FIELD: measuring equipment.
SUBSTANCE: invention relates to measuring equipment using optical fiber, namely to fiber-optic security detectors, as well as to products, methods and means related to fiber-optic security detectors and their aspects. The technical problem solved by the invention is the creation of a technical means that does not have disadvantages of the nearest analogue, as well as has uniform sensitivity along the entire length of a sensing element, increased protection from the impact of interference factors, from the impact of drift of measuring properties of a transceiver, low complexity of installation. Another technical problem solved by the invention is the creation of a technical means that expands the arsenal of technical means –fiber-optic security detectors, as well as their aspects.
EFFECT: elimination of disadvantages of the nearest analogue, namely, provision of uniform sensitivity of a sensitive part of a fiber-optic security detector; increase in the reliability of the fiber-optic security detector, in particular, due to the reception of two signals from the same probing pulse, which provides greater protection of the protected perimeter from the impact of interference factors, the impact of the drift of measuring properties of a transceiver; simplification of installation due to the elimination of the need to use compensation coils in its composition, which are necessary to compensate for the length of fibers of a sensing element; the implementation by the invention of its purpose.
6 cl, 12 dwg
