Waveguide disturbance detection method

Patent · 01 January 2000

OSTI ID:873183

Korneev, Valeri A ^[1]; Nihei, Kurt T ^[2]; Myer, Larry R ^[3]

---

1. Albany, CA
2. Oakland, CA
3. Benicia, CA

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.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
• DOE Contract Number: AC03-76SF00098
• Assignee: Gas Research Institute (Chicago, IL)
• Patent Number(s): US 6108606
• OSTI ID: 873183
• Country of Publication: United States
• Language: English

Related Subjects

/702/
antisymmetric
array
axis
broad
central
central axis
comparing
component
components
comprising
detection
detection method
determining
disposed
disturbance
expected
frequency
frequency range
horizontal
horizontally
inside
integrating
longitudinal
magnitude
method
opposite
polarized
pressure
pressure source
properties
range
receivers
recording
respect
separating
source
symmetric
symmetrically
thickness
transform
transmitting
uniform
uniform thickness
vertical
vertically
vertically polarized
wavefield
waveguide
wavenumber