RAIL CIRCUIT Russian patent published in 2019 - IPC B61L23/16 

FIELD: transport traffic control systems.

SUBSTANCE: invention relates to railway automation for interval traffic control of trains. Rail circuit contains a rail line, to one end of which a track generator is connected through the first coupling capacitor, track receiver is connected to the other end through the second coupling capacitor, the circuit is tuned to resonance at the carrier frequency of the rail line control signal. Control signal of the rail line is supplied by coded parcels, it has phase-code manipulation with a code interval duration of at least one period of the first harmonic of the variable component of the asymmetry of the traction current in the rails. Code message of the control signal rail line contains an even number of code intervals, and each code interval having a carrier frequency with phase ϕ, corresponds to the code interval with the phase ϕ+180°.

EFFECT: effect of the asymmetry of the traction current on the fluctuation of the signal level at the receiver input of the track circuit is reduced, the reliability of the track circuit is increased.

1 cl, 1 tbl, 4 dwg