基于分布式超声无损检测方法的零件内部缺陷检测

发布时间：2019-01-18 17:20

【摘要】：超声检测广泛应用于工业检测,比如超声相控阵检测法和超声A扫应用于零件内部缺陷检测。然而,这些方法可以检测出缺陷位置却很难精确地检测缺陷尺寸,缺陷定量成了急需解决并且很有意义的问题。本文提出了一种分布式超声无损检测方法,将超声探头均匀布置在检测表面,每一个超声探头可以同时发射和接收超声信号,通过对接收到的信号进行处理来重构缺陷轮廓。基于分布式超声无损检测方法,重构零件的人造缺陷并建立相应的声学仿真模型。通过多项式拟合法和聚类法分别处理实验和仿真所获得的数据并重构缺陷轮廓。实验结果和仿真结果显示重构的椭圆形缺陷和正方形缺陷具有一定的精度。结果表明分布式超声无损检测方法有潜在的应用价值和理论意义。
[Abstract]:Ultrasonic testing is widely used in industrial detection, such as ultrasonic phased array detection and ultrasonic A-scan in parts internal defect detection. However, these methods can detect the defect position but it is difficult to accurately detect the defect size. In this paper, a distributed ultrasonic nondestructive testing method is proposed. The ultrasonic probe is uniformly arranged on the detection surface. Each ultrasonic probe can transmit and receive the ultrasonic signal at the same time, and the defect profile can be reconstructed by processing the received signal. Based on the distributed ultrasonic nondestructive testing method, the artificial defects of the parts are reconstructed and the corresponding acoustic simulation model is established. The data obtained from experiment and simulation are processed by polynomial fitting method and clustering method, respectively, and the defect profile is reconstructed. Experimental results and simulation results show that the reconstructed elliptical and square defects have a certain accuracy. The results show that the distributed ultrasonic nondestructive testing method has potential application value and theoretical significance.
【作者单位】：武汉理工大学现代汽车零部件技术湖北省重点实验室;汽车零部件技术湖北省协同创新中心;上海汽车变速器有限公司;
【基金】：国家863项目(2013AA040201)
【分类号】：TB553

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