Distributed fiber optic temperature sensor based on time domain transmission
US5035511A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1990 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Apr 10, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for sensing temperature of a surface comprises a plurality of time domain intensity transmission networks. Each network comprises pairs of fiber optic power dividers which are connected to each other by bridges. One power divider in each pair is connected in a series by delay lines that form an output bus for propagating a light pulse supplied to an initial power divider in the output bus. This produces a train of light pulses which are returned to a light detector by a receiving bus which interconnects the power dividers at the opposite end of each bridge. Each power divider is in thermal contact with the surface whose temperature is to be measured and the intensity of the train of light pulses is changed in accordance with changes in the temperature of the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.