Distributed fiber-optic sensor with substance selective permeable coating
US5138153A · kind A · utility
23Cited by
12References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Jul 13, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/0385
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor system comprises a fibe optic cable, or a fiber optic cable covered with a cladding, coated with a membrane that is sensitive to a particular substance to be detected. Contact with the material to be detected causes the membrane's index of refraction (normally less than that of the fiber core) to increase, decreasing the intensity of the light transmitted by the core. The fiber-optic sensor can be used to monitor one or more storage tanks for leakage by placing the fiber cable beneath the surface surrounding the tank(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.