期刊
ULTRASONICS
卷 85, 期 -, 页码 31-38出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultras.2017.12.010
关键词
Ultrasonic; Non-destructive testing; Coded waveforms; Pulse compression; Imaging; Concrete
资金
- EPSRC [EP/K031201/1] Funding Source: UKRI
A pulse compression technique has been developed for the non-destructive testing of concrete samples. Scattering of signals from aggregate has historically been a problem in such measurements. Here, it is shown that a combination of piezocomposite transducers, pulse compression and post processing can lead to good images of a reinforcement bar at a cover depth of 55 mm. This has been achieved using a combination of wide bandwidth operation over the 150-450 kHz range, and processing based on measuring the cumulative energy scattered back to the receiver. Results are presented in the form of images of a 20 mm rebar embedded within a sample containing 10 mm aggregate. (C) 2017 Elsevier B.V. All rights reserved.
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