G - Physics – 01 – N
Patent
G - Physics
01
N
340/124.6
G01N 21/88 (2006.01)
Patent
CA 1232044
ABSTRACT OF THE DISCLOSURE: A method for the detection of delaminated areas in coated materials or layered composites, which allows free-air operation and can be used to scan portions of bulky materials on the spot. This method which makes it possible to detect very small delaminated areas in a very short time (less than 1 millisecond), with a very high sensitivity and without creation of excessive thermal stress in the inspected material, basically comprises the steps of: focusing pulsed, thermal radiations onto the structure to be inspected to produce a vertical displace- ment of its coating by thermal expansion if a delaminated area is present at the coating-to-substrate interface, and detecting and measuring this vertical displacement if any, by interferometry, preferably laser-beam interferometry. An apparatus for carrying out this method is also disclosed.
468176
Cielo Paolo
Rousset Gerard
National Research Council Of Canada
Robic Robic & Associes/associates
LandOfFree
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