Multi-channel ultrasonic signal processing for non-destructive inspection

In this paper, an image construction algorithm was applied to detect the defects within the experimental aluminum block in the field of non-destructive inspection, which was always called total focusing method. Before applying this kind of TFM, an advanced data acquisition method whose name was full matrix capture was implemented to get time domain ultrasonic signal set. Besides, some preprocessing techniques was carried out before using TFM, such as Fourier Transform and Hilbert Transform. Finally, various kinds of results with different preprocessing methods were demonstrated at the end of this paper.