| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing with a detector for preventing lubrication failure in a bearing from occurring by detecting detailed information on deterioration of a lubricant such as the amount of foreign matter having got mixed in the lubricant and also by easily detecting the state of deterioration of the lubricant. SOLUTION: This lubricant deterioration detector 1 is equipped with: an optical system 2 comprising a plurality of light emitting elements 3A and 3B severally differing in wavelengths, and at least one light receiving element 4 entered by light of the plurality of the emitting elements 3A and 3B; and an estimation means 5 for estimating the state of deterioration of the lubricant 6. In the optical system 2, the lubricant 6 is caused to stand in optical paths between the elements 3A and 3B, and the element 4. The estimation means 5 estimates the state of deterioration of the lubricant 6 from wavelength-by-wavelength differences in absorptivity detected in an output of the element 4. Besides, the emitting elements can be of white while a plurality of light receiving elements different in wavelength sensitivity can be used. The deterioration detector 1 of this structure is mounted on a bearing. COPYRIGHT: (C)2007,JPO&INPIT
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