LIQUID LEVEL SENSING AND DIAGNOSTIC DETERMINATION

• Main Author: Larsen, John F
• Format: Patent
• Language: English
• Published: 08.11.2018
• Subjects: CALCULATING; COMPUTING; CONTROLLING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR; TESTING

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.