SINGLE-BAND DIGITAL FILTER FOR AUTOMATIC LOCOMOTIVE ALARM

摘要

FIELD: physics.;SUBSTANCE: invention relates to means of digital filtration of signals of automatic locomotive signalling. Filter includes in-series connected overvoltage protection unit, analogue-to-digital converter, digital filter with infinite impulse response, implemented on microcontroller, and digital-to-analogue converter, wherein said converters and IIR-filter are connected to voltage converter. Filter has a pass band width of 8 Hz and transmits only the upper band of the amplitude-shift keyed signal.;EFFECT: higher coefficient of orthogonality of amplitude-frequency characteristics and attenuation of noise outside the pass band, reduced effect of interference on stability of CACS locomotive devices.;1 cl, 1 dwg