Reconstruction of sub-wavelength fractures and physical properties of masonry media using full-waveform inversion of proximal penetrating radar

摘要: High-frequency, ultra-wideband penetrating radar has the potential to be used as a non-invasive inspection technique for buildings, providing high-resolution images of structures and possible fractures affecting constructions. To test this possibility, numerical laboratory experiments have been conducted using proximal, steppedfrequency continuous-wave systemoperating inzero-offsetmode, spanning 3–8 GHz frequency range. The reconstruction material electrical properties is achieved by resorting full-waveform inverse modeling. Numerical showed that typical electric permittivity conductivity values concrete plaster, it retrieve physical detect less than 1 mm thick. Laboratory were on non-reinforced plaster slabs in different configurations. results good method: (1) provide thorough fracture response model buildings or artworks (2) non-invasively characterize samples terms their electromagnetic properties.