Optical sensing arrangements
US4865416A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1987 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Aug 28, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical sensing arrangement in which optical signals are transmitted along a plurality of discrete optical fibre paths of different lengths which are terminated in respective sensors adapted for sensing temperature, pressure or any other condition to be sensed at appropriate locations and in which optical signals reflected or otherwise caused to be transmitted back along the optical fibres of different lengths in response to the transmission of the optical signals along said fibres and in accordance with variations in conditions at the aforesaid locations are detected by optical time domain or frequency domain reflectometer means for determining the conditions at the sensor locations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.