SYSTEM FOR RADIO-TELEPHONE MESSAGES ON HIGHWAYS Russian patent published in 2010 - IPC G08B25/12 B61L29/22 B60Q9/00 

FIELD: information technologies.

SUBSTANCE: system includes SOS-system, two radio transmitters and radio receiver. SOS-system includes solar battery, solar paraboloid optical hubs, arsenide-gallium converters, photodiodes, reflectors, selsyns, hemispherical cap, tight box, microphones, call buttons, transceiving antenna. Boxes are fixed to distribution barrier. Radio transmitter installed on locomotive comprises microprocessor, high frequency generator, multi-tap delay line, phase inverters, summator, telegraph key, power amplifier and transmitting antenna. Radio equipment at the crossing comprises duplexer with transceiving antenna and radio transmitter. The latter comprises delay line, phase detector, memory unit, unit of codes comparison, two actuation units, signal panel, sound and light alarms, two narrow-band filters, three phase inverters, four summators, heterodyne, two mixers, two amplifiers of intermediate frequency, two phase inverters of 90°, multiplier, amplitude detector and key.

EFFECT: system provides for suppression of false signals (noise) received along channel of direct passage, mirror, combination and intermodulation channels; as a result, selectivity and noise immunity of radio transmitter are improved.

6 dwg