Measuring and testing – Vibration – By mechanical waves
Patent
1997-03-28
1999-09-21
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73602, 73620, G01N 2918
Patent
active
059556714
ABSTRACT:
A method and apparatus are provided for simultaneously measuring the anisotropic orientation and the thickness of an article. The apparatus comprises a transducer assembly which propagates longitudinal and transverse waves through the article and which receives reflections of the waves. A processor is provided to measure respective transit times of the longitudinal and shear waves propagated through the article and to calculate respective predicted transit times of the longitudinal and shear waves based on an estimated thickness, an estimated anisotropic orientation, and an elasticity of the article. The processor adjusts the estimated thickness and the estimated anisotropic orientation to reduce the difference between the measured transit times and the respective predicted transit times of the longitudinal and shear waves.
REFERENCES:
patent: 4106327 (1978-08-01), Adler et al.
patent: 4893510 (1990-01-01), Ichikawa et al.
patent: 5209123 (1993-05-01), Prosser et al.
patent: 5337610 (1994-08-01), Prosser et al.
patent: 5408882 (1995-04-01), Mckinley et al.
"Ultrasonic Orientation Determination of Single Crystals" by R.E. Green, Jr., & G. Henneke, II, Dept. of Mechanics, The Johns Hopkins University, Baltimore, Maryland, vol. 41, No.1 (1967) pp. 84-90.
"Crystal Acoustics" by M.J.P. Musgrave-Reader in Applied Mathematics, Imperial College, London, Chapter 6(pp. 66-82) and Chapter 7 (pp. 83-93) (1970).
"Theory of Elastic Waves in Crystals" by Fedor I. Fedorov, Belorrusian State Univeresity, Minsk, Chapter 4(pp.119-167) and Chapter 7 (pp. 245-282) (1968).
"Ultrasonic Investigation of Mechanical Properties", by Robert E. Green, Jr., Treatise on Materials Science and Technology, vol. 3 Chapter I (pp. 1-2) and Chapter II (pp.3-72) (1973).
"Stress Waves in Solids" by H. Kolsky, Chapter IV (pp.95-98) and Chapter VI (pp. 130-162) (1953).
"Nondestructive Characterization of Composite Media" by Ronald A. Kline, Chapters 1-10 (pp. 1-175) (1992).
"Ultrasonic Double Refraction in Worked Metals"by Paul F. Sullivan and Emmanuel P. Papadakis, The Journal of the Acoustical Society of America, vol. 33, No.11, Nov. 1961 (1622-1624).
"Calculation of Elastic Anisotropy in Rolled Sheet" by G.A. Alers and Y.C. Liu, Transactions of the Metallurgical Society of AIME, vol. 236, Apr. 1966, (pp.482-489).
"Texture of Polycrystalline Metals Characterized by Ultrasonic Velocity Measurements" by M. Hirao, K. Aoki, and H. Fukuoka, H. Acoust. Soc. Am., vol. 81, No. 5, May 1987 (pp. 1434-1440).
"Relations Between Elastic Constants C.sub.ij and Texture Parameters for Hexagonal Materials"by Yan Li and R. Bruce Thompson, J. Appl. Phys., vol. 67, No. 5, Mar. 1990, (pp. 2663-2665).
"A Method for the Solution of Certain Non-Linear Problems in Least Squares"by Kenneth Levenberg, 2 Quarterly of Appl. Math. (pp. 164-168) 1944.
"An Algorithm for Least-Squares Estimation of Nonlinear Parameters" by Donald W. Marquardt, J. Soc. Indust. Appl. Math., vol. 11, No. 2, Jun. 1963, (pp. 431-441).
"Industrial Ultrasonic Imaging and Microscopy" by R.S. Gilmore, 29 J. Phys. D: Appl. Phys. (1996) (pp. 1389-1417).
"Simultaneous Measurement of the Acoustical Properties of a Thin-Layered Medium: The Inverse Problem" by V.K. Kinra, P.T. Jaminet, C. Zhu, and V.R. Iyer, J. Acoust. Soc. Am., vol. 95 No. 6. Jun. 1994 (pp. 3059-3074).
IMSL, Inc., FORTRAN Subroutines for Mathematical Applications User's Manual, 8.1.3(pp. 1023-1029) (1991).
Deaton, Jr. John Broddus
Gilmore Robert Snee
Kline Ronald Alan
General Electric Company
Johnson Noreen C.
Maddry Tyler
Miller Rose M.
Williams Hezron E.
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