WO2002006814A3 - A system and method of determining porosity in composite materials using ultrasound - Google Patents

A system and method of determining porosity in composite materials using ultrasound Download PDF

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Publication number
WO2002006814A3
WO2002006814A3 PCT/US2001/022156 US0122156W WO0206814A3 WO 2002006814 A3 WO2002006814 A3 WO 2002006814A3 US 0122156 W US0122156 W US 0122156W WO 0206814 A3 WO0206814 A3 WO 0206814A3
Authority
WO
WIPO (PCT)
Prior art keywords
sample
ultrasonic signal
composite material
frequency spectrum
ultrasonic
Prior art date
Application number
PCT/US2001/022156
Other languages
French (fr)
Other versions
WO2002006814A2 (en
Inventor
Marc Dubois
Peter W Lorraine
Thomas E Drake Jr
Robert J Filkins
John B Deaton Jr
Original Assignee
Lockheed Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lockheed Corp filed Critical Lockheed Corp
Priority to IL15380701A priority Critical patent/IL153807A0/en
Priority to CA002411628A priority patent/CA2411628C/en
Priority to KR10-2003-7000507A priority patent/KR20030015389A/en
Priority to AU2002222955A priority patent/AU2002222955A1/en
Priority to JP2002512674A priority patent/JP4789394B2/en
Priority to EP01984264A priority patent/EP1301778B1/en
Publication of WO2002006814A2 publication Critical patent/WO2002006814A2/en
Publication of WO2002006814A3 publication Critical patent/WO2002006814A3/en
Priority to NO20030183A priority patent/NO20030183D0/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/46—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by spectral analysis, e.g. Fourier analysis or wavelet analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/11—Analysing solids by measuring attenuation of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2418—Probes using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/449—Statistical methods not provided for in G01N29/4409, e.g. averaging, smoothing and interpolation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/01—Indexing codes associated with the measuring variable
    • G01N2291/014—Resonance or resonant frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids
    • G01N2291/0231—Composite or layered materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/024—Mixtures
    • G01N2291/0245—Gases in porous solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/0289—Internal structure, e.g. defects, grain size, texture
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0421—Longitudinal waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/044—Internal reflections (echoes), e.g. on walls or defects

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  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Acoustics & Sound (AREA)
  • Probability & Statistics with Applications (AREA)
  • Optics & Photonics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The invention provides for ultrasonically measuring the porosity in a sample composite material by accessing only one side of the sample composite material and includes the steps of measuring a sample ultrasonic signal from the sample composite material, normalizing the sample ultrasonic signal relative to the surface echo of the sample composite material, and isolating a sample back-wall echo signal from the sample ultrasonic signal. A sample frequency spectrum of the sample back-wall ultrasonic signal is then determined. Next, the method and system include the steps of measuring a reference ultrasonic signal from a reference composite material, normalizing the reference ultrasonic signal relative to the surface echo of the reference composite material; and isolating a reference back-wall echo signal from the sample ultrasonic signal. A reference frequency spectrum of the reference back-wall ultrasonic signal is then determined. The invention further includes deriving the ultrasonic attenuation of the sample ultrasonic signal as the ratio of the sample frequency spectrum to the reference frequency spectrum over a predetermined frequency range. Comparing the derived ultrasonic attenuation to predetermined attenuation standards permits evaluating the porosity of the sampled composite material.
PCT/US2001/022156 2000-07-14 2001-07-13 A system and method of determining porosity in composite materials using ultrasound WO2002006814A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
IL15380701A IL153807A0 (en) 2000-07-14 2001-07-13 A system and method of determining porosity in composite materials using ultrasound
CA002411628A CA2411628C (en) 2000-07-14 2001-07-13 A system and method of determining porosity in composite materials using ultrasound
KR10-2003-7000507A KR20030015389A (en) 2000-07-14 2001-07-13 A system and method of determining porosity in composite materials using ultrasound
AU2002222955A AU2002222955A1 (en) 2000-07-14 2001-07-13 A system and method of determining porosity in composite materials using ultrasound
JP2002512674A JP4789394B2 (en) 2000-07-14 2001-07-13 System and method for detecting porosity of composite materials using ultrasound
EP01984264A EP1301778B1 (en) 2000-07-14 2001-07-13 A system and method of determining porosity in composite materials using ultrasound
NO20030183A NO20030183D0 (en) 2000-07-14 2003-01-14 System and method for determining porosity composite materials using ultrasound

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21834100P 2000-07-14 2000-07-14
US60/218,341 2000-07-14

Publications (2)

Publication Number Publication Date
WO2002006814A2 WO2002006814A2 (en) 2002-01-24
WO2002006814A3 true WO2002006814A3 (en) 2002-09-26

Family

ID=22814717

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/022156 WO2002006814A2 (en) 2000-07-14 2001-07-13 A system and method of determining porosity in composite materials using ultrasound

Country Status (9)

Country Link
US (1) US6684701B2 (en)
EP (1) EP1301778B1 (en)
JP (1) JP4789394B2 (en)
KR (1) KR20030015389A (en)
AU (1) AU2002222955A1 (en)
CA (1) CA2411628C (en)
IL (1) IL153807A0 (en)
NO (1) NO20030183D0 (en)
WO (1) WO2002006814A2 (en)

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Also Published As

Publication number Publication date
WO2002006814A2 (en) 2002-01-24
JP2004515748A (en) 2004-05-27
NO20030183L (en) 2002-01-24
IL153807A0 (en) 2003-07-31
EP1301778B1 (en) 2012-06-13
CA2411628C (en) 2009-12-01
AU2002222955A1 (en) 2002-01-30
JP4789394B2 (en) 2011-10-12
US20020066318A1 (en) 2002-06-06
US6684701B2 (en) 2004-02-03
KR20030015389A (en) 2003-02-20
NO20030183D0 (en) 2003-01-14
EP1301778A2 (en) 2003-04-16
CA2411628A1 (en) 2002-01-24

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