公开(公告)号：US20240027403A1

公开(公告)日：2024-01-25

申请号：US18357142

申请日：2023-07-23

申请人： Sergey Vinogradov ,  Xin Chen ,  Jay Fisher

发明人： Sergey Vinogradov ,  Xin Chen ,  Jay Fisher

IPC分类号： G01N29/24 ,  G01N29/265

CPC分类号： G01N29/2412 ,  G01N29/265 ,  G01N2291/044 ,  G01N2291/0422

摘要： A “partial activation” method of magnetostrictive guided wave testing of a structure. A coil-wrapped magnetostrictive strip is acoustically coupled to the surface of the structure. A permanent magnet is placed over a portion of the strip, such that the permanent magnet covers all or most of the width of the strip but only a portion of its length. A pulsed alternating current source activates the magnetostrictive strip, thereby producing magnetostrictive vibrations in the magnetostrictive strip, and thereby resulting in guided waves in the structure. Response signals are received, then the permanent magnet is moved to a next position along the length of the magnetostrictive strip. As the magnet is moved along the strip, the strip is activated and response signals are received, thereby testing a desired portion of the structure under the strip. The response signals are analyzed to determine the presence of anomalies in the structure.