WO2005095917A3 - Evaluating the position of a time-varying disturbance - Google Patents
Evaluating the position of a time-varying disturbance Download PDFInfo
- Publication number
- WO2005095917A3 WO2005095917A3 PCT/GB2005/001269 GB2005001269W WO2005095917A3 WO 2005095917 A3 WO2005095917 A3 WO 2005095917A3 GB 2005001269 W GB2005001269 W GB 2005001269W WO 2005095917 A3 WO2005095917 A3 WO 2005095917A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- time
- disturbance
- pulse
- optical
- pair
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 abstract 3
- 230000005856 abnormality Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 238000000253 optical time-domain reflectometry Methods 0.000 abstract 1
Classifications
-
- 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
-
- 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
- G01D5/35303—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 a reference fibre, e.g. interferometric devices
-
- 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
- G01M11/3172—Reflectometers detecting the back-scattered light in the frequency-domain, e.g. OFDR, FMCW, heterodyne detection
Abstract
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020067022655A KR101397775B1 (en) | 2004-03-31 | 2005-03-31 | Evaluating the position of a time-varying disturbance |
CA002560780A CA2560780A1 (en) | 2004-03-31 | 2005-03-31 | Evaluating the position of a time-varying disturbance |
US10/594,433 US7974182B2 (en) | 2004-03-31 | 2005-03-31 | Evaluating the position of a disturbance |
JP2007505635A JP4880586B2 (en) | 2004-03-31 | 2005-03-31 | Disturbance location assessment |
CN2005800099054A CN1938575B (en) | 2004-03-31 | 2005-03-31 | Evaluating the position of disturbance |
EP05733029.2A EP1747445B1 (en) | 2004-03-31 | 2005-03-31 | Evaluating the position of a time-varying disturbance |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0407386.2 | 2004-03-31 | ||
GBGB0407386.2A GB0407386D0 (en) | 2004-03-31 | 2004-03-31 | Monitoring a communications link |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005095917A2 WO2005095917A2 (en) | 2005-10-13 |
WO2005095917A3 true WO2005095917A3 (en) | 2005-11-24 |
Family
ID=32247650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB2005/001269 WO2005095917A2 (en) | 2004-03-31 | 2005-03-31 | Evaluating the position of a time-varying disturbance |
Country Status (8)
Country | Link |
---|---|
US (1) | US7974182B2 (en) |
EP (1) | EP1747445B1 (en) |
JP (1) | JP4880586B2 (en) |
KR (1) | KR101397775B1 (en) |
CN (1) | CN1938575B (en) |
CA (1) | CA2560780A1 (en) |
GB (1) | GB0407386D0 (en) |
WO (1) | WO2005095917A2 (en) |
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US20080232242A1 (en) | 2008-09-25 |
US7974182B2 (en) | 2011-07-05 |
KR101397775B1 (en) | 2014-05-20 |
CA2560780A1 (en) | 2005-10-13 |
WO2005095917A2 (en) | 2005-10-13 |
EP1747445B1 (en) | 2018-09-12 |
JP4880586B2 (en) | 2012-02-22 |
KR20070011418A (en) | 2007-01-24 |
CN1938575A (en) | 2007-03-28 |
GB0407386D0 (en) | 2004-05-05 |
JP2007530970A (en) | 2007-11-01 |
EP1747445A2 (en) | 2007-01-31 |
CN1938575B (en) | 2011-05-18 |
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