Ultrasonic Guided Wave Imaging Techniques in Structural Health Monitoring

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Delamination detection in composites through guided wave field image processing (2011, background): “Note that the wavefield imaging discussed above is different from the traditional phased array ultrasonic imaging technique in which time-of-flight or wave attenuation information is used to image all reflectors in the ultrasonic medium [19,20].”
Guided wave based structural health monitoring: A review (2016, methodology): “These two imaging techniques have been compared by Yan et al [164].”
Ultrasonic Lamb wave tomography in structural health monitoring (2011, background): “Recently Yan et al [22] used phase array imaging to inspect the region outside the array.”
Automated detection of delamination and disbond from wavefield images obtained using a scanning laser vibrometer (2011, unknown): “Note that the wavefield imaging discussed above is different from the traditional phased array ultrasonic imaging techniques in which time-of-flight or wave attenuation information is used to image all reflectors in the ultrasonic medium [20, 21].”
Multi-damage localization on large complex structures through an extended delay-and-sum based method (2016, methodology): “result in an interpretable and intuitive image to reflect the location of damage.(18) Some representative algorithms are phase arrays approach,(19) tomography technique,(20) probability-based diagnostic imaging (PDI) method,(21,22) and delay-and-sum algorithm.”