FIELD: protection of premises against unauthorized intrusion or warning about such intrusion or about movements in guarded locations.
SUBSTANCE: device has sensing element which is essentially floor covering of three layers of flexible electricity conducting material; upper and lower layers are made of elastic conducting material in the form of riffles, those of lower layer being disposed perpendicular to riffles of upper layer; internal layer of covering is made of flexible porous conducting material; butt-ends of upper and lower riffles are connected to recording unit and the latter is connected to alarm and/or indicating signal shaping unit.
EFFECT: enhanced reliability of intrusion protection and inspection of various locations and areas.
5 cl, 6 dwg
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