Bearing damage evaluation method and evaluation apparatus bearing damage

摘要

PPROBLEM TO BE SOLVED: To provide a bearing damage evaluation technique capable of securing determination reference of abnormality, establishing a detection method in an evaluation device, specifying an abnormal range, grasping the degree of the abnormality, and precisely evaluating a bearing damage, particularly to provide a bearing damage evaluation technique capable of evaluating the bearing damage not only qualitatively but also quantitatively. PSOLUTION: This bearing damage evaluation device comprises an echo height ratio calculating means 63a for determining the echo height ratio H based on the reflected wave received by an ultrasonic probe 9; a differential value calculating means 63b for determining at least primary or secondary differential value based on the determined echo height ratio H; an average value calculating means 63c for determining average values of the echo height ratio H, the primary differential value; or/and the secondary differential value, and a waveform analyzing means 63d for analyzing deformation degree of a waveform signal of the echo height ratio H based on the primary differential value, the secondary differential value, and the average values. PCOPYRIGHT: (C)2006,JPO&NCIPI