Patent ID: 8928480
Filing Date: 2015-01-06
Classification: B63G,F41H,G02B,G08B

Abstract:
1. A fence for establishing a secure marine perimeter, comprising: an optic fiber net, wherein the optic fiber net includes at least one optic fiber wire, the optic fiber wire having an input end and an output end, wherein the optic fiber wire comprises an optic fiber, a first jacket cladding the optic fiber, a plurality of strength fibers surrounding the first jacket, the plurality of strength fibers comprising a water swellable material, a strength member, wrapped around the first jacket, the strength member enhancing at least a tensile strength of the optic fiber net, and a second jacket surrounding the optic fiber, the first jacket, the plurality of strength fibers, and the strength member; a light transmitter connected to the input end to introduce an input optic signal into the optic fiber wire; a light receiver connected to the output end to receive an output optic signal from the optic fiber wire; an electrical transmitter connected to an input end of the strength member to introduce an input electrical signal into the strength member; and an electrical receiver connected to an output end of the strength member to receive an output electrical signal from the strength member; and a processor connected at least to the light receiver to generate a first output signal based at least on the output optic signal, to compare the output optic signal with the input optic signal, and to generate a first alarm if a difference between the input optic signal and the output optic signal exceeds a first predetermined alarm threshold, wherein the processor also generates a second output signal based at least on the output electrical signal, compares the output electrical signal with the input electrical signal, and generates a second alarm if a difference between the input electrical signal and the output electrical signal exceeds a second predetermined alarm threshold.