DK427189A - Lyslederovervaagningssystem og fremgangsmaade til at overvaage en lysleder - Google Patents
Lyslederovervaagningssystem og fremgangsmaade til at overvaage en lyslederInfo
- 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
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)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Computer Security & Cryptography (AREA)
- Burglar Alarm Systems (AREA)
- Optical Communication System (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Light Guides In General And Applications Therefor (AREA)
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 (xx) |
EP (1) | EP0364093B1 (xx) |
JP (1) | JPH06103857B2 (xx) |
KR (1) | KR0139547B1 (xx) |
AU (1) | AU598718B2 (xx) |
CA (1) | CA1316235C (xx) |
DE (1) | DE68923671T2 (xx) |
DK (1) | DK427189A (xx) |
ES (1) | ES2075052T3 (xx) |
HK (1) | HK34096A (xx) |
IL (1) | IL91463A (xx) |
Families Citing this family (44)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
AU2001293535B2 (en) * | 2000-09-05 | 2006-05-18 | Fieldturf Tarkett Inc. | Artificial grass for landscaping |
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 |
US7848645B2 (en) | 2004-09-30 | 2010-12-07 | 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 |
JP4782798B2 (ja) | 2004-12-17 | 2011-09-28 | ブリティッシュ・テレコミュニケーションズ・パブリック・リミテッド・カンパニー | ネットワークの評価 |
GB0427733D0 (en) | 2004-12-17 | 2005-01-19 | British Telecomm | Optical system |
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 |
DE602007013874D1 (de) | 2006-02-24 | 2011-05-26 | British Telecomm | Erfassen einer störung |
EP1826924A1 (en) | 2006-02-24 | 2007-08-29 | BRITISH TELECOMMUNICATIONS public limited company | Sensing a disturbance |
EP1987317B1 (en) | 2006-02-24 | 2013-07-17 | BRITISH TELECOMMUNICATIONS public limited company | Sensing a disturbance |
CN101410696B (zh) | 2006-04-03 | 2011-01-05 | 英国电讯有限公司 | 干扰位置的估计 |
CA2667360A1 (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 |
US9784642B2 (en) | 2008-09-23 | 2017-10-10 | Onesubsea Ip Uk 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)
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 |
-
1988
- 1988-08-31 US US07/238,810 patent/US4904050A/en not_active Expired - Lifetime
-
1989
- 1989-08-24 EP EP89308620A patent/EP0364093B1/en not_active Expired - Lifetime
- 1989-08-24 ES ES89308620T patent/ES2075052T3/es not_active Expired - Lifetime
- 1989-08-24 DE DE68923671T patent/DE68923671T2/de not_active Expired - Fee Related
- 1989-08-24 CA CA000609315A patent/CA1316235C/en not_active Expired - Fee Related
- 1989-08-29 JP JP1220514A patent/JPH06103857B2/ja not_active Expired - Lifetime
- 1989-08-29 IL IL9146389A patent/IL91463A/en not_active IP Right Cessation
- 1989-08-30 AU AU40906/89A patent/AU598718B2/en not_active Ceased
- 1989-08-30 KR KR89012383A patent/KR0139547B1/ko not_active IP Right Cessation
- 1989-08-30 DK DK427189A patent/DK427189A/da not_active Application Discontinuation
-
1996
- 1996-02-29 HK HK34096A patent/HK34096A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR0139547B1 (en) | 1998-07-01 |
US4904050B1 (xx) | 1992-07-28 |
CA1316235C (en) | 1993-04-13 |
DE68923671T2 (de) | 1996-01-18 |
JPH02119329A (ja) | 1990-05-07 |
KR900003653A (ko) | 1990-03-26 |
DK427189D0 (da) | 1989-08-30 |
IL91463A0 (en) | 1990-04-29 |
EP0364093A3 (en) | 1991-04-24 |
AU4090689A (en) | 1990-03-08 |
JPH06103857B2 (ja) | 1994-12-14 |
AU598718B2 (en) | 1990-06-28 |
EP0364093B1 (en) | 1995-08-02 |
US4904050A (en) | 1990-02-27 |
EP0364093A2 (en) | 1990-04-18 |
ES2075052T3 (es) | 1995-10-01 |
DE68923671D1 (de) | 1995-09-07 |
HK34096A (en) | 1996-03-08 |
IL91463A (en) | 1994-05-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AHS | Application shelved for other reasons than non-payment |