Patent ID: 8345229
Filing Date: 2013-01-01
Classification: G01D,G01H,G01M,G01S,G01V,G08B

Abstract:
1. A long-distance monitoring system comprising: a first optical fiber; a sensing unit comprising: an analyzer remote from the sensing unit and configured to receive a first signal via the first optical fiber representative of the first optical return signal from the remote sensing unit and determine a location of a disturbance based on the first signal using a multi-dimensional layout, wherein the analyzer determines the location of the disturbance using the acoustic signal, wherein if a source of the disturbance moves, the location of the disturbance is determined at various times, and wherein the optical energy injected into the first optical fiber has a wavelength that is different from a wavelength of the first signal; a communication unit configured to transmit one of: a power source remote from the sensing unit and configured to provide power over a second metallic wire; and a power subsystem configured to receive the power via the second metallic wire.