Frequency spectrum apparatus for determining mechanical properti

Details Frequency spectrum apparatus for determining mechanical properti Frequency spectrum apparatus for determining mechanical properti

1992-08-11

1995-06-27

Noland, Tom

Measuring and testing

Vibration

By mechanical waves

73597, 12866002, 12866001, A61B 800

Patent

active

054269792

ABSTRACT:
Apparatus for determining, through an interposed medium, the mechanical properties of a solid comprised of more than one material, the solid having a surface. The apparatus includes a) ultrasonic transmission apparatus located in a first location for transmitting ultrasonic waves through the interposed medium and through the solid and generally parallel to the surface, b) at least one ultrasonic receiver unit located in each of second and third locations for receiving the ultrasonic waves, wherein the first, second and third locations are colinear along the surface, c) apparatus for locating the at least one receiver unit such that a first receipt time of an ultrasonic wave from the surface to the at least one ultrasonic receiver unit at the second location is generally equivalent to a second receipt time from the surface to the at least one ultrasonic receiver unit at the third location, d) apparatus for receiving a time-based output signal from each of the at least one ultrasonic receiver unit, e) apparatus for transforming at least two of the output, signals to the frequency domain thereby to produce frequency domain signals and f) apparatus for determining, from the frequency domain signals, frequency values and their corresponding propagation speeds, for each of the materials within the solid.

REFERENCES:
patent: 3127950 (1964-04-01), Itria
patent: 3228232 (1966-01-01), Proctor
patent: 3288241 (1966-11-01), Bancroft et al.
patent: 3372163 (1968-03-01), Tessandori
patent: 3512400 (1970-05-01), Lynnworth
patent: 3676584 (1972-07-01), Plaskas et al.
patent: 3720098 (1973-03-01), Dixon
patent: 3847141 (1974-11-01), Hoop
patent: 4361154 (1982-11-01), Pratt, Jr.
patent: 4372163 (1983-02-01), Tittmann et al.
patent: 4398421 (1983-08-01), White
patent: 4413517 (1983-11-01), Soden
patent: 4421119 (1983-12-01), Pratt, Jr.
patent: 4566459 (1986-01-01), Umemura et al.
patent: 4597292 (1986-05-01), Fujii et al.
patent: 4640132 (1987-02-01), Flora et al.
patent: 4752917 (1988-06-01), Dechape
patent: 4774959 (1988-10-01), Palmer et al.
patent: 4896278 (1990-01-01), Grove
patent: 4913157 (1990-04-01), Pratt, Jr. et al.
patent: 4926870 (1990-05-01), Brandenburger
patent: 4930511 (1990-05-01), Rossman et al.
patent: 4941474 (1990-05-01), Pratt, Jr.
patent: 4947851 (1990-08-01), Sarvazyan et al.
patent: 4976267 (1990-12-01), Jeffcott et al.
patent: 4982339 (1991-01-01), Insana et al.
patent: 4993416 (1991-02-01), Ophir
patent: 5029475 (1991-07-01), Kikuchi et al.
patent: 5038615 (1991-08-01), Trulson et al.
patent: 5038787 (1991-08-01), Antirch et al.
patent: 5042489 (1991-08-01), Wiener et al.
patent: 5143069 (1992-09-01), Kwon et al.
T. Nomura et al, "Precise Measurement of Surface Acoustic Wave Velocity Using a Swept Frequency IDT-NDE System", Japanese J. of Applied Physics, Supplements, vol. 27-1, pp. 160-162 (1988).
"Inspection, Processing and Manufacturing Control of Metal by Ultrasonic Methods", Symposium on Ultrasonic Testing, by C. H. Hastings and S. W. Carter, 52nd Annual Meeting of the American Society for Testing Materials, Jun. 28, 1949, pp. 16-47.
Wave Motion in Elastic Solids, by Karl F. Graff, published by the Clarendon Press, Oxford, England in 1975, p. 326.
"Osteoporotic Bone Fragility: Detection by Ultrasound Transmission Velocity," R. P. Heaney et al.; JAMA, vol. 261, No. 20, May 26, 1989, pp. 2986-2990.
"Measurement of Velocity of Ultrasound in Human Cortical Bone In Vivo," M. A. Greenfield, et al., Radiology, vol. 138, Mar. 1981 pp. 701-710.
"Combined 2.25 MHz ultrasound velocity and bone mineral density measurements in the equine metacarpus and their in vivi applications" R. N. McCartney and L. B. Jeffcott, Medical and Biological Engineering and Computation, vol. 25, 1987, Nov. 1877, pp. 620-626.

Affiliated with

Also associated with

Rating

Frequency spectrum apparatus for determining mechanical properti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency spectrum apparatus for determining mechanical properti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency spectrum apparatus for determining mechanical properti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-280708