Ultrasonic fluid densitometry and densitometer

Details Ultrasonic fluid densitometry and densitometer Ultrasonic fluid densitometry and densitometer

1996-04-05

1998-01-13

Williams, Hezron E.

Measuring and testing

Specific gravity or density of liquid or solid

G01N 900

Patent

active

057081913

ABSTRACT:
The present invention is an ultrasonic fluid densitometer that uses a material wedge having an acoustic impedance that is near the acoustic impedance of the fluid, specifically less than a factor of 11 greater than the acoustic impedance of the fluid. The invention also includes a wedge having at least two transducers for transmitting and receiving ultrasonic signals internally reflected within the material wedge. Density of a fluid is determined by immersing the wedge into the fluid and measuring reflection of ultrasound at the wedge-fluid interface.

REFERENCES:
patent: 4149139 (1979-04-01), Kronk
patent: 4320659 (1982-03-01), Lynnworth et al.
patent: 4571693 (1986-02-01), Birchak et al.
patent: 4821838 (1989-04-01), Chen
patent: 4893496 (1990-01-01), Bau et al.
patent: 4991124 (1991-02-01), Kline
patent: 5365778 (1994-11-01), Sheen et al.
Research and Development Magazine, Oct., 1994, p. 3.
Sheen, et al., "An In-Line Ultrasonic Viscometer," Review of Progress in Quantitative Nondestructive Evaluation, vol. 14a, pp. 1151-1158, 1995.

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