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

Applied Sciences

JohnS. Popovics¹  Homin Song² 

[1] Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;Nuclear Science and Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA;

关键词: air-coupled;    concrete;    cracking;    damage visualization;    MEMS ultrasonic microphone array;    surface waves;    ultrasonic wavefield imaging;   

DOI  :  10.3390/app9153005

来源: DOAJ

【 摘 要 】

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 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.

【 授权许可】

Unknown