| 摘要 |
PURPOSE:To install a ground equipment easily and also at a low cost, by placing a receiving antenna and a transmission antenna as a ground equipment in each block section, and also providing a transmitter and a receiver on an unattended inductive car. CONSTITUTION:When an unattened inductive car enters a block section 2b, a blocking signal generated by a transmitter is supplied to a receiving antenna 13b. The antenna 13b receives this blocking signal and supplies it to a transmission antenna 16a through a transmission line 15a. As a result, the blocking signal is outputted from the antenna 16a and blocks the section 2b. During this period, if an unattended inductive car behind runs into a block section 2a, the blocking signal which is outputted by the antenna 16a is supplied to a receiver of the following car. The receiver detects this blocking signal, detects that the section 2b is blocked, and stops running of the following car. Thereafter, when the unattended inductive car which has existed in the section 2b goes out of the section 2b, the blocking signal comes not to be received by the antenna 13b, the blocking signal outputted from the antenna 16a becomes off, and the unattended inductive car behind starts to advance. |
