| 摘要 |
<p>PURPOSE:To detect that a change signal is received in the boundary of signal sections by the fact that the received signals of two receivers installed on vehicles spaced at a predetermined distance with respect to the direction of moving train vary at a predetermined time difference. CONSTITUTION:Two current receivers 1, 2 are provided on the lower surface of a train R at a predetermied distance with respect to the direction of the moving vehicle, and connected through receivers 3, 4 to memory circuits 6, 7 of a signal discriminator 5. In the discriminator 5, the stored contents of the memory circuits 6, 7 are produced to a logic product circuit 10 under the conditions of the variation in the output of the receiver 4, and the time difference from the variation in the output of the receiver 3 to the variation in the output of the receiver 4 measured by a time measuring circuit 8 is compared with a predetermined time, and the result is outputted to a logic product circuit 11. The output of the circuit 11 is applied as the change reception signal to a train control device.</p> |
