DEVICE FOR CENTRALISED AUTOMATIC BLOCKING WITH SEAMLESS TONAL FREQUENCY RAIL CIRCUITS Russian patent published in 2015 - IPC B61L23/16 

FIELD: radio engineering, communication.

SUBSTANCE: device comprises, in each subset of post automatic blocking equipment of each railway haul section, a unit of tonal frequency rail circuit signal generators, cable line conductors, rail lines, a unit of tonal frequency rail circuit signal receivers, a unit for monitoring successive occupancy of the rail circuits, a unit for monitoring successive freeing up of rail circuits, a blocking relay unit, a signal relay unit, a unit for connecting code signals to the rail circuits, a rail circuit coding connection unit. The device further includes a low-frequency rail circuit signal generator, a low-frequency rail circuit signal receiver and a testing unit, a rest and reconfiguration signal generating unit and an artificial point setting signal circuit.

EFFECT: high reliability of checking freeness and intactness of a rail line.

1 dwg