Liquid level sensing and diagnostic determination
AssigneeGM Global Technology Operations LLC
InventorJohn F. Larsen
Life of this patent
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Abstract
A method for determining a liquid level of a reservoir includes sensing a plurality of liquid level points during a plurality of defined computation intervals, and determining filtered block points from the sensed liquid level points occurring during each of the computation intervals. The method fits a regression model to the determined filtered block points, including determining a slope and a standard error of regression, and determines an actual liquid level change from the slope of the regression model. The method may also include making a diagnostic determination if the method determines that a confidence ratio is sufficiently high.
Claims16
A method for determining a liquid level change of a reservoir subject to disturbances, the method comprising:
- sensing a plurality of liquid level points during a plurality of defined computation intervals;
- determining a plurality of filtered block points from the sensed liquid level points occurring during each of the computation intervals;
- fitting a regression model to the determined filtered block points, including determining a slope and a standard error of regression;
- and
- determining an actual liquid level change from the slope of the regression model.
A method for determining a liquid level of a reservoir subject to disturbances, the method comprising:
- sensing a plurality of liquid level points during a plurality of defined computation intervals;
- determining a plurality of filtered block points from the sensed liquid level points occurring during each of the computation intervals;
- fitting a regression model to the determined filtered block points, including determining a slope and a standard error of regression;
- and
- determining an actual liquid level from the slope of the regression model.
Dependencies are inferred from the claim text.