WO2007149925A3 - Fiber optic sensor usable over wide range of gage lengths - Google Patents

Fiber optic sensor usable over wide range of gage lengths Download PDF

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Publication number
WO2007149925A3
WO2007149925A3 PCT/US2007/071679 US2007071679W WO2007149925A3 WO 2007149925 A3 WO2007149925 A3 WO 2007149925A3 US 2007071679 W US2007071679 W US 2007071679W WO 2007149925 A3 WO2007149925 A3 WO 2007149925A3
Authority
WO
WIPO (PCT)
Prior art keywords
ferrule
fiber optic
optic sensor
fiber
wide range
Prior art date
Application number
PCT/US2007/071679
Other languages
French (fr)
Other versions
WO2007149925B1 (en
WO2007149925A2 (en
Inventor
W Don Morison
Gerald Manuelpillai
Roderick C Tennyson
Thierry Cherpillod
Dominic Rouse
Original Assignee
Fiber Optic Systems Technology
W Don Morison
Gerald Manuelpillai
Roderick C Tennyson
Thierry Cherpillod
Dominic Rouse
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 Fiber Optic Systems Technology, W Don Morison, Gerald Manuelpillai, Roderick C Tennyson, Thierry Cherpillod, Dominic Rouse filed Critical Fiber Optic Systems Technology
Publication of WO2007149925A2 publication Critical patent/WO2007149925A2/en
Publication of WO2007149925A3 publication Critical patent/WO2007149925A3/en
Publication of WO2007149925B1 publication Critical patent/WO2007149925B1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/02015—Interferometers characterised by the beam path configuration
    • G01B9/02027—Two or more interferometric channels or interferometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/02055—Reduction or prevention of errors; Testing; Calibration
    • G01B9/02056—Passive reduction of errors
    • G01B9/02057—Passive reduction of errors by using common path configuration, i.e. reference and object path almost entirely overlapping
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B9/00—Measuring instruments characterised by the use of optical techniques
    • G01B9/02—Interferometers
    • G01B9/0209—Low-coherence interferometers
    • 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
    • G01D5/268—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 using 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
    • G01D5/35306—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 an interferometer arrangement
    • G01D5/35309—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 an interferometer arrangement using multiple waves interferometer
    • G01D5/35312—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 an interferometer arrangement using multiple waves interferometer using a Fabry Perot
    • 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
    • G01M11/08—Testing mechanical properties
    • G01M11/083—Testing mechanical properties by using an optical fiber in contact with the device under test [DUT]

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Optical Transform (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

A fiber optic sensor includes two reflective elements in series. The first reflective element is formed as a partially mirrored surface on the end of a single-mode optical fiber lead which is bonded into a ferrule. A sleeve is used to join the ferrule to a second ferrule which is turn is bonded to a length of single-mode optical fiber. The second reflective element is a partially mirrored surface on the cleaved end of the second fiber. The second fiber may be affixed to or embedded in a structure to be monitored and changes its optical path length in response to a condition of the structure. The ease of fabrication and functionality of the sensor is significantly improved by the use of reflective elements within the ferrule which have a prescribed angle of incidence relative to the light path within the optical fiber.
PCT/US2007/071679 2006-06-20 2007-06-20 Fiber optic sensor usable over wide range of gage lengths WO2007149925A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UAA200606915 2006-06-20
UA200606915 2006-06-20

Publications (3)

Publication Number Publication Date
WO2007149925A2 WO2007149925A2 (en) 2007-12-27
WO2007149925A3 true WO2007149925A3 (en) 2008-05-02
WO2007149925B1 WO2007149925B1 (en) 2008-06-26

Family

ID=38834354

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/071679 WO2007149925A2 (en) 2006-06-20 2007-06-20 Fiber optic sensor usable over wide range of gage lengths

Country Status (1)

Country Link
WO (1) WO2007149925A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102635399A (en) * 2012-04-25 2012-08-15 复旦大学 Mine emergency rescue communication method and system based on optical fiber sensing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5698848A (en) * 1995-06-07 1997-12-16 Mcdonnell Douglas Corporation Fiber optic sensing systems and methods including contiguous optical cavities
US6289143B1 (en) * 1996-07-12 2001-09-11 Mcdermott Technology, Inc. Fiber optic acoustic emission sensor
US6870975B1 (en) * 2001-11-14 2005-03-22 Fiber Optic Systems Technology, Inc. Fiber optic sensor usable over wide range of gage lengths

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5698848A (en) * 1995-06-07 1997-12-16 Mcdonnell Douglas Corporation Fiber optic sensing systems and methods including contiguous optical cavities
US6289143B1 (en) * 1996-07-12 2001-09-11 Mcdermott Technology, Inc. Fiber optic acoustic emission sensor
US6870975B1 (en) * 2001-11-14 2005-03-22 Fiber Optic Systems Technology, Inc. Fiber optic sensor usable over wide range of gage lengths

Also Published As

Publication number Publication date
WO2007149925B1 (en) 2008-06-26
WO2007149925A2 (en) 2007-12-27

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