Data processing: measuring – calibrating – or testing – Calibration or correction system – Fluid or fluid flow measurement
Reexamination Certificate
2008-04-08
2008-04-08
Barbee, Manuel L. (Department: 2857)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Fluid or fluid flow measurement
C702S050000, C073S001730, C073S291000, C700S281000, C700S282000
Reexamination Certificate
active
11029072
ABSTRACT:
Systems and methods are provided for estimating the height of a fluid contained in a mixing tank. A dynamic control device which operates as an external observer is used for controlling and monitoring the estimation. This estimate of the height is then compared to the measured fluid height in the mixing tank to obtain an estimation of the height error. The mixing tank has one or more input volumetric rates which are known along with the output volumetric rates. This height error is used to drive the estimation to the nominal height of the mixing tank through the use of a Proportional Integral PI type controller. By setting the PI gains, the noise and oscillations of the mixing tank can be removed from the height estimation while tracking the nominal value of the height. The methods and the systems can also be implemented for estimating the volume or quantity of fluid contained in a mixing tank. The methods and systems can also be implemented for a series of two mixing tanks divided in series where the fluid flows from the first tank to the second tank.
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Borgstadt Justin
Dykstra Jason
Baker & Botts L.L.P.
Barbee Manuel L.
Wustenberg John W.
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