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Title: 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:
 [1];  [2];  [3]
  1. (Albany, CA)
  2. (Oakland, CA)
  3. (Benicia, CA)
Issue Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
OSTI Identifier:
873183
Patent Number(s):
6108606
Assignee:
Gas Research Institute (Chicago, IL) LBNL
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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