AU2003204491A1 - Optic fiber current sensor, comprising several sensing heads - Google Patents

Optic fiber current sensor, comprising several sensing heads

Info

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
Application number
AU2003204491A
Inventor
Klaus Bohnert
Hubert Brandle
Philippe Gabus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Research Ltd Switzerland
Original Assignee
ABB Research Ltd Sweden
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 ABB Research Ltd Sweden filed Critical ABB Research Ltd Sweden
Publication of AU2003204491A1 publication Critical patent/AU2003204491A1/en
Abandoned legal-status Critical Current

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.
AU2003204491A 2003-02-14 2003-02-14 Optic fiber current sensor, comprising several sensing heads Abandoned AU2003204491A1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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