| Popis: |
This paper introduces different data analysis strategies and characterization metrics for (1) designing and optimizing NDE characterization techniques, (2) validating NDE characterization performance and (3) ensuring in-service quality control. Rather than discard data that lack perfect knowledge of the flaw state, it is proposed to use it appropriately in order to optimize the inversion process. For example, such cracks of uncertain depth can be repeatedly scanned at different orientations and with different probe, and the inversion process can be designed to minimize the variance in the depth estimates under the varying conditions. To address validation of NDE characterization capability, the use of a finite number of real cracks that are destructively characterized in conjunction with a broader notch specimen set and simulated data is proposed. Lastly, inversion metrics are reviewed when no prior knowledge of the crack state is available. |
