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 claimed invention is the creation of a technical means without disadvantages of the nearest analog, as well as having uniform sensitivity along the entire length of a sensitive element, increase protection from the impact of interference factors, from the impact of drift of measuring properties of a transceiver, low complexity of mounting. Another technical problem solved by the claimed invention is the creation of a technical means expanding the arsenal of technical means – fiber-optic security detectors, as well as their aspects.
EFFECT: elimination of disadvantages of the nearest analog, 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 a guarded perimeter from the impact of interference factors, impact of drift of measuring properties of a transceiver; simplification of mounting due to elimination of the need for use in its composition of compensation coils necessary for compensation of fiber length of a sensitive element; implementation by the invention of its purpose.
9 cl, 12 dwg
