Measuring and testing – Specific gravity or density of liquid or solid
Patent
1998-10-21
2000-07-04
Chapman, John E.
Measuring and testing
Specific gravity or density of liquid or solid
73 103, 73 183, G01N 924, G01N 2902
Patent
active
060821817
ABSTRACT:
The present invention is an ultrasonic liquid densitometer that uses a material wedge having two sections, one with a liquid/wedge interface and another with a gas/wedge interface. It is preferred that the wedge have an acoustic impedance that is near the acoustic impedance of the liquid, specifically less than a factor of 11 greater than the acoustic impedance of the liquid. Ultrasonic signals are internally reflected within the material wedge. Density of a liquid is determined by immersing the wedge into the liquid and measuring reflections of ultrasound at the liquid/wedge interface and at the gas/wedge interface.
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Sheen et al., "An In-Line Ultrasonic Viscometer," Review of Progress in Quantitative Nondestructive Evaluation, vol. 14a pp. 1151-1158, 1995.
Battelle (Memorial Institute)
Chapman John E.
Zimmerman Paul W.
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