2023 Volume 2 Issue 1 Pages 118-125
In this study, the authors developed an extremely-low frequency magnetic non-destructive measuring device for the thickness of steel sheet piles without removing the adhered products. First, the authors investigated the effect of rust and lift-off on extremely-low eddy current testing device, and developed a magnetic sensor probe with a 100 mm × 100 mm square coil for measuring steel sheet piles. Then, the developed sensor probe was used to measure the actual steel sheet piles. As a result, the thickness of steel sheet piles measured by probing by divers and the thickness of steel sheet piles measured from the land by a mechanical arm were almost the same as the thickness measured by ultrasonic measurement after removing the adhered products.
