Determining the deterioration of oils using fluorescence rise-time
US10281448B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2016 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Aug 18, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2011/008
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods, media, and devices for determining the deterioration of an oil by determining the viscosity of the oil from fluorescence rise-time are provided. A sample of an oil from a machine may be obtained. The oil sample may be irradiated using a light source such a laser to induce fluorescence in the oil sample. The induced fluorescence may be filtered and collimated before being detecting by a photodiode. The relative intensity of the fluorescence may be measured over a time period at a sample rate and used to determine the fluorescence rise-time of the oil sample. The viscosity of the oil sample may be determined from the fluorescence rise-time. The determined viscosity may be compared to viscosity threshold value to determine the deterioration of the oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.