超声检测既可检测金属柱状体工件的内部缺陷，亦可用于工件内部的缺陷重构和类型识别。为分析柱状工件内部缺陷的特征，提出了一种基于超声检测的金属柱状体的三维重构分析方法，采用有限元软件进行模拟，以得到金属柱状体工件内部的截面信号；然后通过B扫描成像对其像素点进行重组；最后利用体绘制技术对缺陷进行三维重构分析。试验结果表明，该方法可达到良好重构与分析金属柱状体工件内部缺陷的效果，允许误差满足要求。

Ultrasonic detection can not only detect the internal defects of metal cylinder workpiece, but also be used for defect reconstruction and type identification. In order to analyze the regularity and characteristics of the internal defects of the cylindrical workpiece, a three-dimensional reconstruction analysis method of the metal cylinder based on ultrasonic detection was proposed in this paper. The finite element software was used to simulate, so as to simulate the cross-section signal of the inside of the metal cylinder. It then its pixels were reassembled by using B-scan imaging. Finally, volume rendering technique was used to reconstruct the defects. The simulation results showed that this method can achieve good results in the reconstruction and analysis of the internal defects of the metal cylinder workpiece, and the allowable errors met the requirements.