ALARM SIGNALING DEVICE Russian patent published in 2007 - IPC G08B13/24 

FIELD: intrusion protection equipment, possible use when outfitting perimeters of various objects.

SUBSTANCE: device contains high frequency generator, controllable attenuator, modulator, video impulse generator, power amplifier, transmitting block, receiving block, high frequency amplifier, synchronous detector, video impulse amplifier, comparators, time relay accumulators, reverse counter, digital-analog converter, AND element. Device design structure represents a closed automatic control system with practically instant compensation of signal level changes at high frequency amplifier input due to adjustment of level of emitted power and decision making process about presence of intruder within limits of controlled zone due to logical processing of number and a series of adjustment commands.

EFFECT: increased resistance to interference.

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