Apparatus and method for improving liquid gaging system using error compensation data
First Claim
1. Apparatus for improving the accuracy of art operational fuel gaging system previously installed on an airplane of the type having a number of fuel level sensors that each produce an output signal that can be combined to determine fuel volume within a first tolerance range, the apparatus comprising:
- control means for receiving the sensor signals and calculating a first volume value; and
an attitude indicator connected to the control means and that produces signals corresponding to the attitude of the fuel level relative to the sensors;
said control means comprising memory means for storing volume measurement compensation data based on predetermined volume measurement errors that are a function of attitude and fuel volume;
said control means compensating said first volume value with selected said compensation data based on said attitude signals to produce a second fuel volume value that is more accurate than said uncompensated first volume value.
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Abstract
Apparatus for improving the accuracy of a fuel gaging system already installed on an airplane of the type having a number of fuel level sensors that each produce an output signal that can be combined to determine fuel volume. The apparatus includes control means for energizing the sensors, receiving the sensor signals and calculating a first volume value. An attitude indicator may be provided that is connected to the control means and that produces signals corresponding to the attitude of the fuel level relative to the sensors; the control means includes memory means for storing volume measurement compensation data based on predetermined volume measurement errors that are a function of fuel volume, and attitude when the attitude indicator is used; the control means compensating the first volume value to produce a second fuel volume value that is more accurate than the uncompensated first volume value.
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Citations
9 Claims
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1. Apparatus for improving the accuracy of art operational fuel gaging system previously installed on an airplane of the type having a number of fuel level sensors that each produce an output signal that can be combined to determine fuel volume within a first tolerance range, the apparatus comprising:
- control means for receiving the sensor signals and calculating a first volume value; and
an attitude indicator connected to the control means and that produces signals corresponding to the attitude of the fuel level relative to the sensors;
said control means comprising memory means for storing volume measurement compensation data based on predetermined volume measurement errors that are a function of attitude and fuel volume;
said control means compensating said first volume value with selected said compensation data based on said attitude signals to produce a second fuel volume value that is more accurate than said uncompensated first volume value. - View Dependent Claims (2, 3, 4, 5, 6)
- control means for receiving the sensor signals and calculating a first volume value; and
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7. A method for improving the accuracy of an operational fuel gaging apparatus previously installed on art airplane of the type having a plurality of fuel level sensors that each produces an output signal that corresponds to the fuel level at the sensor, which output signals can be combined to determine fuel volume accurate to within a first tolerance range, the method comprising the steps of:
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receiving the output signals from the, sensors; calculating a first volume measurement value based on said sensors output signals; detecting attitude of the fuel level relative to said sensors; storing, for a corresponding plurality of predetermined attitudes, a plurality of predetermined volume compensation data values based on repeatable errors in the volume measurement values that are a function of the fuel volume; and compensating said first volume value with said compensation data value selected for the detected attitude to derive a second volume value accurate within a second tolerance range that is more accurate that the first tolerance range. - View Dependent Claims (8, 9)
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Specification