3D Reconstruction and Calculation Methodology of Defect Using Ultrasonic Phased Arrays

In recent years, there has been a rapid development and application in the use of ultrasonic phased arrays for non-destructive examination, it’s a relatively mature technology to detect over the location and general size of defect. For a better visualization and evaluation, a few researchers have done some work on three-dimensional reconstruction of defects. This paper proposed a 3D reconstruction and calculation methodology, which using a linear phased array probe detection system to collect scanning data, combining with image algorithm on MATLAB platform, then realized the 3D reconstruction and calculation of defects. To verify the reliability of the method, we made two contrast test blocks, including different hole defects. The optimal characterization performance of the methodology will be achieved when the reconstruction model can better characterize the actual defect and the volume calculation results are close to the true values. The experimental results shows the reconstructed 3D models are continuous and smooth, which can reflect the types of defects. The calculated values of volumes are close to the true values, whose calculation errors were all less than 10%, and the maximum error was less than 2% after error compensation. Besides, the speed of defect reconstruction is more faster than traditional methods. For three-dimensional reconstruction and quantitative analysis of defect, it has important significance and practical values.