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Title: Resonant ultrasound spectrometer

Abstract

An ultrasound resonant spectrometer determines the resonant frequency spectrum of a rectangular parallelepiped sample of a high dissipation material over an expected resonant response frequency range. A sample holder structure grips corners of the sample between piezoelectric drive and receive transducers. Each transducer is mounted on a membrane for only weakly coupling the transducer to the holder structure and operatively contacts a material effective to remove system resonant responses at the transducer from the expected response range. i.e., either a material such as diamond to move the response frequencies above the range or a damping powder to preclude response within the range. A square-law detector amplifier receives the response signal and retransmits the signal on an isolated shield of connecting cabling to remove cabling capacitive effects. The amplifier also provides a substantially frequency independently voltage divider with the receive transducer. The spectrometer is extremely sensitive to enable low amplitude resonance to be detected for use in calculating the elastic constants of the high dissipation sample.

Inventors:
 [1];  [2];  [1]
  1. (Santa Fe, NM)
  2. (Los Alamos, NM)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
867631
Patent Number(s):
US 4976148
Assignee:
United Stated of America as represented by Department of Energy (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
resonant; ultrasound; spectrometer; determines; frequency; spectrum; rectangular; parallelepiped; sample; dissipation; material; expected; response; range; holder; structure; grips; corners; piezoelectric; drive; receive; transducers; transducer; mounted; membrane; weakly; coupling; operatively; contacts; effective; remove; responses; diamond; move; frequencies; damping; powder; preclude; square-law; detector; amplifier; receives; signal; retransmits; isolated; shield; connecting; cabling; capacitive; effects; provides; substantially; independently; voltage; divider; extremely; sensitive; enable; amplitude; resonance; detected; calculating; elastic; constants; resonant response; response signal; resonant ultrasound; extremely sensitive; sample holder; resonant frequency; frequency range; frequency spectrum; voltage divider; response range; spectrometer determines; rectangular parallelepiped; piezoelectric drive; electric drive; /73/310/702/

Citation Formats

Migliori, Albert, Visscher, William M., and Fisk, Zachary. Resonant ultrasound spectrometer. United States: N. p., 1990. Web.
Migliori, Albert, Visscher, William M., & Fisk, Zachary. Resonant ultrasound spectrometer. United States.
Migliori, Albert, Visscher, William M., and Fisk, Zachary. Mon . "Resonant ultrasound spectrometer". United States. https://www.osti.gov/servlets/purl/867631.
@article{osti_867631,
title = {Resonant ultrasound spectrometer},
author = {Migliori, Albert and Visscher, William M. and Fisk, Zachary},
abstractNote = {An ultrasound resonant spectrometer determines the resonant frequency spectrum of a rectangular parallelepiped sample of a high dissipation material over an expected resonant response frequency range. A sample holder structure grips corners of the sample between piezoelectric drive and receive transducers. Each transducer is mounted on a membrane for only weakly coupling the transducer to the holder structure and operatively contacts a material effective to remove system resonant responses at the transducer from the expected response range. i.e., either a material such as diamond to move the response frequencies above the range or a damping powder to preclude response within the range. A square-law detector amplifier receives the response signal and retransmits the signal on an isolated shield of connecting cabling to remove cabling capacitive effects. The amplifier also provides a substantially frequency independently voltage divider with the receive transducer. The spectrometer is extremely sensitive to enable low amplitude resonance to be detected for use in calculating the elastic constants of the high dissipation sample.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1990},
month = {Mon Jan 01 00:00:00 EST 1990}
}

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