EP1058853A1 - Device for measuring a current by means of a fibre-optic sagnac interferometer - Google Patents
Device for measuring a current by means of a fibre-optic sagnac interferometerInfo
- Publication number
- EP1058853A1 EP1058853A1 EP99904822A EP99904822A EP1058853A1 EP 1058853 A1 EP1058853 A1 EP 1058853A1 EP 99904822 A EP99904822 A EP 99904822A EP 99904822 A EP99904822 A EP 99904822A EP 1058853 A1 EP1058853 A1 EP 1058853A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- current
- fiber
- current measuring
- coil
- measuring
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
-
- 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
Definitions
- the measurement of large currents in the range of, for example, 1 kA to 65 kA with a center of gravity measuring range of about 10 kA is a technical problem if the bandwidth of the measuring frequency is to range from the DC range to, for example, 1 kHz, with a main load in the range of Mains frequency of 50 Hz.
- the invention provides, according to the definition of patent claim 1, a device for current measurement by means of a fiber-optic Sagnac interferometer, in whose light path, which is penetrated by two opposing partial light beams created by beam splitting of a light beam originating from a light source, a fiber-optic one Current measuring coil is used, which is penetrated by the current to be measured or a conductor carrying a proportional proportion of current, and according to the invention is characterized in that the structure of the fiber optic Sagnac interferometer corresponds to a fiber gyroscope with a closed control loop, in which the current measuring coil at least the sensor coil of the gyro partially replaced.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19808517 | 1998-02-27 | ||
DE1998108517 DE19808517A1 (en) | 1998-02-27 | 1998-02-27 | Current measurement device |
PCT/EP1999/000549 WO1999044070A1 (en) | 1998-02-27 | 1999-01-28 | Device for measuring a current by means of a fibre-optic sagnac interferometer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1058853A1 true EP1058853A1 (en) | 2000-12-13 |
Family
ID=7859233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99904822A Withdrawn EP1058853A1 (en) | 1998-02-27 | 1999-01-28 | Device for measuring a current by means of a fibre-optic sagnac interferometer |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1058853A1 (en) |
DE (1) | DE19808517A1 (en) |
WO (1) | WO1999044070A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10000306B4 (en) | 2000-01-05 | 2012-05-24 | Abb Research Ltd. | Fiber optic current sensor |
DE10044197B4 (en) * | 2000-09-07 | 2004-08-19 | Litef Gmbh | Method and device for electro-optical measurement of electrical voltage |
DE10112835B4 (en) * | 2001-03-16 | 2006-05-11 | Litef Gmbh | Method and device for current measurement by means of a fiber optic in-line Sagnac interferometer and suitable phase modulator |
DE10138154C2 (en) | 2001-08-03 | 2003-06-05 | Litef Gmbh | Method and device for increasing the long-term operational reliability of a fiber optic interferometer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3132414A1 (en) * | 1981-08-17 | 1983-02-24 | Ernst Dr. 5600 Wuppertal Brinkmeyer | Arrangement for separating backscattered light in systems having optical fibres |
DE3682680D1 (en) * | 1986-09-09 | 1992-01-09 | Litef Gmbh | METHOD FOR MEASURING RATE AND RATE SENSOR WITH FIBER OPTICAL SAGNAC INTERFEROMETER. |
FR2613838B1 (en) * | 1987-04-10 | 1990-11-16 | Alsthom | DEVICE FOR MEASURING THE INTENSITY OF AN ELECTRIC CURRENT BY FARADAY EFFECT IMPLEMENTED WITHIN A SAGNAC INTERFEROMETER |
FR2660996B1 (en) * | 1990-04-17 | 1992-08-07 | Photonetics | FIBER OPTIC MEASURING DEVICE, GYROMETER, NAVIGATION AND STABILIZATION UNIT, CURRENT SENSOR. |
-
1998
- 1998-02-27 DE DE1998108517 patent/DE19808517A1/en not_active Withdrawn
-
1999
- 1999-01-28 WO PCT/EP1999/000549 patent/WO1999044070A1/en not_active Application Discontinuation
- 1999-01-28 EP EP99904822A patent/EP1058853A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO9944070A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999044070A1 (en) | 1999-09-02 |
DE19808517A1 (en) | 1999-09-16 |
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Legal Events
Date | Code | Title | Description |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18D | Application deemed to be withdrawn |
Effective date: 20010706 |