Noninvasive identification of fluids by swept-frequency acoustic interferometry

Title: Noninvasive identification of fluids by swept-frequency acoustic interferometry

Full Record
Other Related Research

Abstract

A method for rapid, noninvasive identification and monitoring of chemicals in sealed containers or containers where direct access to the chemical is not possible is described. Multiple ultrasonic acoustic properties (up to four) of a fluid are simultaneously determined. The present invention can be used for chemical identification and for determining changes in known chemicals from a variety of sources. It is not possible to identify all known chemicals based on the measured parameters, but known classes of chemicals in suspected containers, such as in chemical munitions, can be characterized. In addition, a large number of industrial chemicals can be identified.

Inventors:

Sinha, Dipen N ^[1]

Los Alamos, NM

Issue Date:: 1998-01-01

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

OSTI Identifier:: 871631

Patent Number(s):: 5767407

Assignee:: Regents of University of California (Los Alamos, NM)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

Show more

G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N29/036 - by measuring frequency or resonance of acoustic waves
G01N29/52 - using inversion methods other that spectral analysis, e.g. conjugated gradient inversion
G01N2291/02491 - Materials with nonlinear acoustic properties
G01N2291/0422 - Shear waves, transverse waves, horizontally polarised waves
G01N2291/015 - Attenuation, scattering
G01N2291/02818 - Density, viscosity
G01N29/348 - {with frequency characteristics, e.g. single frequency signals, chirp signals
G01N2291/011 - Velocity or travel time

Show less

DOE Contract Number:: W-7405-ENG-36

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: noninvasive; identification; fluids; swept-frequency; acoustic; interferometry; method; rapid; monitoring; chemicals; sealed; containers; direct; access; chemical; described; multiple; ultrasonic; properties; fluid; simultaneously; determined; determining; changes; variety; sources; identify; based; measured; parameters; suspected; munitions; characterized; addition; industrial; identified; acoustic properties; sealed container; sealed containers; noninvasive identification; measured parameters; frequency acoustic; measured parameter; chemical identification; /73/702/

Citation Formats


                    Sinha, Dipen N. Noninvasive identification of fluids by swept-frequency acoustic interferometry.  United States: N. p., 1998. 
        Web.

Copy to clipboard


                    Sinha, Dipen N. Noninvasive identification of fluids by swept-frequency acoustic interferometry.  United States.

Copy to clipboard


                    Sinha, Dipen N. Thu .  
        "Noninvasive identification of fluids by swept-frequency acoustic interferometry".  United States.  https://www.osti.gov/servlets/purl/871631.

Copy to clipboard


                    
@article{osti_871631,

  title        = {Noninvasive identification of fluids by swept-frequency acoustic interferometry},

  author       = {Sinha, Dipen N},

  abstractNote = {A method for rapid, noninvasive identification and monitoring of chemicals in sealed containers or containers where direct access to the chemical is not possible is described. Multiple ultrasonic acoustic properties (up to four) of a fluid are simultaneously determined. The present invention can be used for chemical identification and for determining changes in known chemicals from a variety of sources. It is not possible to identify all known chemicals based on the measured parameters, but known classes of chemicals in suspected containers, such as in chemical munitions, can be characterized. In addition, a large number of industrial chemicals can be identified.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1998},

  month        = {1}

}

Copy to clipboard

Patent:

View Patent

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE Patents and OSTI.GOV collections:

Fluid density and concentration measurement using noninvasive in situ ultrasonic resonance interferometry

Patent Pope, Noah G [Los Alamos, NM]; Veirs, Douglas K [Espanola, NM]; Claytor, Thomas N [Los Alamos, NM]

The specific gravity or solute concentration of a process fluid solution located in a selected structure is determined by obtaining a resonance response spectrum of the fluid/structure over a range of frequencies that are outside the response of the structure itself. A fast fourier transform (FFT) of the resonance response spectrum is performed to form a set of FFT values. A peak value for the FFT values is determined, e.g., by curve fitting, to output a process parameter that is functionally related to the specific gravity and solute concentration of the process fluid solution. Calibration curves are required to correlatemore »« less
Full Text Available
Noninvasive characterization of a flowing multiphase fluid using ultrasonic interferometry

Patent Sinha, Dipen N.

An apparatus for noninvasively monitoring the flow and/or the composition of a flowing liquid using ultrasound is described. The position of the resonance peaks for a fluid excited by a swept-frequency ultrasonic signal have been found to change frequency both in response to a change in composition and in response to a change in the flow velocity thereof. Additionally, the distance between successive resonance peaks does not change as a function of flow, but rather in response to a change in composition. Thus, a measurement of both parameters (resonance position and resonance spacing), once calibrated, permits the simultaneous determination ofmore »« less
Full Text Available
Noninvasive characterization of a flowing multiphase fluid using ultrasonic interferometry

Patent Sinha, Dipen N [Los Alamos, NM]

An apparatus for noninvasively monitoring the flow and/or the composition of a flowing liquid using ultrasound is described. The position of the resonance peaks for a fluid excited by a swept-frequency ultrasonic signal have been found to change frequency both in response to a change in composition and in response to a change in the flow velocity thereof. Additionally, the distance between successive resonance peaks does not change as a function of flow, but rather in response to a change in composition. Thus, a measurement of both parameters (resonance position and resonance spacing), once calibrated, permits the simultaneous determination ofmore »« less
Full Text Available
Noninvasive Characterization Of A Flowing Multiphase Fluid Using Ultrasonic Interferometry

Patent Sinha, Dipen N [Los Alamos, NM]

An apparatus for noninvasively monitoring the flow and/or the composition of a flowing liquid using ultrasound is described. The position of the resonance peaks for a fluid excited by a swept-frequency ultrasonic signal have been found to change frequency both in response to a change in composition and in response to a change in the flow velocity thereof. Additionally, the distance between successive resonance peaks does not change as a function of flow, but rather in response to a change in composition. Thus, a measurement of both parameters (resonance position and resonance spacing), once calibrated, permits the simultaneous determination ofmore »« less
Full Text Available
Method for noninvasive determination of acoustic properties of fluids inside pipes

Patent

A method for determining the composition of fluids flowing through pipes from noninvasive measurements of acoustic properties of the fluid is described. The method includes exciting a first transducer located on the external surface of the pipe through which the fluid under investigation is flowing, to generate an ultrasound chirp signal, as opposed to conventional pulses. The chirp signal is received by a second transducer disposed on the external surface of the pipe opposing the location of the first transducer, from which the transit time through the fluid is determined and the sound speed of the ultrasound in the fluidmore »« less
Full Text Available

Similar Records