TRACK CIRCUIT RECEIVER Russian patent published in 1997 - IPC

FIELD: railway transport; perspective systems of railway signalling for checking condition of rail line. SUBSTANCE: device has band pass filter, detector, integrator, sampler rail line check up signal amplitude evaluation unit, cumulative sum calculation unit, switches, store data registers, comparators, summer, subtracter, signal level limiting unit and delay unit. EFFECT: increased reliability owing to accurate evaluation of parameters of signal at moment when rail circuit conditions are changed. 3 dwg