WO2001006283A3 - Faser optic current sensor - Google Patents

Faser optic current sensor Download PDF

Info

Publication number
WO2001006283A3
WO2001006283A3 PCT/US2000/040376 US0040376W WO0106283A3 WO 2001006283 A3 WO2001006283 A3 WO 2001006283A3 US 0040376 W US0040376 W US 0040376W WO 0106283 A3 WO0106283 A3 WO 0106283A3
Authority
WO
WIPO (PCT)
Prior art keywords
region
sensing
light source
coil
sensing coil
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.)
Ceased
Application number
PCT/US2000/040376
Other languages
French (fr)
Other versions
WO2001006283A2 (en
Inventor
Sidney M Bennett
Richard B Dyott
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.)
KVH Industries Inc
Original Assignee
KVH Industries Inc
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 KVH Industries Inc filed Critical KVH Industries Inc
Priority to CA002380696A priority Critical patent/CA2380696A1/en
Priority to JP2001510864A priority patent/JP2003505670A/en
Priority to EP00960145A priority patent/EP1212624A2/en
Publication of WO2001006283A2 publication Critical patent/WO2001006283A2/en
Publication of WO2001006283A3 publication Critical patent/WO2001006283A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • G01R15/245—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)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

A reduced minimum configuration (RMC) fiber optic current sensor (FOCS) is proposed which includes a sensing coil or sensing region, a light source and an optical path arranged between the front output of the light source and the fiber optic sensing coil/region. At least one quarter wave plate is disposed between the optical path and the sensing coil/region for converting linearly polarized light beams into circularly polarized light beams propagating through the sensing coil/region. The circularly polarized light beams propagating through the sensing region experience a differential phase shift caused by a magnetic field or current flowing in a conductor proximate to the sensing coil. A light detector is located at the back output of the light source and produces an output signal in response to return light intensity transmitted through the light source. The return light intensity is a measure of the magnetic field in the sensor coil/region. The magnetic field may be produced by an electric current flowing through a wire, wherein the sensor coil can be wound around the wire. Electronics is described which minimizes effects caused by changes in the environmental conditions.
PCT/US2000/040376 1999-07-15 2000-07-13 Faser optic current sensor Ceased WO2001006283A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002380696A CA2380696A1 (en) 1999-07-15 2000-07-13 Reduced minimum configuration fiber opic current sensor
JP2001510864A JP2003505670A (en) 1999-07-15 2000-07-13 Optical fiber current sensor reduced to minimum configuration
EP00960145A EP1212624A2 (en) 1999-07-15 2000-07-13 Fiber optic current sensor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US14384799P 1999-07-15 1999-07-15
US60/143,847 1999-07-15
US45943899A 1999-12-13 1999-12-13
US09/459,438 1999-12-13

Publications (2)

Publication Number Publication Date
WO2001006283A2 WO2001006283A2 (en) 2001-01-25
WO2001006283A3 true WO2001006283A3 (en) 2001-05-03

Family

ID=26841458

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/040376 Ceased WO2001006283A2 (en) 1999-07-15 2000-07-13 Faser optic current sensor

Country Status (1)

Country Link
WO (1) WO2001006283A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571650A (en) * 1982-09-07 1986-02-18 Hitachi, Ltd. Magneto-optic information storage system utilizing a self-coupled laser
EP0856737A1 (en) * 1997-01-29 1998-08-05 Abb Research Ltd. Magneto optical current sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571650A (en) * 1982-09-07 1986-02-18 Hitachi, Ltd. Magneto-optic information storage system utilizing a self-coupled laser
EP0856737A1 (en) * 1997-01-29 1998-08-05 Abb Research Ltd. Magneto optical current sensor

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DUPRAZ: "Fiber-Optic Interferometers for Current Measurement: Principles and Technology", ALSTHOM REVIEW, no. 9, December 1987 (1987-12-01), Paris, France, pages 29 - 44, XP002156539 *
FROSIO G ET AL: "RECIPROCAL REFLECTION INTERFEROMETER FOR A FIBER-OPTIC FARADAY CURRENT SENSOR", APPLIED OPTICS,US,OPTICAL SOCIETY OF AMERICA,WASHINGTON, vol. 33, no. 25, 1 September 1994 (1994-09-01), pages 6111 - 6122, XP000473296, ISSN: 0003-6935 *
SHORT S X ET AL: "ELIMINATION OF BIREFRINGENCE INDUCED SCALE FACTOR ERRORS IN THE IN-LINE SAGNAC INTERFEROMETER CURRENT SENSOR", JOURNAL OF LIGHTWAVE TECHNOLOGY,US,IEEE. NEW YORK, vol. 16, no. 10, 1 October 1998 (1998-10-01), pages 1844 - 1850, XP000793320, ISSN: 0733-8724 *

Also Published As

Publication number Publication date
WO2001006283A2 (en) 2001-01-25

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