| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an eddy current test method and device of a metal band capable of separating material noise near a welded section from a scab defect. <P>SOLUTION: The eddy current test device compares interval data with a material noise determination threshold set at a level lower than a defect determination threshold, and counts channel numbers of data exceeding the material noise determination threshold. When the count number is more than the material noise determination channel number set beforehand, the device determines material noise, and removes all channel parts in a predetermined longitudinal noise determination length in a predetermined length around the longitudinal position from the defect determination part. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
