FIELD: measuring equipment.
SUBSTANCE: fiber optic security detectors, as well as products, methods and means related to fiber optic security detectors and their aspects. The security alarm system contains a fence with a movable element with a sensitive element of a dynamic fiber-optic sensor of a security fiber-optic detector placed on it, and the fence contains a movable element configured to place a housing of a dynamic fiber-optic sensor (DFOS) on it. Moreover, DFOS is a sensor containing a housing configured to accommodate a sensitive element of the sensor formed by a coil of optical fibers, and a splitter, the outputs of which are closed to each other by this coil and form a closed loop that generates a reflection signal, and the splitter is configured to connect with transport part of the fiber optic security detector.
EFFECT: elimination of the need to use electrical energy to operate a dynamic fiber optic sensor.
9 cl, 12 dwg
