A Review of Signal Processing Techniques for Ultrasonic Guided Wave Testing

Ultrasonic guided wave testing (UGWT) is a non-destructive (NDT) technique commonly used in structural health monitoring to perform wide-range inspection from single point, thus reducing the time and effort required for NDT. However, multi-modal dispersive nature of waves makes extraction essential information that leads defect detection an extremely challenging task. The purpose this article give overview signal processing techniques filtering signals, isolating modes identifying localising defects UGWT. are summarised grouped according geometry studied structures. Although reviewed have led satisfactory results, identification through remains with space improvement, particularly by combining integrating machine learning algorithms.