FIELD: fiber optics, in particular, signal devices based on fiber optics, applicable in systems of protection of the perimeter of territories and rooms against unauthorized access.
SUBSTANCE: at least one optoelectronic measurement channel, at least two optoelectronic sensitive elements and a decoder are introduced; the sections of the multi-mode fiber of all optoelectronic measurement chamber are assembled in a cable, the optoelectronic sensitive elements are distributed along the cable and made in the form of section of multi-mode fiber interconnected inside the fiber-optical sensitive elements into combinations, corresponding to the ordinal number of the sensitive element.
EFFECT: enhanced system efficiency due to the obtained additional information about the location of the attack.
3 cl, 3 dwg
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