Method and device for measuring moisture content
US5343045A · kind A · utility
7Cited by
15References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1993 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Jun 11, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/4738
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring the moisture content of an absorbent material, for example the paper insulation in an electrical transformer, uses a back scattered radiation technique to determine the absorption of light at specific wavelengths. A ratio of the back scattered radiation at different wavelengths can be compared against known values corresponding to a specific moisture content. An optical waveguide such as a bifurcated optical fibre is provided with a probe end optically coupled to a source end and a detection end, for transmitting light to the absorbent material and transmitting back scattered radiation to a detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.