CA2355091A1 - Apparatus and method for monitoring a structure using a counter-propagating signal method for locating events - Google Patents

Apparatus and method for monitoring a structure using a counter-propagating signal method for locating events Download PDF

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Publication number
CA2355091A1
CA2355091A1 CA002355091A CA2355091A CA2355091A1 CA 2355091 A1 CA2355091 A1 CA 2355091A1 CA 002355091 A CA002355091 A CA 002355091A CA 2355091 A CA2355091 A CA 2355091A CA 2355091 A1 CA2355091 A1 CA 2355091A1
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CA
Canada
Prior art keywords
waveguide
counter
monitoring
light
propagating signal
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.)
Granted
Application number
CA002355091A
Other languages
French (fr)
Other versions
CA2355091C (en
Inventor
Edward E. Tapanes
Jason R. Goode
Jim Katsifolis
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.)
Future Fibre Technologies Pty Ltd
Original Assignee
Individual
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
Priority claimed from AUPP7808A external-priority patent/AUPP780898A0/en
Priority claimed from AUPQ0126A external-priority patent/AUPQ012699A0/en
Application filed by Individual filed Critical Individual
Publication of CA2355091A1 publication Critical patent/CA2355091A1/en
Application granted granted Critical
Publication of CA2355091C publication Critical patent/CA2355091C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
    • 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]
    • 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
    • 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
    • G01M11/39—Testing of optical devices, constituted by fibre optics or optical waveguides in which light is projected from both sides of the fiber or waveguide end-face
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0025—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of elongated objects, e.g. pipes, masts, towers or railways
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0091—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by using electromagnetic excitation or detection

Abstract

An apparatus and method for monitoring a structure such as machines, buildings, fibre optic communication links and infra-structure is disclosed which includes a waveguide (10) and a tight source (20) for launching light into both ends of the waveguide (10) so that counter-propagating light signals are produced in the waveguide (10). The waveguide (10) is in the form of an optical fibre or fibre bundle formed from silica and in which the characteristic of the light is modified or effected by an external parameter caused by an event. A
detector (30) is provided for detecting light form both ends of the waveguide (10) and for determining the time delay or difference between the modified signals which have been effected by the parameter in order to determine the location of the event along the length of the waveguide (10).
CA002355091A 1998-12-18 1999-11-19 Apparatus and method for monitoring a structure using a counter-propagating signal method for locating events Expired - Lifetime CA2355091C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
AUPP7808A AUPP780898A0 (en) 1998-12-18 1998-12-18 Counter-propagating signal method for locating events in fibre optic sensor systems
AUPP7808 1998-12-18
AUPQ0126A AUPQ012699A0 (en) 1999-05-03 1999-05-03 Intrinsic securing of fibre optic communication links
AUPQ0126 1999-05-03
PCT/AU1999/001028 WO2000037925A1 (en) 1998-12-18 1999-11-19 Apparatus and method for monitoring a structure using a counter-propagating signal method for locating events

Publications (2)

Publication Number Publication Date
CA2355091A1 true CA2355091A1 (en) 2000-06-29
CA2355091C CA2355091C (en) 2007-04-10

Family

ID=25645948

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002355091A Expired - Lifetime CA2355091C (en) 1998-12-18 1999-11-19 Apparatus and method for monitoring a structure using a counter-propagating signal method for locating events

Country Status (9)

Country Link
US (2) US6621947B1 (en)
JP (1) JP4869480B2 (en)
KR (1) KR100715589B1 (en)
CN (1) CN1179205C (en)
AU (1) AU747525B2 (en)
CA (1) CA2355091C (en)
IL (1) IL142943A (en)
RU (1) RU2226270C2 (en)
WO (1) WO2000037925A1 (en)

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Also Published As

Publication number Publication date
US6621947B1 (en) 2003-09-16
IL142943A0 (en) 2002-04-21
WO2000037925A1 (en) 2000-06-29
JP4869480B2 (en) 2012-02-08
RU2226270C2 (en) 2004-03-27
AU1536900A (en) 2000-07-12
AU747525B2 (en) 2002-05-16
CN1179205C (en) 2004-12-08
CN1330769A (en) 2002-01-09
JP2002533672A (en) 2002-10-08
KR20010101239A (en) 2001-11-14
US20030198425A1 (en) 2003-10-23
CA2355091C (en) 2007-04-10
IL142943A (en) 2004-09-27
KR100715589B1 (en) 2007-05-10
US6778717B2 (en) 2004-08-17

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Effective date: 20191119