Characterization of non-destructive inspection data from composite structure defects

In this paper, the processing and characterization of aircraft defect signal data have been explored and studied. The signal data was collected using the nondestructive ultrasonic inspection technique, Pitch/Catch swept method. Defects of different size and depths were studied and signal processing techniques were used to identify features that provide the most distinction among the defects. The discussion in this paper is only limited to the parts of the classification process that pertain to data collection, pre-processing, and feature extraction.