| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve resonance frequency detection accuracy by preventing erroneous detection of the resonance frequency of a ground coil without using a feedback oscillation circuit. <P>SOLUTION: The on-vehicle train control apparatus includes a signal creation unit 12, a pickup coil 11 and a signal detection unit 13. The signal creation unit 12 creates a frequency sweeping signal by sweeping a frequency in an allowable variation range including the resonance frequency of a resonator in a specific time cycle. The pickup coil 11 has a first coil 11a that receives the frequency sweeping signal, and a second coil 11b that obtains the signal by the electromagnetic connection with the first coil, and obtains the signal component corresponding to the resonance frequency of the resonator out of the frequency sweeping signals received by the first coil 11a with the second coil 11b via the ground coil 15, when the pickup coil is electromagnetically connected with the ground coil 15. In the signal detection unit 13, the signal obtained by the second coil 11b of the pickup coil 11 is subjected to Fourier transform in a time cycle equal to the specific time cycle, and the detection treatment of the ground coil 15 is performed on the basis of the signal after the Fourier transform. <P>COPYRIGHT: (C)2012,JPO&INPIT |
