公开(公告)号：US20080159619A1

公开(公告)日：2008-07-03

申请号：US11617859

申请日：2006-12-29

申请人： Ui Won SUH ,  Gigi Olive GAMBRELL ,  William Stewart MCKNIGHT ,  Preeti PISUPATI ,  Peyush Kumar MISHRA ,  Sandeep Kumar DEWANGAN ,  Changting WANG

发明人： Ui Won SUH ,  Gigi Olive GAMBRELL ,  William Stewart MCKNIGHT ,  Preeti PISUPATI ,  Peyush Kumar MISHRA ,  Sandeep Kumar DEWANGAN ,  Changting WANG

IPC分类号： G06K9/00

CPC分类号： G01N27/9046 ,  G01N27/902 ,  G06K9/4604

摘要： A method for detecting small cracks and other anomalies on parts having complex geometries is disclosed. The method includes eddy current inspection incorporating collection of data from multi-frequency eddy current signals. Phase analysis is used to combine the multi-frequency data to enhance the signal to noise ratio of the raw inspection image. The image is then reprocessed using a spatiotemporal filter to correlate with the frequency components of the eddy current flaw signal to separate signals associated with cracks and other flaws at edges that would ordinarily be hidden by edge effect signals.

摘要翻译： 公开了一种用于检测具有复杂几何形状的部件上的小裂纹和其他异常的方法。 该方法包括涡流检测，包括从多频涡流信号中收集的数据。 相位分析用于组合多频数据，增强原始检查图像的信噪比。 然后使用时空滤波器对图像进行再处理，以与涡流缺陷信号的频率分量相关联，以分离与通常由边缘效应信号隐藏的边缘处的裂纹和其他缺陷相关的信号。