JPS56112657A - Measuring device for current - Google Patents

Measuring device for current

Info

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
Application number
JP1680980A
Other languages
Japanese (ja)
Other versions
JPH0137697B2 (en
Inventor
Tetsuo Taniuchi
Osamu Kamata
Yoshinobu Tsujimoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1680980A priority Critical patent/JPS56112657A/en
Publication of JPS56112657A publication Critical patent/JPS56112657A/en
Publication of JPH0137697B2 publication Critical patent/JPH0137697B2/ja
Granted 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 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.
JP1680980A 1980-02-13 1980-02-13 Measuring device for current Granted JPS56112657A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (11)

* Cited by examiner, † Cited by third party
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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