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1. WO2009032881 - HIGH SPATIAL RESOLUTION DISTRIBUTED TEMPERATURE SENSING SYSTEM

Publication Number WO/2009/032881
Publication Date 12.03.2009
International Application No. PCT/US2008/075187
International Filing Date 04.09.2008
IPC
G01D 5/353 2006.01
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; TRANSFERRING OR TRANSDUCING ARRANGEMENTS NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
26using optical means, i.e. using infra-red, visible or ultra-violet light
32with attenuation or whole or partial obturation of beams of light
34the beams of light being detected by photocells
353influencing the transmission properties of an optical fibre
G01K 11/32 2006.01
GPHYSICS
01MEASURING; TESTING
KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
11Measuring temperature based on physical or chemical changes not covered by group G01K3/, G01K5/, G01K7/, or G01K9/202
32using changes in transmission, scattering or fluorescence in optical fibres
G01L 1/24 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
24by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
CPC
G01D 5/35383
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
5Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
26characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light
32with attenuation or whole or partial obturation of beams of light
34the beams of light being detected by photocells
353influencing the transmission properties of an optical fibre
35383using multiple sensor devices using multiplexing techniques
G01K 11/3206
GPHYSICS
01MEASURING; TESTING
KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
11Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
32using changes in transmission, scattering or fluorescence in optical fibres
3206at discrete locations in the fibre, e.g. by means of Bragg gratings
G01L 1/242
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
24by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis ; using infra-red, visible light, ultra-violet
242the material being an optical fibre
G01L 1/246
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
24by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis ; using infra-red, visible light, ultra-violet
242the material being an optical fibre
246using integrated gratings, e.g. Bragg gratings
G01L 11/025
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
11Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
02by optical means
025using a pressure-sensitive optical fibre
Applicants
  • SHELL OIL COMPANY [US]/[US] (SM)
  • SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. [NL]/[NL] (AllExceptUS)
  • RAMBOW, Frederick Henry Kreisler [US]/[US] (UsOnly)
Inventors
  • RAMBOW, Frederick Henry Kreisler
Agents
  • WATKINS, Marcella D.
Priority Data
60/970,39906.09.2007US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HIGH SPATIAL RESOLUTION DISTRIBUTED TEMPERATURE SENSING SYSTEM
(FR) SYSTÈME DE CAPTEURS DE TEMPÉRATURE RÉPARTIS À RÉSOLUTION SPATIALE ÉLEVÉE
Abstract
(EN)
A system and a method that are useful for making temperature measurements that are distributed over a distance. In one aspect, the system comprises a plurality of Bragg grating measurement points disposed in an optical fiber with a predetermined spacing between adjacent Bragg grating measurement points. The system also comprises a substrate with the optical fiber disposed thereon, the optical fiber wrapped around the substrate with at least one predetermined wrap angle. The predetermined wrap angle and the predetermined spacing may be selected to allow a temperature measurement signal to be distinguished from a bending measurement signal. The substrate may have a first coefficient of thermal expansion greater than a second coefficient of thermal expansion of the optical fiber and may comprise alternating sections of hollow tube and solid rod.
(FR)
L'invention concerne un système et un procédé permettant de réaliser des mesures de température réparties sur une distance. Dans un aspect, le système comprend plusieurs points de mesure à réseau de Bragg disposés dans une fibre optique et séparés les uns des autres par une distance prédéterminée. Le système comprend également un substrat sur lequel la fibre optique est disposée, la fibre optique étant enroulée autour du substrat avec au moins un angle d'enroulement prédéterminé. L'angle d'enroulement prédéterminé et la distance prédéterminée peuvent être choisis de manière à faire la distinction entre un signal de mesure de température et un signal de mesure d'inclinaison. Le coefficient de dilatation thermique du substrat peut être supérieur au coefficient de dilatation thermique de la fibre optique, et le substrat peut comprendre des sections de tube creux et de tige solide en alternance.
Also published as
GB1002089.9
Latest bibliographic data on file with the International Bureau