FIELD: instrumentation engineering; unauthorized invasion alarms . SUBSTANCE: device can be used for guarding metal objects (safes, stands, cars, and so on) and for guarding territories in presence of spatially- oriented antennas or other means for guarding territories or things, such as valuables, books, works of art, and so on has means for measuring electrostatic field strength, receiving residual signal, its integration, and division of residual signal by integrated one. EFFECT: enhanced reliability of unauthorized impact detection. 3 cl, 1 dwg
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|
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