FIELD: guarding engineering.
SUBSTANCE: device comprises receiving member and equipment of observation station. The receiving system comprises modules made of geophones arranged over the boundary and inside the zone to be guarded in groups of three or more geophones, and unit of preamplifiers. The input of each preamplifier is connected with one or several geophones. The equipment of the observation station has unit of band-pass amplifiers connected with the unit of preamplifiers, arrangement for digital processing of signals, and power source.
EFFECT: enhanced reliability.
11 cl, 22 dwg
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