Title:
DISTRIBUTED OPTICAL FIBRE SENSOR
Document Type and Number:
WIPO Patent Application WO/2012/063066
Kind Code:
A3
Abstract:
There is described a distributed optical fibre sensor for detecting one or more physical parameters indicative of an environmental influence on a sensor optical fibre, as a function of position along the sensor fibre. The sensor uses probe light pulses of different wavelengths. At least some of the probe light pulses may also be of different pulse lengths. The relative phase bias between interferometric signals in backscattered probe light of different wavelength pulses may also be controlled.
Inventors:
DR HANDEREK VINCENT (GB)
Application Number:
PCT/GB2011/052183
Publication Date:
August 23, 2012
Filing Date:
November 09, 2011
Export Citation:
Assignee:
FOTECH SOLUTIONS LTD (GB)
DR HANDEREK VINCENT (GB)
DR HANDEREK VINCENT (GB)
International Classes:
G01D3/032; G01D5/353; G01D18/00
Domestic Patent References:
| WO2008056143A1 | 2008-05-15 | |||
| WO2010009007A1 | 2010-01-21 |
Foreign References:
| EP1912050A1 | 2008-04-16 | |||
| US5841131A | 1998-11-24 | |||
| US5757487A | 1998-05-26 | |||
| US5621517A | 1997-04-15 | |||
| EP1568981A2 | 2005-08-31 |
Other References:
POSEY R ET AL: "Strain sensing based on coherent Rayleigh scattering in an optical fibre", ELECTRONICS LETTERS, IEE STEVENAGE, GB, vol. 36, no. 20, 28 September 2000 (2000-09-28), pages 1688 - 1689, XP006015752, ISSN: 0013-5194, DOI: 10.1049/EL:20001200
DAKIN J P ET AL: "REVIEW ARTICLE; Multiplexed and distributed optical fibre sensor systems", JOURNAL OF PHYSICS E. SCIENTIFIC INSTRUMENTS, IOP PUBLISHING, BRISTOL, GB, vol. 20, no. 8, 1 August 1987 (1987-08-01), pages 954 - 967, XP020018611, ISSN: 0022-3735, DOI: 10.1088/0022-3735/20/8/002
DAKIN J P ET AL: "REVIEW ARTICLE; Multiplexed and distributed optical fibre sensor systems", JOURNAL OF PHYSICS E. SCIENTIFIC INSTRUMENTS, IOP PUBLISHING, BRISTOL, GB, vol. 20, no. 8, 1 August 1987 (1987-08-01), pages 954 - 967, XP020018611, ISSN: 0022-3735, DOI: 10.1088/0022-3735/20/8/002
Attorney, Agent or Firm:
PALMER, Jonathan Richard (70 Gray's Inn Road, London London WC1X 8BT, GB)
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