Marginally dispersive ultrasonic waveguides

Details Marginally dispersive ultrasonic waveguides Marginally dispersive ultrasonic waveguides

1989-07-27

1992-11-03

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

738665, G01N 2904

Patent

active

051598388

ABSTRACT:
Methods and apparatus for ultrasonically measuring selected physical parameters of a test material or structure are achieved by selecting and configuring waveguides for transmitting extensional, longitudinal, shear, Rayleigh and Lamb waves into media in a marginally dispersive manner. Marginally dispersive transmission is defined by specific criteria of velocity and waveguide diameter. Methods and apparatus for acoustically isolating the waveguides to permit leakage are included, as well as a method of extension to flexural mode conversion to launch flexural waves into a medium.

REFERENCES:
patent: 2514080 (1950-07-01), Mason
patent: 3302044 (1967-01-01), Lynnworth et al.
patent: 4261197 (1981-04-01), Mansfield
patent: 4461178 (1984-07-01), Chamuel
patent: 4510812 (1985-04-01), Feng
patent: 4596133 (1986-06-01), Smalling et al.
patent: 4893496 (1990-01-01), Bau et al.
Tu et al., "Dispersion Of Ultrasonic Pulse Velocity In Cylindrical Rods", J. Acoust. Soc. AM., 27, pp. 550-555 (1955).
Kolsky, "Stress Waves In Solids", Propagation In Bounded Elastic Media, p. 59, Eq. 3.60 (1963).
Crecraft, "Launching Ultrasonic Shear Waves Into Solids At Normal Incidence By Pressure Coupling", J. Sound and Vibr., 1(4), pp. 381-387 (Oct. 1964).
Gelles, "Optical-Fiber Ultrasonic Delay Lines", J. Acoust. Soc. of America, 39(6), pp. 1111-1119 (1966).
Day and Smith, "Under-Sodium Viewing", Ultrasonics Symp. Proc., IEEE, pp. 191-194 (1973).
Rogers and Miller, "Ultrasonic Level, Temperature, and Density Sensor", IEEE Trans. Nucl. Sci., NS-29(1), pp. 665-668, Feb. 1982.
Lynnworth and Nguyen, "Theory And Measurement Techniques", NDT Comm., 1, pp. 164-174 (1984).
Green, "An Acoustic Technique For Rapid Temperature Distribution Measurement", J. Acoust. Soc. A., 77(2), 759-763 (Feb. 1985).
Nicholson et al., "Waveguides In Medical Ultrasonics: An Experimental Study Of Mode Propagation", W. N. McDicken & T. Anderson, Ultrasonics, vol. 27, pp. 101-106, (Mar. 1989).
Frederick, "Ultrasonic Measurement of the Elastic Properties of Polycrystalline Materials at High and Low Temperatures", Acoust. Soc. of America, vol. 20, p. 586.
Bell, "The Velocity of Sound in Metals at High Temperatures", Phil. Mag. 2 1113 (1957), pp. 1113-1120.

Affiliated with

Also associated with

Rating

Marginally dispersive ultrasonic waveguides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Marginally dispersive ultrasonic waveguides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Marginally dispersive ultrasonic waveguides will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2043901