Contactless Ultrasonic Wavefield Imaging to Visualize Near-Surface Damage in Concrete Elements

Homin Song, John S. Popovics
2019 Applied Sciences  
We present work to detect and visualize near-surface damage in concrete using contactless ultrasonic wavefield imaging technology. A fully contactless ultrasonic scanning system that utilizes a micro-electro-mechanical systems (MEMS) ultrasonic microphone array is used to collect ultrasonic surface wave data from a concrete sample. The obtained wavefield data sets are processed with a frequency-wavenumber (f-k) domain wavefield filtering approach to extract non-propagating oscillatory fields
more » ... cillatory fields set up by near-surface concrete cracking damage. The experimental results demonstrate that near-surface concrete damage can be detected and visualized using the proposed ultrasonic wavefield imaging approach.
doi:10.3390/app9153005 fatcat:ktj3752vrvcytb4rv7n5btvfce