GB2211605B - Improvements relating to optical sensing systems - Google Patents

Improvements relating to optical sensing systems

Info

Publication number
GB2211605B
GB2211605B GB8829109A GB8829109A GB2211605B GB 2211605 B GB2211605 B GB 2211605B GB 8829109 A GB8829109 A GB 8829109A GB 8829109 A GB8829109 A GB 8829109A GB 2211605 B GB2211605 B GB 2211605B
Authority
GB
United Kingdom
Prior art keywords
optical sensing
improvements relating
sensing systems
systems
relating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB8829109A
Other versions
GB2211605A (en
GB8829109D0 (en
Inventor
David Andrew James Pearce
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB8829109D0 publication Critical patent/GB8829109D0/en
Publication of GB2211605A publication Critical patent/GB2211605A/en
Application granted granted Critical
Publication of GB2211605B publication Critical patent/GB2211605B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING 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
    • G01D5/00—Mechanical 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
    • G01D5/26—Mechanical 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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical 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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical 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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical 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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35383—Mechanical 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 characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • G01M11/3145—Details of the optoelectronics or data analysis
GB8829109A 1987-12-23 1988-12-14 Improvements relating to optical sensing systems Expired - Fee Related GB2211605B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878730061A GB8730061D0 (en) 1987-12-23 1987-12-23 Improvements relating to optical sensing systems

Publications (3)

Publication Number Publication Date
GB8829109D0 GB8829109D0 (en) 1989-01-25
GB2211605A GB2211605A (en) 1989-07-05
GB2211605B true GB2211605B (en) 1991-12-18

Family

ID=10628994

Family Applications (2)

Application Number Title Priority Date Filing Date
GB878730061A Pending GB8730061D0 (en) 1987-12-23 1987-12-23 Improvements relating to optical sensing systems
GB8829109A Expired - Fee Related GB2211605B (en) 1987-12-23 1988-12-14 Improvements relating to optical sensing systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB878730061A Pending GB8730061D0 (en) 1987-12-23 1987-12-23 Improvements relating to optical sensing systems

Country Status (1)

Country Link
GB (2) GB8730061D0 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5028146A (en) * 1990-05-21 1991-07-02 Kabushiki Kaisha Toshiba Apparatus and method for measuring temperatures by using optical fiber
US5178465A (en) * 1990-07-11 1993-01-12 Fujikura Ltd. Optical fiber laying structure for electric power cable line trouble occurrence location detecting system
JP2575324B2 (en) * 1991-03-02 1997-01-22 株式会社フジクラ Optical fiber type temperature distribution measuring device
US5485264A (en) * 1993-12-14 1996-01-16 Antel Optronics, Inc. High dynamic range OTDR data acquisition circuit
DE102004015945B3 (en) * 2004-03-25 2005-12-29 Ufz-Umweltforschungszentrum Leipzig-Halle Gmbh Determining the temperature of a medium comprises coupling electromagnetic radiation with a Raman-active substance via an optical fiber, arranging the Raman-active substance in the medium and further processing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122953A1 (en) * 1983-04-23 1984-10-31 ANT Nachrichtentechnik GmbH Method for the determination of the backscatter diagram of a beam waveguide

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122953A1 (en) * 1983-04-23 1984-10-31 ANT Nachrichtentechnik GmbH Method for the determination of the backscatter diagram of a beam waveguide

Also Published As

Publication number Publication date
GB8730061D0 (en) 1988-02-03
GB2211605A (en) 1989-07-05
GB8829109D0 (en) 1989-01-25

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921214