SECURITY ALARM DEVICE Russian patent published in 2011 - IPC G08B13/22 

FIELD: information technology.

SUBSTANCE: security alarm device has a signalling barrier fitted with a detecting element which is connected through a measuring amplifier to a gain-controlled amplifier and an operation indicator, as well as a digital signal processor whose first output is connected to the operation indicator, the second output - to a mode indicator, the third output - to the input of programmable memory, whose output is connected to the first input of the digital signal processor, the second input of which is connected to the output of the gain-controlled amplifier.

EFFECT: high functional reliability and detecting power owing to high noise immunity to natural factors.

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