Electromagnetically induced acoustic emission (EMAE) is a new method for nondestructive testing based on acoustic emission. It did nondestructive detection with the effect of dynamic electromagnetic loading to generate a stress field stimulating stress waves from the defects. This thesis mainly focuses on the application of the EMAE in the nonmagnetic metal plate crack detection. It adopts the study methods of combining theory with practice. It deeply analyses the EMAE signal and builds a recognition system...