| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground-vehicle information transmission device capable of detecting the train position with high accuracy on the on-board side without providing any transponder or wayside coil on a traveling path of a train. SOLUTION: Loop antennas 1T-4T are arranged with a spacing therebetween along a train traveling path 5. The adjacent loop antennas, for example, the loop antennas 1T, 2T transmit ATC signals S11, S12 set to the carrier frequencies different from each other. An onboard device 3 decodes the carrier frequency of the ATC signal received from the loop antenna, determines that a self train TR is located on a boundary between the loop antennas when the carrier frequency of the ATC signal is changed. COPYRIGHT: (C)2008,JPO&INPIT
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