Abstract:
Barker coded independent component thermography (BCICT)
approach known for exploiting the pulse compression properties with
independent component analysis method was used to examine a mild
steel sample with drilled flat-bottomed holes at various depths. This
Letter emphasises the application of the probability of detection
(POD) as a predictive assessment tool for the efficacy of the different
methods to detect the defects at varying depths. The results exhibited
that the aspect ratio of the deep defect r90 with 90% POD and r90/95
for 90% POD with 95% confidence that can be detected using the
BCICT approach are 3.161 and 3.835, respectively. Besides, a relation
between the POD of the defect at different depths as a feature of the
defect aspect ratio (diameter/depth) has also been presented
