Jiya, E. A. and Anwar, N. S. N. and Abdullah, M. Z.
(2016)
Detection of Cracks in Concrete Structure Using Microwave Imaging Technique.
International Journal of Microwave Science and Technology, 2016 (319571).
pp. 1-6.
ISSN 1687-5826
Abstract
Cracks in concrete or cement based materials present a great threat to any civil structures; they are very dangerous and have caused a
lot of destruction and damage. Even small cracks that look insignificant can growandmay eventually lead to severe structural failure.
Besides manual inspection that is ineffective and time-consuming, several nondestructive evaluation techniques have been used
for crack detection such as ultrasonic technique, vibration technique, and strain-based technique; however, some of the sensors
used are either too large in size or limited in resolution. A high resolution microwave imaging technique with ultrawideband
signal for crack detection in concrete structures is proposed. A combination of the delay-and-sum beamformer with full-view
mounted antennas constitutes the image reconstruction algorithm. Various anomaly scenarios in cement bricks were simulated
using FDTD, constructed, andmeasured in the lab. The reconstructed images showed a high similarity between the simulation and
the experiment with a resolution of
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