CA2347749C - Fiber optic current sensor - Google Patents
Fiber optic current sensor Download PDFInfo
- Publication number
- CA2347749C CA2347749C CA002347749A CA2347749A CA2347749C CA 2347749 C CA2347749 C CA 2347749C CA 002347749 A CA002347749 A CA 002347749A CA 2347749 A CA2347749 A CA 2347749A CA 2347749 C CA2347749 C CA 2347749C
- Authority
- CA
- Canada
- Prior art keywords
- sensor
- fiber
- polarization
- coil
- sensing fiber
- 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.)
- Expired - Fee Related
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 90
- 230000010287 polarization Effects 0.000 claims abstract description 57
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 5
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000012423 maintenance Methods 0.000 claims abstract 2
- 230000003287 optical effect Effects 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 abstract description 11
- 239000013307 optical fiber Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 230000010363 phase shift Effects 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 206010014405 Electrocution Diseases 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000002019 doping agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/032—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect
- G01R33/0322—Measuring direction or magnitude of magnetic fields or magnetic flux using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect using the Faraday or Voigt effect
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
- G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Gas-Insulated Switchgears (AREA)
- Measuring Magnetic Variables (AREA)
- Glass Compositions (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/183,977 | 1998-10-31 | ||
| US09/183,977 US6188811B1 (en) | 1998-10-31 | 1998-10-31 | Fiber optic current sensor |
| PCT/US1999/023945 WO2000026682A1 (en) | 1998-10-31 | 1999-10-13 | Fiber optic current sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2347749A1 CA2347749A1 (en) | 2000-05-11 |
| CA2347749C true CA2347749C (en) | 2008-12-16 |
Family
ID=22675103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002347749A Expired - Fee Related CA2347749C (en) | 1998-10-31 | 1999-10-13 | Fiber optic current sensor |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6188811B1 (enExample) |
| EP (1) | EP1133703B1 (enExample) |
| JP (1) | JP2002529709A (enExample) |
| AT (1) | ATE272221T1 (enExample) |
| BR (1) | BR9914931B1 (enExample) |
| CA (1) | CA2347749C (enExample) |
| DE (1) | DE69919021T2 (enExample) |
| WO (1) | WO2000026682A1 (enExample) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2437106C2 (ru) * | 2009-12-29 | 2011-12-20 | Закрытое акционерное общество "Профотек" | Волоконно-оптический датчик тока |
| CN102401730A (zh) * | 2011-11-21 | 2012-04-04 | 北京交通大学 | 一种自组织光纤光缆识别仪 |
| CN102650524A (zh) * | 2012-04-25 | 2012-08-29 | 北京航空航天大学 | 一种基于宽谱光源双折射调制的差分双干涉式闭环光纤陀螺仪 |
| CN102721853A (zh) * | 2012-07-02 | 2012-10-10 | 昆明理工大学 | 基于罗氏线圈的光纤Bragg光栅电压传感器 |
| RU2497135C1 (ru) * | 2012-05-18 | 2013-10-27 | Закрытое акционерное общество "Профотек" | Способ и волоконно-оптическое устройство (варианты) для измерения величины электрического тока и магнитного поля |
Families Citing this family (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2784456B1 (fr) * | 1998-10-09 | 2000-12-08 | Sextant Avionique | Dispositif de mesure de distance a effet magneto-optique et chaine de mesure incorporant ce dispositif |
| US6891622B2 (en) * | 1999-02-11 | 2005-05-10 | Kvh Industries, Inc. | Current sensor |
| ATE265049T1 (de) | 2000-02-28 | 2004-05-15 | Kvh Ind Inc | Faraday-effekt-stromsonde mit verbesserter schwingungsreaktion |
| AU2002217751A1 (en) * | 2000-08-02 | 2002-03-26 | Kvh Industries, Inc. | Decreasing the effects of linear birefringence in a fiber-optic sensor by use of berry's topological phase |
| US6630819B2 (en) * | 2001-02-22 | 2003-10-07 | The University Of Chicago | Magneto-optic current sensor |
| US6836334B2 (en) * | 2001-10-31 | 2004-12-28 | Kvh Industries, Inc. | Angle random walk (ARW) noise reduction in fiber optic sensors using an optical amplifier |
| US6748127B2 (en) | 2002-03-13 | 2004-06-08 | Agilent Technologies, Inc. | Transmission of orthogonal circular polarizations on a fiber |
| US6763153B2 (en) * | 2002-04-17 | 2004-07-13 | Kvh Industries, Inc. | Apparatus and method for electronic RIN reduction in fiber-optic sensors utilizing filter with group delay |
| US7206468B2 (en) * | 2004-08-17 | 2007-04-17 | Huang Hung-Chia | Broad-band fiber-optic wave plates |
| KR100659564B1 (ko) | 2004-08-21 | 2006-12-19 | 일진전기 주식회사 | 광 전류센서 |
| US7277179B2 (en) * | 2004-12-13 | 2007-10-02 | General Electric Company | Magneto-optical sensors |
| DE102005043322B4 (de) * | 2005-09-12 | 2015-03-19 | AREVA T&D Inc. Corp. | Faseroptischer Stromsensor |
| US7633285B2 (en) * | 2006-07-31 | 2009-12-15 | Nxtphase T&D Corporation | Sensors and sensing methods for three-phase, gas insulated devices |
| US8890508B2 (en) * | 2007-05-04 | 2014-11-18 | Alstom Technology Ltd | Adaptive filters for fiber optic sensors |
| US7492977B2 (en) * | 2007-06-14 | 2009-02-17 | Yong Huang | All-fiber current sensor |
| US7679753B2 (en) * | 2007-06-26 | 2010-03-16 | Huang Hung-Chia | Passively biased fiber-optic gyroscope and current sensor |
| JP2010025766A (ja) * | 2008-07-18 | 2010-02-04 | Tokyo Electric Power Co Inc:The | 光ファイバ電流センサ、電流測定方法、及び事故区間検出装置 |
| CA2758452C (en) | 2009-04-14 | 2020-08-04 | Alstom Grid Inc. | Folding high voltage insulating column |
| JP5756966B2 (ja) * | 2009-05-21 | 2015-07-29 | アダマンド株式会社 | 電流測定装置 |
| US20110052115A1 (en) * | 2009-08-27 | 2011-03-03 | General Electric Company | System and method for temperature control and compensation for fiber optic current sensing systems |
| CN102753986B (zh) | 2009-09-11 | 2015-10-07 | 阿尔斯通技术有限公司 | 用于差动保护方案的主-从光纤电流传感器 |
| US8395372B2 (en) * | 2009-10-28 | 2013-03-12 | Optisense Network, Llc | Method for measuring current in an electric power distribution system |
| US9134344B2 (en) | 2009-10-28 | 2015-09-15 | Gridview Optical Solutions, Llc. | Optical sensor assembly for installation on a current carrying cable |
| CN102687025B (zh) * | 2009-12-11 | 2015-07-29 | Abb技术有限公司 | 具有改进断电性能的磁光电流换能器 |
| RU2451941C1 (ru) * | 2010-12-27 | 2012-05-27 | Открытое акционерное общество "Научно-исследовательский институт оптико-электронного приборостроения" (ОАО "НИИ ОЭП") | Волоконно-оптический измерительный преобразователь тока |
| TWI436068B (zh) * | 2011-04-01 | 2014-05-01 | Delta Electronics Inc | 被動式交流電流感測器 |
| CN102426280B (zh) * | 2011-10-19 | 2013-07-17 | 上海大学 | 反射式萨格奈克干涉型光纤电流传感器 |
| CN102608380B (zh) * | 2012-02-29 | 2013-12-11 | 曲阜师范大学 | 自感应光电混合式电流互感器 |
| CN102721460A (zh) * | 2012-05-29 | 2012-10-10 | 北京航空航天大学 | 一种具有准互易光路的光纤水听器 |
| JP6450908B2 (ja) * | 2013-03-07 | 2019-01-16 | アダマンド並木精密宝石株式会社 | 電流測定装置 |
| CN103777062B (zh) * | 2013-12-13 | 2017-01-25 | 国家电网公司 | 一种干涉环式全光纤电流互感器 |
| GB2538387B (en) | 2013-12-18 | 2020-07-29 | Halliburton Energy Services Inc | Fiber optic current monitoring for electromagnetic ranging |
| CN103954827A (zh) * | 2014-04-03 | 2014-07-30 | 易能乾元(北京)电力科技有限公司 | 一种光学电流传感器 |
| RU2567116C1 (ru) * | 2014-06-17 | 2015-11-10 | Закрытое акционерное общество "Профотек" | Волоконно-оптический чувствительный элемент датчика электрического тока и магнитного поля |
| DE202014009595U1 (de) | 2014-11-21 | 2016-02-23 | Alstom Technology Ltd. | Digitaler Messwandler |
| EP3104183A1 (en) | 2015-06-10 | 2016-12-14 | Lumiker Aplicaciones Tecnologicas S.L. | Current measuring equipment based on optical fiber for measuring the current circulating through a conductor and the associated method |
| CN106199125B (zh) * | 2016-07-11 | 2019-01-15 | 国网北京经济技术研究院 | 一种新型全光纤电流互感器及其调制解调方法 |
| RU170319U1 (ru) * | 2016-07-28 | 2017-04-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уфимский государственный нефтяной технический университет" | Волоконно-оптическое информационно-измерительное устройство электрического тока и магнитного поля |
| CN109752581B (zh) * | 2019-03-14 | 2024-07-12 | 北京交通大学 | 偏振检偏式闭环全光纤电流互感器 |
| WO2023158335A1 (ru) * | 2022-02-15 | 2023-08-24 | Общество с ограниченной ответственностью "Научно-Производственный центр "Профотек" | Волоконно-оптический датчик электрических токов мегаамперного диапазона |
| CN115638782B (zh) * | 2022-11-03 | 2024-04-09 | 哈尔滨工业大学 | 一种基于圆偏振光传输抑制光纤环热致误差的干涉式光纤陀螺 |
| CN117405961B (zh) * | 2023-12-15 | 2024-03-15 | 华中科技大学 | 一种光路微差量程等效与反馈自补偿的光纤电流测量系统 |
| JP2025127696A (ja) * | 2024-02-21 | 2025-09-02 | シチズンファインデバイス株式会社 | 磁界センサ装置 |
Family Cites Families (43)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3605013A (en) * | 1968-11-16 | 1971-09-14 | Nippon Selfoc Co Ltd | Current-measuring system utilizing faraday effect element |
| CH512076A (de) | 1970-02-04 | 1971-08-31 | Bbc Brown Boveri & Cie | Magnetfeldsonde |
| US3746983A (en) * | 1970-07-20 | 1973-07-17 | Transformatoren Union Ag | Apparatus fur measuring very high currents particularly direct currents |
| DE2835794C3 (de) | 1978-08-16 | 1987-12-03 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften eV, 3400 Göttingen | Faseroptische Anordnung zur Messung der Stärke eines elektrischen Stromes |
| US4372685A (en) | 1979-01-15 | 1983-02-08 | Max-Planck-Gesellschaft Zur Forderung Der Wissenschaften E.V. | Method and arrangement for the measurement of rotations |
| US4456376A (en) | 1981-04-06 | 1984-06-26 | Lear Siegler, Inc. | Optical rate sensor |
| US4615582A (en) | 1981-11-09 | 1986-10-07 | The Board Of Trustees Of The Leland Stanford Junior University | Magneto-optic rotator for providing additive Faraday rotations in a loop of optical fiber |
| US4733938A (en) | 1981-11-09 | 1988-03-29 | The Board Of Trustees Of The Leland Stanford Junior University | Magneto-optic rotator |
| US4545682A (en) | 1983-08-11 | 1985-10-08 | The Singer Company | Optical gyroscope |
| US4578639A (en) | 1984-03-02 | 1986-03-25 | Westinghouse Electric Corp. | Metering system for measuring parameters of high AC electric energy flowing in an electric conductor |
| US4613811A (en) | 1984-09-04 | 1986-09-23 | Westinghouse Electric Corp. | Faraday current sensor with fiber optic compensated by temperature, degradation, and linearity |
| GB8612190D0 (en) | 1986-05-20 | 1986-07-16 | Qian J R | Optical fibre apparatus |
| CH671638A5 (en) | 1986-09-05 | 1989-09-15 | Bbc Brown Boveri & Cie | Optical fibre current transducer using Sagnac interferometer - has two polarised partial beams fed through current sensor coil in opposing directions |
| US4779975A (en) | 1987-06-25 | 1988-10-25 | The Board Of Trustees Of The Leland Stanford Junior University | Interferometric sensor using time domain measurements |
| US4894608A (en) | 1987-07-22 | 1990-01-16 | Square D Company | Electric current sensor using the faraday effect |
| US4947107A (en) | 1988-06-28 | 1990-08-07 | Sundstrand Corporation | Magneto-optic current sensor |
| US5297436A (en) | 1988-07-20 | 1994-03-29 | Commonwealth Scientific And Industrial Research Organization | Optical fibre ultrasonic sensor |
| EP0400197B1 (de) | 1989-06-02 | 1993-10-06 | LITEF GmbH | Verfahren und Einrichtung zur Demodulation des Drehratensignals eines Faserkreisels |
| US4973899A (en) | 1989-08-24 | 1990-11-27 | Sundstrand Corporation | Current sensor and method utilizing multiple layers of thin film magneto-optic material and signal processing to make the output independent of system losses |
| US5034679A (en) | 1989-12-14 | 1991-07-23 | Sundstrand Corporation | Polarization feedback control of polarization rotating sensor |
| US5051577A (en) | 1990-03-20 | 1991-09-24 | Minnesota Mining And Manufacturing Company | Faraday effect current sensor having two polarizing fibers at an acute angle |
| FR2660996B1 (fr) | 1990-04-17 | 1992-08-07 | Photonetics | Dispositif de mesure a fibre optique, gyrometre, centrale de navigation et de stabilisation, capteur de courant. |
| US5056885A (en) | 1990-05-10 | 1991-10-15 | General Electric Company | Fiber optic switch |
| FR2662245B1 (fr) | 1990-05-18 | 1994-05-20 | Photonetics | Dispositif de mesure a fibre optique, gyrometre, centrale de stabilisation et capteur de courant ou de champ magnetique. |
| US5157461A (en) | 1990-06-14 | 1992-10-20 | Smiths Industries Aerospace & Defense Systems Inc. | Interface configuration for rate sensor apparatus |
| US5063290A (en) | 1990-09-14 | 1991-11-05 | The United States Of America As Represented By The Secretary Of The Navy | All-optical fiber faraday rotation current sensor with heterodyne detection technique |
| US5677622A (en) | 1991-12-24 | 1997-10-14 | The University Of Sydney | Current sensor using a Sagnac interferometer and spun, single mode birefringent optical fiber to detect current via the Faraday effect |
| US5400418A (en) | 1992-12-04 | 1995-03-21 | Williams Telecommunication Group, Inc. | Polarization independent all-fiber optical circulator |
| JPH06307875A (ja) | 1993-02-24 | 1994-11-04 | Sumitomo Electric Ind Ltd | 信号検出方法及び位相変調度変動の検出方法 |
| US5463312A (en) | 1994-03-03 | 1995-10-31 | Minnesota Mining And Manufacturing Company | Faraday-effect sensing coil with stable birefringence |
| US5434501A (en) | 1994-04-29 | 1995-07-18 | The United States Of America As Represented By The Secretary Of The Navy | Polarization insensitive current and magnetic field optic sensor |
| US5598489A (en) | 1994-07-27 | 1997-01-28 | Litton Systems, Inc. | Depolarized fiber optic rotation sensor with low faraday effect drift |
| US5587791A (en) * | 1994-09-27 | 1996-12-24 | Citeq | Optical interferometric current sensor and method using a single mode birefringent waveguide and a pseudo-depolarizer for measuring electrical current |
| US5644397A (en) | 1994-10-07 | 1997-07-01 | The Texas A&M University System | Fiber optic interferometric circuit and magnetic field sensor |
| JP3231213B2 (ja) * | 1995-04-04 | 2001-11-19 | 松下電器産業株式会社 | 光センサ装置及びその製造方法 |
| DE19517128A1 (de) | 1995-05-10 | 1996-11-14 | Siemens Ag | Verfahren und Anordnung zum Messen eines magnetischen Wechselfeldes mit Off-set-Faraday-Rotation zur Temperaturkompensation |
| DE69608461T2 (de) * | 1995-10-04 | 2001-01-18 | Minnesota Mining And Mfg. Co., Saint Paul | Stromfühler mit kompensation für die temperaturabhängigkeit der verdet-konstante |
| US5729005A (en) * | 1996-07-12 | 1998-03-17 | Minnesota Mining And Manufacturing Company | Fiber optic current sensor with bend birefringence compensation |
| US5696858A (en) | 1996-08-01 | 1997-12-09 | The Texas A&M University System | Fiber Optics apparatus and method for accurate current sensing |
| US5987195A (en) * | 1996-08-01 | 1999-11-16 | The Texas A&M University System | Fiber optics apparatus and method for accurate current sensing |
| US5935292A (en) * | 1997-01-08 | 1999-08-10 | 3M Innovative Properties Company | Annealing mold and retainer for making a fiber optic current sensor |
| US6023331A (en) | 1997-06-19 | 2000-02-08 | The Texas A&M University System | Fiber optic interferometric sensor and method by adding controlled amounts of circular birefringence in the sensing fiber |
| US5978084A (en) | 1997-08-26 | 1999-11-02 | The Texas A&M University System | Open loop signal processing circuit and method for a fiber optic interferometric sensor |
-
1998
- 1998-10-31 US US09/183,977 patent/US6188811B1/en not_active Expired - Lifetime
-
1999
- 1999-10-13 DE DE69919021T patent/DE69919021T2/de not_active Expired - Lifetime
- 1999-10-13 EP EP99971516A patent/EP1133703B1/en not_active Expired - Lifetime
- 1999-10-13 AT AT99971516T patent/ATE272221T1/de not_active IP Right Cessation
- 1999-10-13 BR BRPI9914931-1A patent/BR9914931B1/pt not_active IP Right Cessation
- 1999-10-13 JP JP2000580012A patent/JP2002529709A/ja active Pending
- 1999-10-13 CA CA002347749A patent/CA2347749C/en not_active Expired - Fee Related
- 1999-10-13 WO PCT/US1999/023945 patent/WO2000026682A1/en not_active Ceased
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2437106C2 (ru) * | 2009-12-29 | 2011-12-20 | Закрытое акционерное общество "Профотек" | Волоконно-оптический датчик тока |
| CN102401730A (zh) * | 2011-11-21 | 2012-04-04 | 北京交通大学 | 一种自组织光纤光缆识别仪 |
| CN102650524A (zh) * | 2012-04-25 | 2012-08-29 | 北京航空航天大学 | 一种基于宽谱光源双折射调制的差分双干涉式闭环光纤陀螺仪 |
| CN102650524B (zh) * | 2012-04-25 | 2014-10-15 | 北京航空航天大学 | 一种基于宽谱光源双折射调制的差分双干涉式闭环光纤陀螺仪 |
| RU2497135C1 (ru) * | 2012-05-18 | 2013-10-27 | Закрытое акционерное общество "Профотек" | Способ и волоконно-оптическое устройство (варианты) для измерения величины электрического тока и магнитного поля |
| CN102721853A (zh) * | 2012-07-02 | 2012-10-10 | 昆明理工大学 | 基于罗氏线圈的光纤Bragg光栅电压传感器 |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2347749A1 (en) | 2000-05-11 |
| DE69919021T2 (de) | 2005-07-28 |
| JP2002529709A (ja) | 2002-09-10 |
| EP1133703B1 (en) | 2004-07-28 |
| WO2000026682A1 (en) | 2000-05-11 |
| EP1133703A1 (en) | 2001-09-19 |
| ATE272221T1 (de) | 2004-08-15 |
| BR9914931A (pt) | 2001-11-06 |
| DE69919021D1 (de) | 2004-09-02 |
| BR9914931B1 (pt) | 2013-04-02 |
| US6188811B1 (en) | 2001-02-13 |
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Effective date: 20171013 |