Refined oil degradation level measuring instrument and refined oil degradation level measuring method
US8704174B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2010 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Dec 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2876
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In situ monitoring of a degradation level of refined oil during use is provided. An excitation light irradiation unit varies intensity of excitation light to irradiate the excitation light onto the refined oil with a resulting fluorescence. A fluorescence intensity detection unit detects the intensity of fluorescence generated by the irradiation of the excitation light, and a time lag characteristic calculation unit calculates a time lag characteristic of a fluorescence intensity variation with respect to the intensity variation of the excitation light. A degradation index value acquisition unit provides to a predetermined correlation between a degradation index value indicating a degradation level of the refined oil and the time lag characteristic is used to acquire a degradation index value from a time lag characteristic calculated in the time lag characteristic calculation unit to determine the current degradation status of the oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.