| 摘要 |
PROBLEM TO BE SOLVED: To provide a wear depth estimation method and apparatus capable of precisely detecting wear depth even when the configuration of wear is other than circular.SOLUTION: The wear depth estimation uses a data base 5 in which the leakage magnetic flux density in a direction parallel to an objective plane in the leakage magnetic flux density leaking from a magnetized object 3 to be inspected and a cross sectional area of the wear of the object to be inspected are associated with each other. The wear depth estimation method includes: a leakage magnetic flux density detection step to detect the leakage magnetic flux density in a direction parallel to the surface of the object to be inspected by scanning the object 3 to be inspected; a wear cross section estimation step to estimate the cross section area of the wear based on the leakage magnetic flux density detected in the leakage magnetic flux density detection step and the data base 5; a wear width estimation step to estimate the width of the wear based on the leakage magnetic flux density detected in the leakage magnetic flux density detection step; and a wear depth calculation step to calculate the wear depth based on the wear width estimated in the wear width estimation step and the cross section area of the wear estimated in the wear cross section estimation step. |
