The eddy current flaw detection probe which consists of the detection coil which detects

摘要

PROBLEM TO BE SOLVED: To detect injuries in two directions crossing each other at a right angle of an inspection object by one detection coil in an eddy current flaw detecting probe.;SOLUTION: An exciting coil E generates a uniform eddy current in the winding direction of the exciting coil E in the inspection object T being a magnetic material to generate a uniform magnetic flux in the direction vertical to the coil surface of the exciting coil E. When there is an injury in the inspection object T in the direction vertical to the coil surface of the exciting coil E, an eddy current is disturbed at the part of the injury to change. Further, when there is an injury in the direction parallel to the winding direction of the exciting coil E, a leaked magnetic flux is generated in the part of the injury. A detection coil D detects a change of an eddy current or the leaked magnetic flux to detect the injury. That is, since detection coil D detects both of the change of the eddy current and the leaked magnetic flux caused by the inury, the injuries in two directions crossing each other at a right angle can be detected.;COPYRIGHT: (C)2004,JPO&NCIPI