EDDY CURRENT PROBE AND EDDY CURRENT ARRAY PROBE

摘要

PROBLEM TO BE SOLVED: To provide an eddy current array probe that has improved and more uniform sensitivity to a crack in a radial, axial, or circumferential surface and reduces the variation between channels crossing an array.;SOLUTION: The eddy current array probes (ECAPs) have a reinforced drive coil configuration. In one array, the ECAPs 10 have a plurality of EC channels 12 and drive coils 14. Each drive coil is disposed in each EC channel. The drive coil has different polarization from an adjacent drive coil. One example, for detecting a flaw with a plurality of scans and in an array configuration, comprises at least one substrate 32, some sensing coils 16 and 18 arranged on the substrate, and the drive coil 14 for surrounding all the sensing coils.;COPYRIGHT: (C)2006,JPO&NCIPI