Waveguide disturbance detection method
Abstract
A method for detection of a disturbance in a waveguide comprising transmitting a wavefield having symmetric and antisymmetric components from a horizontally and/or vertically polarized source and/or pressure source disposed symmetrically with respect to the longitudinal central axis of the waveguide at one end of the waveguide, recording the horizontal and/or vertical component or a pressure of the wavefield with a vertical array of receivers disposed at the opposite end of the waveguide, separating the wavenumber transform of the wavefield into the symmetric and antisymmetric components, integrating the symmetric and antisymmetric components over a broad frequency range, and comparing the magnitude of the symmetric components and the antisymmetric components to an expected magnitude for the symmetric components and the antisymmetric components for a waveguide of uniform thickness and properties thereby determining whether or not a disturbance is present inside the waveguide.
- Inventors:
-
- Albany, CA
- Oakland, CA
- Benicia, CA
- Issue Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- OSTI Identifier:
- 873183
- Patent Number(s):
- 6108606
- Assignee:
- Gas Research Institute (Chicago, IL)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- waveguide; disturbance; detection; method; comprising; transmitting; wavefield; symmetric; antisymmetric; components; horizontally; vertically; polarized; source; pressure; disposed; symmetrically; respect; longitudinal; central; axis; recording; horizontal; vertical; component; array; receivers; opposite; separating; wavenumber; transform; integrating; broad; frequency; range; comparing; magnitude; expected; uniform; thickness; properties; determining; inside; detection method; uniform thickness; central axis; frequency range; pressure source; vertically polarized; /702/
Citation Formats
Korneev, Valeri A, Nihei, Kurt T, and Myer, Larry R. Waveguide disturbance detection method. United States: N. p., 2000.
Web.
Korneev, Valeri A, Nihei, Kurt T, & Myer, Larry R. Waveguide disturbance detection method. United States.
Korneev, Valeri A, Nihei, Kurt T, and Myer, Larry R. Sat .
"Waveguide disturbance detection method". United States. https://www.osti.gov/servlets/purl/873183.
@article{osti_873183,
title = {Waveguide disturbance detection method},
author = {Korneev, Valeri A and Nihei, Kurt T and Myer, Larry R},
abstractNote = {A method for detection of a disturbance in a waveguide comprising transmitting a wavefield having symmetric and antisymmetric components from a horizontally and/or vertically polarized source and/or pressure source disposed symmetrically with respect to the longitudinal central axis of the waveguide at one end of the waveguide, recording the horizontal and/or vertical component or a pressure of the wavefield with a vertical array of receivers disposed at the opposite end of the waveguide, separating the wavenumber transform of the wavefield into the symmetric and antisymmetric components, integrating the symmetric and antisymmetric components over a broad frequency range, and comparing the magnitude of the symmetric components and the antisymmetric components to an expected magnitude for the symmetric components and the antisymmetric components for a waveguide of uniform thickness and properties thereby determining whether or not a disturbance is present inside the waveguide.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}
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Study of the leaking channel modes of in‐seam exploration seismology by means of synthetic seismograms
journal, March 1985
- Franssens, G. R.; Lagasse, P. E.; Mason, I. M.
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