuit is set in the control information of the short and small track circuit, and a short and small kind track circuit control signal having set the short and small track circuit control information is transmitted to a rail 2 by a transmission control part 1d. In an on-vehicle device 4, when the short and small track circuit control signal carried to the rail 2 from the ground device 1 is received by a receiving antenna, and it is confirmed that all frames set in the short and small track circuit control signal has properly received, the short and small track circuit control information set in the short frame is deciphered by decoding it.
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