Recognition of Flaw in Different Position of Screw Based on Alternating Magnetic Flux Leakage Inspection

According to the position of flaw in screw, all flaws were sorted into three kinds, and the characteristics of signal were analyzed, the model of flaw-recognition for each kind of flaw was expounded. At last, the model was proved by detecting the flaws in the inflate screw. It realized the flaw recognition of rhizomatic flaw in six-head screw by use of the detecting signal through the experiment on it.