RECEIVER OF AUTOMATIC LOCOMOTIVE SIGNALLING SYSTEM MULTI-DIGIT SIGNALS (ALS-EN)

摘要

FIELD: transport.;SUBSTANCE: invention can be used in automatic locomotive multi-digit signalling systems (ALS-EN) for reception of encoded ALS-EN signals. The proposed ALS-EN receiver comprises input channel (1) containing amplifier (4), automatic amplification adjustment unit (5), low-pass filter (6), ADC and digital bandpass filter (8), demodulator (2) incorporating clock-pulse oscillator (9), delay line (10), phase shifters (11) and (12), phase detectors (13) and (14), low-pass digital filters (15) and (16), digital comparators (17) and (18), conversion unit (19),decoder (3) incorporating shift registers (20) and (21), comparator unit (22) and ROM (23). The conversion unit (19) comprises logical elements (24) and (25), logical elements "2AND" (26), (27) and (28), triggers (29) and (30), timer (31), logical element "2OR" (32) and delay element (33).;EFFECT: higher noise immunity of ALS-EN receiver.;2 dwg