| 摘要 |
<p>An information generator which transmits/receives an elastic wave through a transmission medium and generates information necessary for control/monitoring of elements related to a control system. An elastic wave is transmitted/received by utilizing the moving route (2, 111, 112, 211, 211') of a moving unit (1, 151, 213) as a transmission medium and, in accordance with receiving state of the received elastic wave such as the change of its reception level, its propagation time, etc., alarm start timing information at a crossing, moving unit presence/absence information in the moving route, presence/absence information of the breakage of the moving route, automatic train control information, etc. are generated.</p> |
