Patent ID: 11866076
Assignee: SIEMENS MOBILITY GMBH
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. A method of monitoring a railroad track block, said track method comprising:
providing a first occupied track device at a first end of the block;
providing a second occupied track device at a second end of the block;
calibrating the first occupied track device in accordance with an impedance of the second occupied track device;
calibrating the second occupied track device in accordance with an impedance of the first occupied track device;
performing a DC function to detect a presence of a train on rails of the block; and
once the presence of the train is detected, performing an AC function to determine an amount of unoccupied track behind the train; and
detecting one or more broken rails in the block, while the train is in the block, based on one or more impedance readings along the rails of the track.