FIELD: physics; signalling.
SUBSTANCE: invention relates to burglar alarm systems, in particular, to intruder detection magnetometric devices (means, annunciators) based on passive method of registration of magnetic field change caused by protected boundary crossing. Technical effect is enhanced immunity to long-range high-power electromagnetic interference, increased probability of object detection due to reduced nonuniformity of response of magnitometric device to different orientations of magnetic dipole (object to be detected), as well as wider field of application. The said effect is achieved by using helical magnitometric device.
EFFECT: enhanced immunity to long-range high-power electromagnetic interference and incresed probability of object detection.
7 dwg
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