非破壊検査におけるPhase coherence imagingの映像化性能に関する基礎検討

抄録

Phase coherence imaging (PCI) methods have been proposed in ultrasonic nondestructive testing. Generally, phase coherence values are superposed over the amplitude calculated by a delay and sum (DAS) method. In this study, only the phase coherence value was used to investigate the performance of the PCI method. We adopted two-dimensional numerical simulations using the elastodynamic finite integration technique to simulate the scattered wave from defects. Then, the waveforms were fed into the PCI, and the characteristics of the imaging were compared to the conventional DAS method.