Research on the Fusion Mechanism of Pulsed Electromagnetic for Defect Detection
PAN Meng
ZHOU Deqiang
CHANG Xiang
Abstract：Aimed at the problem that the defects of surface and subsurface are very hard to detect on the ferromagnetic components,the pulsed electromagnetic testing model is established.The physical mecha-nism of a method composed of the pulsed magnetic flux leakage(PM FL)and pulsed magnetic reluctance (PM R)under the surface and subsurface defect is revealed.Both the simulation and experimental results indicate that the magnetic flux leakage exists in the surface defect of ferromagnetic,but the subsurface de-fect detecting signal is the change of the pulsed magnetic resistance.For the different depth of the surface defects,the pulse leakage magnetic response signal picked by GM R sensor is better linearity and higher sensitivity;For the different subsurface defects of ferromagnetic components,the relationship between the characteristic value of the pulse magneto-resistance response and the depth of the defects is similar to the linear grow th relationship,and the discrimination degree is larger and the detection performance is better.
Keywords：pulsed electromagnetic testingpulsed magnetic flux leakagepulsed magnetic reluctancedefect
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 85-90 )