GUARDING ALARM DEVICE Russian patent published in 1999 - IPC

FIELD: protection against intruders destroying glass framed structures. SUBSTANCE: device has sensitive element, voltage stabilizer, digital analyzer, units for testing and generation of alarm signal. Device provides safety against electromagnetic noise and short-term drops of power supply voltage without loss of monitoring of premises to be protected for significant duration of voltage drop below tolerant range. Additional digital signal processing includes detection of additional information feature corresponding to destruction of guarded glass framed structures. EFFECT: increased functional reliability, increased validity for detection of intrusion. 4 cl, 1 dwg