A Fast Shape Inversion Method of Flaws in Materials for Infrastructures
The Born inverse scattering method is applied to the shape reconstruction of flaws in the concrete materials. To accelerate the inversion process, the algorithm of the fast Fourier transform is introduced in the integration process of the scattering amplitude. The concrete specimens with flaw models are prepared and the scattered waveforms from flaws are acquired in the pulse-echo mode. The shape of flaws is reconstructed by using the measured waveforms and the performance of the inversion method is demonstrated experimentally.
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
M. Kitahara et al., "A Fast Shape Inversion Method of Flaws in Materials for Infrastructures", Key Engineering Materials, Vols. 261-263, pp. 981-986, 2004