fibre optic acoustic sensing

fibre optic acoustic sensing

  • CN 102,197,284 B
  • Filed: 08/21/2009
  • Issued: 10/26/2016
  • Est. Priority Date: 08/21/2008
  • Status: Active Grant
First Claim
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1. in solid dielectric, detect P ripple and a method for S ripple, comprise:

  • At least the first light pulse and the second light pulse are repeatedly transmitted into the light being at least partially situated in described solid dielectricIn fibre, wherein the first light pulse and the second light pulse have the first optical frequency rate variance;

    Detection is from the backscattered light of fiber Rayleigh;

    Analyze backscattered light to determine the survey for the interference of each in multiple discrete longitudinal sensing part of optical fiberAmount;

    AndAnalyze the differentiation of interference in discrete longitudinal sensing part with detection P ripple and S ripple, wherein, analyze discrete longitudinal detecting partThe differentiation of the interference in Fen comprises the First Series interference identified in the plurality of discrete longitudinal sensing part, is followed by slower secondRelevant series interference.

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