Distributed acoustic sensing (DAS) system for acoustic event detection based upon covariance matrices and related methods
AssigneeEagle Technology, LLC
InventorsChad Lau, Mark D. Rahmes, Austin Brigham, Kevin Gustke, Stephen Bauman, John Gallo, Shawn Patrick Gallagher
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Abstract
A distributed acoustic sensing (DAS) system may include an optical fiber, a phase-sensitive OTDR (φ-OTDR) coupled to the optical fiber, and a processor cooperating with the φ-OTDR. The processor may be configured to generate a series of covariance matrices for DAS data from the φ-OTDR, and determine an acoustic event based upon comparing the series of covariance matrices with a corresponding Toeplitz matrix.
Claims20
A distributed acoustic sensing (DAS) system comprising:
- an optical fiber;
- a phase-sensitive optical time domain reflectometer (φ-OTDR) coupled to the optical fiber;
- and
- a processor cooperating with the φ-OTDR and configured to
- generate a series of covariance matrices for DAS data from the φ-OTDR, and
- determine an acoustic event based upon comparing the series of covariance matrices with a corresponding Toeplitz matrix.
A distributed acoustic sensing (DAS) device comprising:
- a phase-sensitive optical time domain reflectometer (φ-OTDR) to be coupled to an optical fiber;
- and
- a processor cooperating with the φ-OTDR and configured to
- generate a series of covariance matrices for DAS data from the φ-OTDR, and
- determine an acoustic event based upon comparing the series of covariance matrices with a corresponding Toeplitz matrix.
A distributed acoustic sensing (DAS) method comprising:
- generating a series of covariance matrices using a processor for DAS data from a phase-sensitive optical time domain reflectometer (φ-OTDR) coupled to an optical fiber;
- and
- determining an acoustic event using the processor based upon comparing the series of covariance matrices with a corresponding Toeplitz matrix.
Dependencies are inferred from the claim text.