The principles of construction of fibre-optic sensors for object protection

The conception of construction of "intelligent" fibre-optic sensors for object protection is considered in the report. Basic element of every system, and particularly of the system of object protection, is its supply mains. The devices included into componentry of the system of protection must be without a pause. The continuity of work of the0 system is achieved due to doubling of the supply mains. The pick detector measures the amplitude of voltage which is proportional to a function of interference contrast. The lack of signal on detectors indicates the mechanical sabotage.