Guided Wave Technique for Corrosion Detection in Reinforced Steel Bars

Guided wave techniques are very promising for damage detection in pipe and plate like structures. Longitudinal guided waves are excited and recorded after transmission for corrosion detection in reinforcing steel bars. Apart from recording the amplitude of the transmitted guided waves or in other words, monitoring the attenuation of guided waves, differential timeof- flight is recorded with high temporal resolution using cross-correlation technique. It is found that corrosion can be detected from the TOF change as well. Feature extraction techniques are used from time-frequency representations.

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