Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe
US6450037B1 · kind B1 · utility
110Cited by
18References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1999 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Jun 25, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L11/025
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Non-intrusive pressure sensors 14-18 for measuring unsteady pressures within a pipe 12 include an optical fiber 10 wrapped in coils 20-24 around the circumference of the pipe 12. The length or change in length of the coils 20-24 is indicative of the unsteady pressure in the pipe. Bragg gratings 310-324 impressed in the fiber 10 may be used having reflection wavelengths &lgr; that relate to the unsteady pressure in the pipe. One or more of sensors 14-18 may be axially distributed along the fiber 10 using wavelength division multiplexing and/or time division multiplexing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.