AU2003204491A1 - Optic fiber current sensor, comprising several sensing heads - Google Patents
Optic fiber current sensor, comprising several sensing headsInfo
- Publication number
- AU2003204491A1 AU2003204491A1 AU2003204491A AU2003204491A AU2003204491A1 AU 2003204491 A1 AU2003204491 A1 AU 2003204491A1 AU 2003204491 A AU2003204491 A AU 2003204491A AU 2003204491 A AU2003204491 A AU 2003204491A AU 2003204491 A1 AU2003204491 A1 AU 2003204491A1
- Authority
- AU
- Australia
- Prior art keywords
- modulation
- sensing heads
- phase
- optic fiber
- fiber current
- 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.)
- Abandoned
Links
Classifications
-
- 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
- G01R15/247—Details of the circuitry or construction of devices covered by G01R15/241 - G01R15/246
-
- 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
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measuring Magnetic Variables (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention concerns an optic fiber current and magnetic field sensor, comprising several sensing heads (H), and a corresponding measurement method. Said sensor includes: a light source (1); N >/= 2 sensing heads (H); at least a phase modulation unit (PME) including at least a phase modulator (PM); a detector (2) a control and evaluation unit (5). The phase modulation unit (PME) is optically connected to at least one of the sensing heads (H) and enables differential and non-reciprocal phase modulation of linearly polarized light waves. N modulation amplitudes phi 0,n and N modulation frequencies nu n are provided for the differential and non-reciprocal phase modulations. The modulation frequencies nu n and two positive integers p, q with p q, capable of being pre-allocated, are selected such that, for all the positive integers n, m with n m and 1 </= n, m </= N: P. NUn z. nu m and q. nu n nu m.The modulation amplitudes phi 0,n and the modulation frequencies nu n are selected on the basis of the modulation-relevant optical path lengths ln. The invention enables to obtain a better signal-to-noise ratio.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2003/000109 WO2003042708A2 (en) | 2003-02-14 | 2003-02-14 | Optic fiber current sensor, comprising several sensing heads |
Publications (1)
Publication Number | Publication Date |
---|---|
AU2003204491A1 true AU2003204491A1 (en) | 2003-05-26 |
Family
ID=4358284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2003204491A Abandoned AU2003204491A1 (en) | 2003-02-14 | 2003-02-14 | Optic fiber current sensor, comprising several sensing heads |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1597599B1 (en) |
CN (1) | CN100344978C (en) |
AT (1) | ATE365330T1 (en) |
AU (1) | AU2003204491A1 (en) |
CA (1) | CA2515409A1 (en) |
DE (1) | DE50307538D1 (en) |
WO (1) | WO2003042708A2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007121592A1 (en) * | 2006-04-25 | 2007-11-01 | Abb Research Ltd | Fiber-optic current sensor with polarimetric detection scheme |
CN101937012A (en) * | 2010-08-20 | 2011-01-05 | 中国西电电气股份有限公司 | Trinomial all-fiber current transformer |
CN101957399B (en) * | 2010-09-21 | 2014-04-30 | 中国电力科学研究院 | Digital closed loop type optical fiber current sensor |
CN102353833B (en) * | 2011-07-08 | 2014-03-05 | 福建师范大学 | Annular cavity all-fiber current sensor capability of eliminating temperature sensitivity |
CN102539883A (en) * | 2011-12-16 | 2012-07-04 | 西安交通大学 | Solenoid nesting type all-fiber current sensor |
CN107884611A (en) * | 2016-09-30 | 2018-04-06 | 南京南瑞继保电气有限公司 | A kind of polycyclic all-fiber current transformator |
JP7300673B2 (en) | 2019-07-31 | 2023-06-30 | シチズンファインデバイス株式会社 | Interferometric optical magnetic field sensor device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62272158A (en) * | 1986-05-20 | 1987-11-26 | Ngk Insulators Ltd | Voltage detector |
DE10000306B4 (en) * | 2000-01-05 | 2012-05-24 | Abb Research Ltd. | Fiber optic current sensor |
DE10021669A1 (en) * | 2000-05-05 | 2001-11-08 | Abb Research Ltd | Fiber optic current sensor |
EP1245961A3 (en) * | 2001-03-19 | 2003-04-23 | Siemens Aktiengesellschaft | Stabilized magneto-optic current measuring device |
-
2003
- 2003-02-14 EP EP03714519A patent/EP1597599B1/en not_active Expired - Lifetime
- 2003-02-14 CN CNB038259672A patent/CN100344978C/en not_active Expired - Fee Related
- 2003-02-14 AT AT03714519T patent/ATE365330T1/en not_active IP Right Cessation
- 2003-02-14 AU AU2003204491A patent/AU2003204491A1/en not_active Abandoned
- 2003-02-14 CA CA002515409A patent/CA2515409A1/en not_active Abandoned
- 2003-02-14 DE DE50307538T patent/DE50307538D1/en not_active Expired - Lifetime
- 2003-02-14 WO PCT/CH2003/000109 patent/WO2003042708A2/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
ATE365330T1 (en) | 2007-07-15 |
WO2003042708A2 (en) | 2003-05-22 |
CA2515409A1 (en) | 2003-05-22 |
EP1597599B1 (en) | 2007-06-20 |
DE50307538D1 (en) | 2007-08-02 |
CN100344978C (en) | 2007-10-24 |
WO2003042708A3 (en) | 2004-02-26 |
EP1597599A2 (en) | 2005-11-23 |
CN1742207A (en) | 2006-03-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK6 | Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase |