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Title: Apparatus and method for measuring and imaging traveling waves

Abstract

An apparatus is provided for imaging traveling waves in a medium. The apparatus includes a vibration excitation source configured to impart traveling waves within a medium. An emitter is configured to produce two or more wavefronts, at least one wavefront modulated by a vibrating medium. A modulator is configured to modulate another wavefront in synchronization with the vibrating medium. A sensing media is configured to receive in combination the modulated one wavefront and the another wavefront and having a detection resolution within a limited bandwidth. The another wavefront is modulated at a frequency such that a difference frequency between the one wavefront and the another wavefront is within a response range of the sensing media. Such modulation produces an image of the vibrating medium having an output intensity that is substantially linear with small physical variations within the vibrating medium for all vibration frequencies above the sensing media's response bandwidth. A detector is configured to detect an image of traveling waves in the vibrating medium resulting from interference between the modulated one wavefront and the another wavefront when combined in association with the sensing media. The traveling wave can be used to characterize certain material properties of the medium. Furthermore,more » a method is provided for imaging and characterizing material properties according to the apparatus.« less

Inventors:
 [1];  [1]
  1. Idaho Falls, ID
Issue Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
OSTI Identifier:
873502
Patent Number(s):
6175411
Assignee:
Bechtel BWXT Idaho, LLC (Idaho Falls, ID)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01H - MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; method; measuring; imaging; traveling; waves; provided; medium; vibration; excitation; source; configured; impart; emitter; produce; wavefronts; wavefront; modulated; vibrating; modulator; modulate; synchronization; sensing; media; receive; combination; detection; resolution; limited; bandwidth; frequency; difference; response; range; modulation; produces; image; output; intensity; substantially; linear; physical; variations; frequencies; detector; detect; resulting; interference; combined; association; wave; characterize; material; properties; furthermore; characterizing; according; substantially linear; excitation source; traveling waves; traveling wave; material properties; difference frequency; sensing media; response range; limited bandwidth; output intensity; response band; imaging traveling; vibration excitation; detection resolution; /356/

Citation Formats

Telschow, Kenneth L, and Deason, Vance A. Apparatus and method for measuring and imaging traveling waves. United States: N. p., 2001. Web.
Telschow, Kenneth L, & Deason, Vance A. Apparatus and method for measuring and imaging traveling waves. United States.
Telschow, Kenneth L, and Deason, Vance A. Mon . "Apparatus and method for measuring and imaging traveling waves". United States. https://www.osti.gov/servlets/purl/873502.
@article{osti_873502,
title = {Apparatus and method for measuring and imaging traveling waves},
author = {Telschow, Kenneth L and Deason, Vance A},
abstractNote = {An apparatus is provided for imaging traveling waves in a medium. The apparatus includes a vibration excitation source configured to impart traveling waves within a medium. An emitter is configured to produce two or more wavefronts, at least one wavefront modulated by a vibrating medium. A modulator is configured to modulate another wavefront in synchronization with the vibrating medium. A sensing media is configured to receive in combination the modulated one wavefront and the another wavefront and having a detection resolution within a limited bandwidth. The another wavefront is modulated at a frequency such that a difference frequency between the one wavefront and the another wavefront is within a response range of the sensing media. Such modulation produces an image of the vibrating medium having an output intensity that is substantially linear with small physical variations within the vibrating medium for all vibration frequencies above the sensing media's response bandwidth. A detector is configured to detect an image of traveling waves in the vibrating medium resulting from interference between the modulated one wavefront and the another wavefront when combined in association with the sensing media. The traveling wave can be used to characterize certain material properties of the medium. Furthermore, a method is provided for imaging and characterizing material properties according to the apparatus.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

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