The technology of the pulsed magnetic flux leakage detection has certain sensitivity to detect different depths of surface defects

but for analysis on component of magnetic flux leakage in different directions

it has some limitation. Aiming at this problem

the U-shaped magnetic plate in pulsed magnetic flux leakage（ PMFL） and the hollow rectangle exciting coil in pulsed eddy current（ PEC） detection are put together and put forward a new method of the pulsed magnetic concentration（ PMC）. Based on the simulation and experiment

the analysis is carried out on the ferromagnetic specimen under these two kinds of detection method

namely the PMFL and PMC

and the testing result of the X

Y and Z component of response signal from the defective parts is obtained. The result shows that the PMC testing method has a better inspective effect of the three direction component ferromagnetic material defect detection. while is carried out Furthermore

the PMC has more sensitivity of the 3 D magnetic flux leakage response signal to different depth of surface defects.