Measuring and testing – Volumetric content measuring
Reexamination Certificate
2006-10-03
2006-10-03
Noland, Thomas P. (Department: 2605)
Measuring and testing
Volumetric content measuring
C073S29000R
Reexamination Certificate
active
07114384
ABSTRACT:
An adiabatic liquid volume sensor system is described, which employs a main chamber in a back-to-back configuration with a reference chamber of known volume. The system measures liquid volume in the main chamber by making low frequency acoustic measurements of the acoustic pressure differences in the two closed chambers when driven with a sinusoidal frequency from the same speaker. Pressure transducers in each chamber measure acoustic adiabatic pressures in each chamber. The ratio of these pressures multiplied by the known volume of the reference chamber yields the volume of gas in the main chamber. The volume of liquid is equal to the known volume of the main chamber minus the calculated gas volume.
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Bates Kenn S.
Chang David B.
Kunz Kenneth M.
Rowlett Barton H.
Denson-Low W. K.
Grunebach Georgann S.
Gudmestad Terje
Hughes Aircraft Company
Noland Thomas P.
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