Methods and systems for detecting data anomalies
AssigneeHoneywell International Inc.
InventorsMichael Dillard, Stephen Whitlow, Umut Orhan
Life of this patent
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Abstract
Methods and systems are provided for monitoring sensors and other data sources and detecting data anomalies. One exemplary method involves determining a probable range for a metric influenced by a behavior a sensor based at least in part on historical data associated with the sensor, identifying an anomalous condition with respect to the sensor based on a relationship between a current value for the metric indicative of a current behavior of the sensor and the probable range, and providing a graphical indication of the anomalous condition on a display device.
Claims20
A method of monitoring a sensor, the method comprising:
- determining, by a processing system, a probable range for a metric influenced by a behavior of the sensor based at least in part on historical data associated with the sensor and a preceding measurement value output by the sensor, wherein the probable range for the metric represents an expected temporal behavior of the sensor;
- determining, by the processing system, a current value for the metric based on a current measurement value output by the sensor;
- identifying, by the processing system, an anomalous condition with respect to the sensor when the sensor is exhibiting an unexpected temporal behavior across successive samples based on a relationship between the current value for the metric indicative of a current behavior of the sensor and the probable range;
- and
- providing a graphical indication of the anomalous condition on a display device.
A method of detecting data anomalies, the method comprising:
- obtaining, by a processing system, a first value for a first output from a first data source onboard an aircraft;
- obtaining, by the processing system, a second value for a second output from a second data source onboard the aircraft;
- determining, by the processing system, a probable range of values representing an expected temporal behavior for the second output based at least in part on the first value and a historical relationship between the first output and the second output wherein the probable range dynamically varies based on the first value;
- detecting, by the processing system, an anomalous condition when the second value is outside the probable range of values;
- and
- initiating a remedial action in response to detecting the anomalous condition.
An aircraft system comprising:
- a sensor onboard an aircraft to output a first measurement value indicative of a characteristic sensed by the sensor;
- a data source onboard the aircraft to output a second value;
- a data storage element maintaining historical data indicative of a historical relationship between the sensor and the data source;
- a display device onboard the aircraft;
- and
- a processing system coupled to the sensor, the data source, the data storage element, and the display device to determine an expected temporal behavior for the sensor based at least in part on the second value and the historical relationship between the sensor and the data source, wherein the expected temporal behavior comprises a probabilistic relationship between the sensor and the data source that dynamically varies based on the second value, identify an anomalous condition in response to a discrepancy between the first measurement value and the expected temporal behavior, and provide graphical indication of the anomalous condition on the display device.
Dependencies are inferred from the claim text.