US Patent 7755971 Sensing system
Patent 7755971 was granted and assigned to British Telecommunications Public Limited Company on July, 2010 by the United States Patent and Trademark Office.
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The present invention relates to a sensing system, in particular to sensing system for sensing undersea seismic events. A vibration sensor is provided for sensing seismic vibrations on the sea bed is provided. The vibration sensor is electrically coupled to a transmitter unit, the transmitter unit being arranged to transmit, in use, an acoustic wave from which the presence of a seismic vibration can be inferred. The acoustic wave modulates light travelling along a nearby optical cable, the modulation being recovered at a distant monitoring station. A flotation arrangement is provide for retaining the transmitter unit in a raised position relative to the sea bed to facilitate the coupling of the acoustic wave to the optical cable.
US Patent 07755971 Sensing system US Patent 7755971 Sensing system
US Patent 07755971 Sensing system
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