Patent ID: 8583298
Filing Date: 2013-11-12
Classification: B61L

Abstract:
1. A signal system on a railway vehicle comprising: an on-vehicle receiver for receiving ground signals used for controlling the railway vehicle from a loop coil disposed on a track on the ground; a first antenna for receiving ground signals from the loop coil; and a second antenna disposed rearward from the first antenna in a direction of travel of the railway vehicle for receiving ground signals from the loop coil; wherein the first antenna and the second antenna are mutually connected to transmit the ground signals to the on-vehicle receiver; the first antenna has a receiver sensitivity for receiving signals from the loop coil that differs from the second antenna; turns of coil of the first antenna and turns of coil of the second antenna are different so as to differentiate a signal level of the ground signals received from the first antenna and the signal level of the ground signals received from the second antenna; the first antenna and the second antenna are series-connected and connected with the on-vehicle receiver; and a difference between a signal level received via the first antenna and a signal level received via the second antenna satisfies a signal level capable of performing control of the railway vehicle.