JPS56112657A - Measuring device for current - Google Patents
Measuring device for currentInfo
- Publication number
- JPS56112657A JPS56112657A JP1680980A JP1680980A JPS56112657A JP S56112657 A JPS56112657 A JP S56112657A JP 1680980 A JP1680980 A JP 1680980A JP 1680980 A JP1680980 A JP 1680980A JP S56112657 A JPS56112657 A JP S56112657A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- double
- axis
- constitution
- compensating plate
- 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.)
- Granted
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 Magnetic Variables (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
PURPOSE:To perform compensation of temperature with a simple constitution by using a magnetic optical material having Faraday effect and a double-refraction material whose refractive index changes in accordance with ambient temperature. CONSTITUTION:Between a polarizer 1 and a detector 2 which are arranged with the transmitting polarizing axes inclined at an angle of 45 deg. to each other are arranged the magnetic optical material 3 having Faraday effect and the temperature compensating plate 4 composed of the double-refraction material having an optical axis (axis C) 7 within the surface thereof in such a manner that the optical axis 7 is in accord with the transmitting polarizing axis of the polarizer 1. By this constitution, when the Faraday rotational angle of the magnetic optical material 3 is changed according to temperature, the double-refraction ratio of the temperature compensating plate 4 is also changed in accordance with the temperature and incident streight-line polarization is converted to elliptie polarization, whereby the temperature compensation of the magnetic optical material 3 is conducted. As the temperature compensating plate 4, guarts cut in parallel to the optical axis 7, as well as ferroelectric crystal such as LiNbO3, LiTeO3 and NH2PO4, is preferable.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1680980A JPS56112657A (en) | 1980-02-13 | 1980-02-13 | Measuring device for current |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1680980A JPS56112657A (en) | 1980-02-13 | 1980-02-13 | Measuring device for current |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56112657A true JPS56112657A (en) | 1981-09-05 |
JPH0137697B2 JPH0137697B2 (en) | 1989-08-09 |
Family
ID=11926472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1680980A Granted JPS56112657A (en) | 1980-02-13 | 1980-02-13 | Measuring device for current |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56112657A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57184974A (en) * | 1981-05-09 | 1982-11-13 | Mitsubishi Electric Corp | Photo measuring device |
JPS58129372A (en) * | 1982-01-29 | 1983-08-02 | Sumitomo Electric Ind Ltd | Magnetic field-light converter |
JPS58191978A (en) * | 1982-05-01 | 1983-11-09 | Ko Taketomi | Magnetic field-electric signal conversion method and device utilizing double refractive index of magnetic fluid to light |
JPS5927266A (en) * | 1982-08-05 | 1984-02-13 | Hitachi Cable Ltd | Current measuring apparatus using polarization plane-preserving optical fiber |
JPH0474972A (en) * | 1990-07-16 | 1992-03-10 | Kyodo Denki Kenkyusho:Kk | Optical inspection method and apparatus for printed circuit board |
EP1115000A2 (en) * | 2000-01-05 | 2001-07-11 | Abb Research Ltd. | Fibre optic current sensor |
EP1804066A1 (en) * | 2004-08-25 | 2007-07-04 | The Tokyo Electric Power Company Incorporated | Method for reducing temperature-dependent error in photocurrent sensor, and photocurrent sensor device |
-
1980
- 1980-02-13 JP JP1680980A patent/JPS56112657A/en active Granted
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57184974A (en) * | 1981-05-09 | 1982-11-13 | Mitsubishi Electric Corp | Photo measuring device |
JPH0373821B2 (en) * | 1981-05-09 | 1991-11-25 | ||
JPS58129372A (en) * | 1982-01-29 | 1983-08-02 | Sumitomo Electric Ind Ltd | Magnetic field-light converter |
JPH0475470B2 (en) * | 1982-01-29 | 1992-11-30 | ||
JPS58191978A (en) * | 1982-05-01 | 1983-11-09 | Ko Taketomi | Magnetic field-electric signal conversion method and device utilizing double refractive index of magnetic fluid to light |
JPS5927266A (en) * | 1982-08-05 | 1984-02-13 | Hitachi Cable Ltd | Current measuring apparatus using polarization plane-preserving optical fiber |
JPH0474972A (en) * | 1990-07-16 | 1992-03-10 | Kyodo Denki Kenkyusho:Kk | Optical inspection method and apparatus for printed circuit board |
EP1115000A2 (en) * | 2000-01-05 | 2001-07-11 | Abb Research Ltd. | Fibre optic current sensor |
EP1115000A3 (en) * | 2000-01-05 | 2004-03-17 | Abb Research Ltd. | Fibre optic current sensor |
EP1804066A1 (en) * | 2004-08-25 | 2007-07-04 | The Tokyo Electric Power Company Incorporated | Method for reducing temperature-dependent error in photocurrent sensor, and photocurrent sensor device |
EP1804066A4 (en) * | 2004-08-25 | 2008-12-31 | Tokyo Electric Power Co | Method for reducing temperature-dependent error in photocurrent sensor, and photocurrent sensor device |
Also Published As
Publication number | Publication date |
---|---|
JPH0137697B2 (en) | 1989-08-09 |
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