Eddy current array probes with enhanced drive fields

摘要

Several eddy current array probes (ECAP) with enhanced drive coil configurations are described. In one arrangement, an ECAP (10) includes a number of EC channels (12) and a number of drive coils (14). Each of the drive coils is provided for a respective one of the EC channels. The drive coils have alternating polarity with respect to neighboring drive coils. In another arrangement, an ECAP (40) for detecting flaws in a number of scanning and orientation configurations includes at least one substrate (32), a number of sense coils (16, 18) arranged on the substrate(s), and a drive coil (14) encompassing all of the sense coils. In another arrangement, an ECAP includes a substrate sense coils arranged in at least two rows, and at least one drive line. One drive line is provided for each pair of rows and disposed between the rows.