ES8500660A1 - Optical fibre sensors - Google Patents

Optical fibre sensors

Info

Publication number
ES8500660A1
ES8500660A1 ES524719A ES524719A ES8500660A1 ES 8500660 A1 ES8500660 A1 ES 8500660A1 ES 524719 A ES524719 A ES 524719A ES 524719 A ES524719 A ES 524719A ES 8500660 A1 ES8500660 A1 ES 8500660A1
Authority
ES
Spain
Prior art keywords
optical
fibre
polarisations
modes
optical fibre
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
Application number
ES524719A
Other languages
Spanish (es)
Other versions
ES524719A0 (en
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES8500660A1 publication Critical patent/ES8500660A1/en
Publication of ES524719A0 publication Critical patent/ES524719A0/en
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G01L1/243—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using means for applying force perpendicular to the fibre axis
    • G01L1/245—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre using means for applying force perpendicular to the fibre axis using microbending
    • 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
    • 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
    • G01D5/35338—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 other arrangements than interferometer arrangements
    • G01D5/35341—Sensor working in transmission
    • G01D5/35345—Sensor working in transmission using Amplitude variations to detect the measured quantity
    • 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
    • G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
    • G01D5/35374—Particular layout of the fiber
    • 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
    • G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
    • G01D5/35377—Means for amplifying or modifying the measured quantity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
    • G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring 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
    • G01L11/02—Measuring 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 by optical means
    • G01L11/025—Measuring 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 by optical means using a pressure-sensitive optical fibre
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/14—Mode converters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/0128—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on electro-mechanical, magneto-mechanical, elasto-optic effects
    • G02F1/0131—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on electro-mechanical, magneto-mechanical, elasto-optic effects based on photo-elastic effects, e.g. mechanically induced birefringence
    • G02F1/0134—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on electro-mechanical, magneto-mechanical, elasto-optic effects based on photo-elastic effects, e.g. mechanically induced birefringence in optical waveguides

Abstract

A perturbation (P), such as pressure or vibration, is employed to periodically deform an optical fibre (1) supporting two modes, or two polarisations of one mode, of optical power launched into the fibre by, for example, urging it against an undulating support (2). The period of the undulations is chosen to match the beat length between the two modes, or polarisations, at a predetermined optical frequency. When the fibre (1) is thus deformed coupling between the modes, or polarisations, is achieved the extent of coupling being a measure of the perturbation causing the deformation. A distributed sensor comprising a number of such sensors is also described the optical fibre comprising both the sensing elements and the means interconnecting them. Since the beat length varies with optical frequency, the different sensing elements of such a distributed sensor may be resolved by using correspondingly different optical frequencies.
ES524719A 1982-08-03 1983-08-03 ONE STRUCTURE OF SENSOR PER FIBER OPTIC. Granted ES524719A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8222371A GB2125572B (en) 1982-08-03 1982-08-03 Optical fibre sensors

Publications (2)

Publication Number Publication Date
ES8500660A1 true ES8500660A1 (en) 1984-06-01
ES524719A0 ES524719A0 (en) 1984-06-01

Family

ID=10532076

Family Applications (1)

Application Number Title Priority Date Filing Date
ES524719A Granted ES524719A0 (en) 1982-08-03 1983-08-03 ONE STRUCTURE OF SENSOR PER FIBER OPTIC.

Country Status (5)

Country Link
JP (1) JPS5990025A (en)
AU (1) AU560013B2 (en)
ES (1) ES524719A0 (en)
GB (1) GB2125572B (en)
NZ (1) NZ204955A (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161609B (en) * 1984-07-11 1987-10-07 Stc Plc Optical fibres
SE443656B (en) * 1984-07-20 1986-03-03 Ericsson Telefon Ab L M MICROBOOK LIKE OPTICAL FIBER CABLE
US4735484A (en) * 1985-02-08 1988-04-05 Board Of Trustees Of The Leland Stanford Junior University Acousto-optic frequency shifter utilizing multi-turn optical fiber
US4986624A (en) * 1985-07-15 1991-01-22 The Board Of Trustees Of The Leland Stanford Junior University Optical fiber evanescent grating reflector
GB2182516A (en) * 1985-11-01 1987-05-13 Stc Plc Optical fibre network
GB2186683A (en) * 1986-02-15 1987-08-19 Pilkington Brothers Plc Optical fibre intrusion detector
GB2188164B (en) * 1986-03-19 1989-11-15 Stc Plc Optical fibre polariser
IT1190599B (en) * 1986-06-17 1988-02-16 Cselt Centro Studi Lab Telecom PROCEDURE AND DEVICE FOR THE MEASUREMENT OF THE BEATENING LENGTH OF THE POLARIZATION IN SINGLE-MODE HIGH-BIFRANFENCE OPTICAL FIBERS
GB2196424A (en) * 1986-10-24 1988-04-27 Boc Group Plc Detecting swelling beneath the skin
GB8704540D0 (en) * 1987-02-26 1987-04-01 Bicc Plc Optical sensors
GB2213588B (en) * 1987-12-08 1991-07-31 Plessey Co Plc Improvements relating to optical sensors
GB2215055B (en) * 1988-02-20 1992-04-01 Stc Plc Optical fibre sensor
EP0393956B1 (en) * 1989-04-19 1995-11-29 Bestquint Limited Optical fibre sensors
GB2238613A (en) * 1989-12-01 1991-06-05 R D P Electronics Limited Movement sensing process
DE19534260C2 (en) * 1995-09-15 2002-07-04 Friedrich Motzko Rope-shaped fiber optic load sensor
EP1011184A1 (en) * 1998-12-15 2000-06-21 Talltec Technologies Holdings S.A. Safety device for an electric motor-driven sliding panel and method for carrying out this arrangement
FR2794540B1 (en) * 1999-06-01 2001-08-10 Laurent Dellsperger DEVICE AND METHOD FOR MONITORING AND / OR CONTROLLING AT LEAST ONE ACTUATOR
WO2006089729A1 (en) * 2005-02-24 2006-08-31 Talltec Technologies Holdings S.A. Multimode optical fiber impact sensor operating in accordance with the principle of coupling between fiber-guided modes guided
EP1739394A1 (en) * 2005-06-30 2007-01-03 Talltec Technologies Holdings S.A. Shock sensor with multimode optical fibre following the principle of the coupling between the guided modes.
FR2921482B1 (en) * 2007-09-26 2009-11-13 Phosylab MULTIMODE OPTICAL FIBER OPTICAL TRANSDUCER, COUPLING MODES, METHOD FOR PRODUCING THE SAME
AU2012360911A1 (en) * 2011-12-30 2014-06-19 Shell Internationale Research Maatschappij B.V. Smart hydrocarbon fluid production method and system
DE102013107276A1 (en) 2012-07-11 2013-10-02 Lios Technology Gmbh Device for distributed optical pressure measurement in borehole, comprises optical light guide with core, which guides light from light source along measurement path, and casing that reacts to pressure change with elongation or contraction
CN109581400A (en) * 2019-01-31 2019-04-05 无锡流深光电科技有限公司 A kind of distribution type laser radar system and laser distance measurement method
GB2586974B (en) * 2019-09-06 2022-12-28 Nuron Ltd System for producing strain in a fibre
CN113299023B (en) * 2021-05-21 2022-08-30 孙安 Noise self-compensation distributed optical fiber anti-intrusion sensing array system and method

Also Published As

Publication number Publication date
GB2125572B (en) 1985-12-24
NZ204955A (en) 1986-07-11
JPS5990025A (en) 1984-05-24
GB2125572A (en) 1984-03-07
ES524719A0 (en) 1984-06-01
AU1741183A (en) 1984-02-09
AU560013B2 (en) 1987-03-26

Similar Documents

Publication Publication Date Title
ES8500660A1 (en) Optical fibre sensors
GB8425761D0 (en) Remote measurement of conditions
IL60936A0 (en) Fiber optic strain sensor
DE3662311D1 (en) Annular interferometric device with an optical monomode fibre
EP0371592A3 (en) Sensors using vibrating elements
IT8067634A0 (en) OPTICAL SYSTEM WITH HIGH COUPLING EFFICIENCY IN PARTICULAR FOR DEVICES FOR MEASURING THE ATTENUATION OF OPTICAL FIBERS THROUGH RETRO-DIFUSION
FR2435736B1 (en) OPTICAL FIBER CONNECTOR
CA2288746A1 (en) Distributed sensing system
AU2503777A (en) Optical fibre attenuation monitor
AR244918A1 (en) An optical amplifier of the active fibre type.
JPS53138382A (en) Vibration detector
ES8605896A1 (en) Temperature compensated optical pressure sensor
JPS5559416A (en) Connector for optical fiber and device for mounting optical fiber on the sleeve directly useable for connector
FR2351384A1 (en) PROCESS FOR MONITORING THE PROPERTIES OF A COATING, ESPECIALLY OF OPTICAL FIBERS
JPS5360652A (en) Connector for coupling optical fiber
GB9205104D0 (en) Temperature compensator for an optic fiber pressure transducer
GB2056763B (en) Piezoelectric vibration sensor
JPS5698622A (en) Optical fiber sound pressure sensor
FR2588657B1 (en) FORCE SENSOR COMPRISING A RESONATOR OF WHICH THE FREQUENCY VARIES AS A FUNCTION OF THE FORCE APPLIED
GB2056672B (en) Optical fibre sensor
BR7902641A (en) PRESSURE TRANSDUCER HAVING ELECTRICALLY ARMORED PIEZORESISTIVE SENSORS
JPS5649932A (en) Pressure-detecting device
NO905435D0 (en) DEVICE AND PROCEDURE FOR DETERMINING THE ELASTIC CHARACTERISTICS OF OPTICAL FIBERS BY CONTACT SURFACE MEASUREMENTS.
JPS56120924A (en) Vibrator for optical chopper of light detecting device
IT7927456A0 (en) PROCEDURE FOR MEASURING DAMPING ON LIGHT CONDUCTING FIBERS.