Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2008-04-08
2008-04-08
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
Reexamination Certificate
active
07353709
ABSTRACT:
A method and system is disclosed for determining a property of an object by measuring ultrasonic attenuation. With the proposed method, a measured ultrasonic interaction signal of the object is compared with a reference signal produced using the same generation and detection setup, but using a reference part. The reference ultrasonic signal has low attenuation, and exhibits equivalent diffraction properties as the object, with respect to a broadband ultrasonic pulse. The difference is attributable to the attenuation of the object. The attenuation as a function of frequency, the attenuation spectrum, is fitted to a model to obtain a parameter useful for identifying one of the many properties of an object that varies with ultrasonic attenuation.
REFERENCES:
patent: 4026157 (1977-05-01), Goebbels
patent: 4539848 (1985-09-01), Takafuji et al.
patent: 4597292 (1986-07-01), Fujii et al.
patent: 4646748 (1987-03-01), Fujii et al.
patent: 4941474 (1990-07-01), Pratt, Jr.
patent: 5121629 (1992-06-01), Alba
patent: 5394732 (1995-03-01), Johnson et al.
patent: 6109098 (2000-08-01), Dukhin et al.
patent: 6119510 (2000-09-01), Carasso et al.
patent: 6370956 (2002-04-01), Bewlay et al.
patent: 6532821 (2003-03-01), Lamouche et al.
patent: 6672163 (2004-01-01), Han et al.
patent: 6684701 (2004-02-01), Dubois et al.
patent: 7086285 (2006-08-01), Reed
patent: 2004/0060356 (2004-04-01), Scott
patent: 0064399 (1982-10-01), None
patent: 06-188194 (1994-04-01), None
“Characterization of Cast Irons By Leaky Rayleigh Surface Acoustic Waves”, Proc. Of the 2ndInternational conference on Emerging Technologies in NDT, Athens, Greece, May 24-26, 1999, eds Van Hemelrijck, Anastassopoulos & Philippidis, Rotterdam (2000).
P. He and J. Zheng, “Acoustic Dispersion and Attenuation Measurement using Both Transmitted and Reflected Pulses”, Ultrasonics 39, pp. 27-32, 2001.
E. P. Papadakis, K.A. Flowler and L.C. Lynnworth, “Ultrasonic Attenuation By Spectrum Analysis of Pulses in Buffer Roads: Method And Diffraction Corrections”, J. Acoust. Soc. Am. 53, pp. 1336-1343, 1973.
P. Wu and T. Stepinski, “Quantitative Estimation of Ultrasonic Attenuation in a Solid in the Immersion Case With Correction of Diffraction Effects”, Ultrasonics 38, pp. 481-485, 2000.
H. Ogi, M. Hirjoa, T. Honda, “Ultrasonic Diffraction From a Transducer With Arbitrary Geometry and Strength Distribution”, J. Acoust. Soc. Am. 98, pp. 1191-1198, 1995.
J.-P. Monchalin and J.-D. Aussel, “Ultrasonic Velocity and Attenuation Determination By Laser-Ultrasonics”, J. Nondestr. Eval. 9, pp. 211-221, 1990.
B.F. Pouet and N.J.P. Rasolofosaon, “Measurement of Broadband Intrinsic Ultrasonic Attenuation and Dispersion in Solids With Laser Techniques”, J. Acoust. Soc. Am. 93, pp. 1286-1292, 1993.
H. Jeong and D.K. Hsu, “Experimental Analysis of Porosity-Induced Ultrasonic Attenuation and Velocity Change in Carbon Composites”, Ultrasonics 33, pp. 195-203, 1995.
D.K. Hsu and S.M. Nair, “Evaluation of Porosity in Graphite-Epoxy Composite by Frequency Dependence of Ultrasonic Attenuation”,Review of Progress in Quantitative Nondestructive Evaluationvol. 6B, ed. By D.O. Thompson and D.E. Chimenti, Plenum Press, New York, pp. 1185-1192, 1987.
M. S. Hugues, S.M. Handley, J.G. Miller and E.I. Madaras, “A Relationship Between Frequency Dependent Ultrasonic Attenuation and Porosity in Composite Laminates”,Reviw of Progress in Quantitative Nondestructive Evaluationvol. 7B, ed. By D.O. Thompson and D.E.Chimenti, Plenum Press, New York, pp. 1037-1044, 1988.
Kruger Silvio E.
Lamouche Guy
Levesque Daniel
Monchalin Jean-Pierre
Anderson J. Wayne
Koenig Hans
Miller Rose M
National Research Council of Canada
Williams Hezron
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