Image generation method for representation of discontinuities in mechanical test pieces for space, air and automobile industries, using ultrasound burst phase thermography, having reduced interference effects

摘要

Ultrasound bursts are coupled to a test object. The injected sound energy causes selective heating of areas within the object corresponding to areas of high mechanical tension or mechanical damage. For each image point the resulting time-dependent temperature field is calculated from phase information, e.g. by a Fourier or wavelet transformation.