【摘 要】
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Background, Motivation and Objective It is very difficult to inspect thick sections of concrete and related material using ultrasound. The problem is mainly scattering from aggregate and other types o
【机 构】
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School of Engineering, University of Warwick, Coventry, United Kingdom
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Background, Motivation and Objective It is very difficult to inspect thick sections of concrete and related material using ultrasound. The problem is mainly scattering from aggregate and other types of inclusions. This often limits the depth of penetration, but also causes a poor signal to noise ration (SNR) to be present in a single-sided inspection. The objective was to develop a system at low frequencies (100- 400 kHz), which had good penetration, but also had a reasonable bandwidth and SNR. This required the correct combination of transducer, excitation waveform and an additional signal processing method in term of defect location could be optimised.
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