CPC G01N 29/14 (2013.01) [G01M 5/0066 (2013.01); G01M 5/0091 (2013.01); G01N 21/8803 (2013.01); G06T 7/0008 (2013.01); H04N 13/246 (2018.05); G01N 2291/0232 (2013.01); G01N 2291/0258 (2013.01); G06T 2207/10012 (2013.01); G06T 2207/30108 (2013.01)] | 10 Claims |
1. A nondestructive method of determining the structural integrity of a specimen as a load is applied to the specimen, the method comprising the steps of:
attaching at least one acoustic emission sensor to the specimen;
applying a contrasting pattern on the surface of the specimen;
aiming a pair of stereoscopic cameras at the contrasting pattern;
passively recording acoustic stress waves propagating in the specimen in an Acoustic Emission (AE) system electronically coupled to the at least one acoustic emission sensor;
time synchronizing cumulative energy calculated from the AE data with information about the load;
triggering operation of the cameras by the AE system;
adaptively recording data generated by operation of the cameras;
measuring deformation in the specimen based on load-induced movement of the contrasting pattern in a Digital Image Correlation (DIC) system, the DIC system being electronically coupled to the cameras; and
correlating stress waves travelling through the specimen measured by the at least one acoustic emission sensor with strain data measured on a surface of the specimen to compute a Mahalanobis distance of the specimen.
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