| 摘要 |
<p>PURPOSE:To improve the reliability in the spot-system train control by using a memory circuit consisting of semiconductor element memorizing the speed information. CONSTITUTION:In case the frequency of A-signal is memorized in the memory circuit 9, the frequency of A-signal of the memory circuit 9 is put out through a band pass filter 3b, rectifying circuit 6b and an inferiority preferential circuit 8. When an element 1 on the train approaches an element on the ground to be changed over from the self-excited oscillation to the oscillation of the frequency B, the relay 7 is restored. Thereby the contact MR1 is completely closed to clear the memory circuit 9 and to open the contact MR2. Next, the memory circuit 9 memorizes the frequency of B-signals given through the OR circuit 11 and the timing gate circuit 10. When the element 1 on the train returns to the self-excited oscillation, the relay 7 again operates to put out the frequency of B-signal of the memory circuit 9 through the band pass filter 3c and the inferiority preferential circuit 8.</p> |
