FIELD: security systems.
SUBSTANCE: invention relates to security and can be used to control safety of sealed objects. Invention is characterized by the fact that after putting the seal for the loop of the conductive cable, determining the normal value of the complex impedance of the magnetically coupled system, consisting of a loop-connected current-conducting cable of the initial length and a toroidal inductance coil, setting and memorizing the interval of permissible changes in the value of complex impedance, periodically determining the current value of complex impedance of said magnetically coupled system, and when output current value of complex impedance beyond limits of permissible changes make conclusion on unauthorized intrusion on protected object.
EFFECT: simplified hardware implementation and increased reliability of the method of monitoring the integrity of an object sealed with a cable seal.
1 cl, 2 dwg
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