Patent ID: 8200049
Filing Date: 2012-06-12
Classification: G01M,G02B,G08B

Abstract:
1. A system for monitoring an object and for locating a position of a disturbance event, comprising: a transceiver producing a first, a second and a third optical signals entering a first, a second and a third optical fibers; the first, second and third fibers forming at least a first loop, wherein the first and the second fiber forming the loop clockwise, while the third fiber is winded along the same loop counterclockwise; the first, second and third fibers having a returning point; the returning point being a coupler operating in both directions; the coupler having a first, a second, a third input-outputs; the first, second and third input-outputs being connected to the first, second and third fibers respectively; the first, second and third signals becoming a fourth, a fifth and a sixth optical signals after passing the returning point; the fourth, fifth and sixth optical signals propagating from the returning point towards the transceiver along the first, second and third fibers respectively; the first, second and third fibers being capable of having some characteristic of the first, second, third, fourth, fifth and sixth signals modified or affected by the disturbance event; and detector means for detecting the modified fourth, fifth and sixth optical signals and for determining a difference between the receiving times of the modified signals in order to locate the disturbance event.