Measurement, compensation and control of equivalent shear...

Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Viscosity

Reexamination Certificate

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C073S054010, C073S054240

Reexamination Certificate

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11313029

ABSTRACT:
A method for controlling the shear rate at which an acoustic wave device measures viscosity by calculating the shear rate as a function of the characteristic rate of quartz movement in response to a given input transducer power level and the viscosity of the fluid and then by adjusting the input transducer power level to obtain the desired shear rate for the viscosity measurement by optimizing the power level. Related aspects of the invention provide for methods for characterizing viscoelastic fluids at a plurality of predetermined shear rates using a plurality of optimized power levels, a plurality of sensor designs, or a plurality of both optimized power levels and sensor designs.

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patent: 2002/0124634 (2002-09-01), Litton
patent: 2005/0132784 (2005-06-01), Andle

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