VIBRO-METRIC INTRUDER ALARM DEVICE Russian patent published in 2008 - IPC G08B13/00 

FIELD: intruder alarms, namely - vibro-metric devices which signal intrusion in territory of protected object, who overcome metallic physical barriers by destroying them with various methods: blasting, sawing and chopping.

SUBSTANCE: device contains sensitive element, which consists of a group of individual vibration transformers, which are connected to wired communication line which connects them to duty panel. Each vibration transformer is fastened on local section of metallic physical barrier and records characteristic vibrations of that section, thus determining the local sensitivity zone. On detection of destructive influence at any one of the local sections, duty panel generates alarm signal.

EFFECT: detection and identification of methods of destructive influence, ensured continuous control of tear and bridging of sensitive element, increased reliability of detection and increased interference resistance of the device.

4 cl, 5 dwg