| 摘要 |
PURPOSE:To perform highly noise-proof detection of a train position by provid ing a detecting means that detects the presence of a train on a rail with the existence of a coincidence state that a PN code coincidence degree detecting means detected, and an information outputting means that, when an interval detecting means detected the interval of a specified pulse, outputs the informa tion that responds to that interval. CONSTITUTION:A matched filter 12 detects whether PN codes (PNi, PNi' (thetai'')) exist or not while a demodulator circuit 11 is in the course of output, and a pulse signal is generated each time it detects the existence, and raises a track relay(TR) contingent on the generation of the pulse signal. At this juncture, even noise caused by a commercial power source higher harmonic wave or noise transmitted from a train that travels on another track adjacent to a track (T), etc., for example, exists in a block section (Ti), this train position detecting device can obtain the pulse signal in defiance of such noise, therefore, can make the detection extremely high noise-proof train position detection. |
