Adaptive baseline damage detection system and method
AssigneeHoneywell International Inc.
InventorsCenek Sandera, Radek Hedl
Life of this patent
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Abstract
A system and method for detecting damage growth in a structure includes sensing, with a sensor that is coupled to the structure, a physical quantity reflecting damage growth, to thereby generate and supply a sensor signal. Features are extracted from the sensor signal to thereby generate a current feature vector. The current feature vector is assigned to either a previously created cluster or to a new cluster. A stability measure is calculated based on clusters to which the current feature vector and a predetermined number of previous feature vectors are assigned. An alarm is selectively generated based on the calculated stability measure.
Claims19
A method of detecting damage growth in a structure, comprising the steps of:
- sensing, with a sensor that is coupled to the structure, a physical quantity reflecting damage growth, to thereby generate and supply a sensor signal;
- extracting a plurality of features from the sensor signal to thereby generate a current feature vector;
- assigning the current feature vector to either a previously created cluster or to a new cluster;
- calculating a stability measure based on clusters to which the current feature vector and a predetermined number of previous feature vectors are assigned;
- and
- selectively generating an alarm based on the calculated stability measure.
A structural health monitoring system for detecting damage growth in a structure, comprising:
- a transducer configured to transmit ultrasonic waves into the structure, and to sense the transmitted ultrasonic waves to thereby generate and supply a sensor signal;
- and
- a processor in operable communication with the transducer and coupled to receive the sensor signal therefrom, the processor configured, upon receipt of the sensor signal to:
- extract a plurality of features from the sensor signal to thereby generate a current feature vector,
- assign the current feature vector to either a previously created cluster or to a new cluster,
- calculate a stability measure based on clusters to which the current feature vector and a predetermined number of previous feature vectors are assigne, and
- selectively generate an alarm signal based on the calculated stability measure.
A structural health monitoring system for detecting damage growth in a structure, comprising:
- a plurality of transducers configured to transmit ultrasonic waves into the structure, and to sense the transmitted ultrasonic waves to thereby generate and supply sensor signals;
- and
- a processor in operable communication with the transducers and coupled to receive the sensor signals therefrom, the processor configured, upon receipt of the sensor signals to:
- extract a plurality of features from each sensor signal to thereby generate a current feature vector for each sensor signal,
- assign each of the current feature vectors to either a previously created cluster or to a new cluster,
- calculate a stability measure based on clusters to which the current feature vectors and a predetermined number of previous feature vectors are assigned, and
- selectively generate an alarm signal based on the calculated stability measure.
Dependencies are inferred from the claim text.