DK427189A - Lyslederovervaagningssystem og fremgangsmaade til at overvaage en lysleder - Google Patents

Lyslederovervaagningssystem og fremgangsmaade til at overvaage en lysleder

Info

Publication number
DK427189A
DK427189A DK427189A DK427189A DK427189A DK 427189 A DK427189 A DK 427189A DK 427189 A DK427189 A DK 427189A DK 427189 A DK427189 A DK 427189A DK 427189 A DK427189 A DK 427189A
Authority
DK
Denmark
Prior art keywords
monitoring
filter
field
monitoring system
field monitoring
Prior art date
Application number
DK427189A
Other languages
English (en)
Other versions
DK427189D0 (da
Inventor
Ian Arthur White
Iii Willard Chandler White
Lawrence Russell Dunn
Original Assignee
American Telephone & Telegraph
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 American Telephone & Telegraph filed Critical American Telephone & Telegraph
Publication of DK427189D0 publication Critical patent/DK427189D0/da
Publication of DK427189A publication Critical patent/DK427189A/da

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/03—Arrangements for fault recovery
    • H04B10/032—Arrangements for fault recovery using working and protection systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection
    • 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
    • G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
    • G01M11/331—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face by using interferometer
    • 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
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4439—Auxiliary devices
    • G02B6/4469—Security aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)
  • Optical Communication System (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)
DK427189A 1988-08-31 1989-08-30 Lyslederovervaagningssystem og fremgangsmaade til at overvaage en lysleder DK427189A (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/238,810 US4904050A (en) 1988-08-31 1988-08-31 Methods of and systems for optical fiber sensing

Publications (2)

Publication Number Publication Date
DK427189D0 DK427189D0 (da) 1989-08-30
DK427189A true DK427189A (da) 1990-03-01

Family

ID=22899406

Family Applications (1)

Application Number Title Priority Date Filing Date
DK427189A DK427189A (da) 1988-08-31 1989-08-30 Lyslederovervaagningssystem og fremgangsmaade til at overvaage en lysleder

Country Status (11)

Country Link
US (1) US4904050A (da)
EP (1) EP0364093B1 (da)
JP (1) JPH06103857B2 (da)
KR (1) KR0139547B1 (da)
AU (1) AU598718B2 (da)
CA (1) CA1316235C (da)
DE (1) DE68923671T2 (da)
DK (1) DK427189A (da)
ES (1) ES2075052T3 (da)
HK (1) HK34096A (da)
IL (1) IL91463A (da)

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US5311592A (en) * 1986-06-11 1994-05-10 Mcdonnell Douglas Corporation Sagnac interferometer based secure communication system
GB8728854D0 (en) * 1987-12-10 1988-01-27 British Telecomm Optical device
GB8805844D0 (en) * 1988-03-11 1988-04-13 British Telecomm Detection of stress applied to optical fibre
DE4037077A1 (de) * 1990-11-22 1992-05-27 Hilti Ag Verfahren und einrichtung zur faseroptischen kraftmessung
US5144689A (en) * 1991-07-30 1992-09-01 Fiber Sensys, Inc. Multimode fiber sensor system with sensor fiber coupled to a detection fiber by spacer means
US5355208A (en) * 1992-06-24 1994-10-11 Mason & Hanger National, Inc. Distributed fiber optic sensor for locating and identifying remote disturbances
US5414785A (en) * 1993-09-13 1995-05-09 At&T Corp. Optical data bus having collision detection capability
US5699176A (en) * 1995-11-06 1997-12-16 Lucent Technologies Inc. Upgradable fiber-coax network
US5567933A (en) * 1995-02-14 1996-10-22 Mason & Hanger National, Inc. Optical fiber detection system with disturbance and positive cut-loop detection capabilities
FR2756053B1 (fr) * 1996-11-21 1999-01-29 Quantel Dispositif de detection de dommage dans une fibre optique
US5778114A (en) * 1997-04-18 1998-07-07 Eslambolchi; Hossein Fiber analysis method and apparatus
US5991013A (en) * 1998-10-27 1999-11-23 At&T Corp. Conveyance warning member with sacrificial fiber
US6148123A (en) * 1999-03-17 2000-11-14 At&T Corp Method and apparatus for measuring optical distances
PT1315866E (pt) * 2000-09-05 2008-07-07 Fieldturf Tarkett Inc Disposição de superfície circundante de pista de aeroporto
US7667849B2 (en) 2003-09-30 2010-02-23 British Telecommunications Public Limited Company Optical sensor with interferometer for sensing external physical disturbance of optical communications link
GB0322859D0 (en) 2003-09-30 2003-10-29 British Telecomm Communication
NL1024456C2 (nl) * 2003-10-06 2005-04-07 Lightspeed Inv S B V Signaalleiding, hekwerk en werkwijze voor het vervaardigen van een hekwerk.
GB0407386D0 (en) 2004-03-31 2004-05-05 British Telecomm Monitoring a communications link
US20050244116A1 (en) * 2004-04-28 2005-11-03 Evans Alan F Cables and cable installations
EP1794904A1 (en) 2004-09-30 2007-06-13 British Telecommunications Public Limited Company Identifying or locating waveguides
GB0421747D0 (en) 2004-09-30 2004-11-03 British Telecomm Distributed backscattering
US20060071770A1 (en) * 2004-10-04 2006-04-06 Frank Giotto Fiber optic cable sensor for movable objects
GB0427733D0 (en) 2004-12-17 2005-01-19 British Telecomm Optical system
CA2589792A1 (en) 2004-12-17 2006-06-22 British Telecommunications Public Limited Company Assessing a network
GB0504579D0 (en) 2005-03-04 2005-04-13 British Telecomm Communications system
ATE434774T1 (de) 2005-03-04 2009-07-15 British Telecomm Akustooptische modulatoranordnung
EP1708388A1 (en) 2005-03-31 2006-10-04 British Telecommunications Public Limited Company Communicating information
EP1713301A1 (en) 2005-04-14 2006-10-18 BRITISH TELECOMMUNICATIONS public limited company Method and apparatus for communicating sound over an optical link
EP1729096A1 (en) 2005-06-02 2006-12-06 BRITISH TELECOMMUNICATIONS public limited company Method and apparatus for determining the position of a disturbance in an optical fibre
EP1826924A1 (en) 2006-02-24 2007-08-29 BRITISH TELECOMMUNICATIONS public limited company Sensing a disturbance
CA2643344A1 (en) 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Sensing a disturbance
CA2643345A1 (en) 2006-02-24 2007-08-30 British Telecommunications Public Limited Company Sensing a disturbance
US8670662B2 (en) 2006-04-03 2014-03-11 British Telecommunications Public Limited Company Evaluating the position of an optical fiber disturbance
WO2008100295A2 (en) * 2006-10-23 2008-08-21 Fieldturf Tarkett Inc. Aircraft arrestor system and method of decelerating an aircraft
GB2443661B (en) * 2006-11-08 2011-08-31 Polarmetrix Ltd Detecting a disturbance in the phase of light propogating in an optical waveguide
WO2010034988A1 (en) * 2008-09-23 2010-04-01 Schlumberger Holdings Limited Redundant optical fiber system and method for remotely monitoring the condition of a pipeline
US8593621B2 (en) 2010-04-30 2013-11-26 International Business Machines Corporation Testing an optical fiber connection
CN102332197B (zh) * 2011-08-18 2013-10-09 黄力华 一种高精度光学安全保卫系统
US20130243367A1 (en) * 2012-03-16 2013-09-19 William Redvers Belisle Fiber Optic Turf Blade Contact and Movement Sensor
CN103617685B (zh) * 2013-12-09 2016-02-24 中国船舶重工集团公司第七〇五研究所 一种基于光纤振动传感报警系统的自学习算法
CN106051468A (zh) * 2016-06-08 2016-10-26 无锡亚天光电科技有限公司 一种分布式光纤管道安全预警系统的报警模式分析算法
KR101861321B1 (ko) * 2018-01-22 2018-05-28 주식회사 두리번테크 듀얼 펄스를 이용한 비상상황 모니터링 시스템
US11018778B1 (en) 2020-05-20 2021-05-25 Verizon Patent And Licensing Inc. System and method to prevent unauthorized voice detection via fiber links
US11611393B1 (en) * 2021-09-08 2023-03-21 Subcom, Llc Spatially resolved monitoring of cable perturbations using multichannel information

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342907A (en) * 1977-12-12 1982-08-03 Pedro B. Macedo Optical sensing apparatus and method
AU525304B2 (en) * 1978-06-13 1982-10-28 Amalgamated Wireless (Australasia) Limited Optical fibre communication links
US4299490A (en) * 1978-12-07 1981-11-10 Mcdonnell Douglas Corporation Phase nulling optical gyro
DE3176023D1 (en) * 1980-10-10 1987-04-23 Pilkington Perkin Elmer Ltd Intruder detection security system
US4375680A (en) * 1981-01-16 1983-03-01 Mcdonnell Douglas Corporation Optical acoustic sensor
US4775214A (en) * 1983-12-21 1988-10-04 Rosemount Inc. Wavelength coded resonant optical sensor
DK155238C (da) * 1985-09-06 1989-07-10 Nordiske Kabel Traad Fremgangsmaade ved signalbehandling af reflekteredeimpulser samt apparatur til udoevelse af fremgangsmaaden
US4775216A (en) * 1987-02-02 1988-10-04 Litton Systems, Inc. Fiber optic sensor array and method
GB8709900D0 (en) * 1987-04-27 1987-08-05 British Telecomm Surveillance system

Also Published As

Publication number Publication date
JPH06103857B2 (ja) 1994-12-14
AU4090689A (en) 1990-03-08
IL91463A (en) 1994-05-30
EP0364093B1 (en) 1995-08-02
ES2075052T3 (es) 1995-10-01
US4904050A (en) 1990-02-27
EP0364093A3 (en) 1991-04-24
CA1316235C (en) 1993-04-13
DE68923671D1 (de) 1995-09-07
DE68923671T2 (de) 1996-01-18
KR900003653A (ko) 1990-03-26
US4904050B1 (da) 1992-07-28
DK427189D0 (da) 1989-08-30
EP0364093A2 (en) 1990-04-18
AU598718B2 (en) 1990-06-28
HK34096A (en) 1996-03-08
JPH02119329A (ja) 1990-05-07
KR0139547B1 (en) 1998-07-01
IL91463A0 (en) 1990-04-29

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