JPS57184974A - Photo measuring device - Google Patents

Photo measuring device

Info

Publication number
JPS57184974A
JPS57184974A JP56071805A JP7180581A JPS57184974A JP S57184974 A JPS57184974 A JP S57184974A JP 56071805 A JP56071805 A JP 56071805A JP 7180581 A JP7180581 A JP 7180581A JP S57184974 A JPS57184974 A JP S57184974A
Authority
JP
Japan
Prior art keywords
temperature
light
detecting element
optical
amplifier
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
JP56071805A
Other languages
Japanese (ja)
Other versions
JPH0373821B2 (en
Inventor
Kazuo Hisama
Shuichi Tai
Toshio Aranishi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56071805A priority Critical patent/JPS57184974A/en
Publication of JPS57184974A publication Critical patent/JPS57184974A/en
Publication of JPH0373821B2 publication Critical patent/JPH0373821B2/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)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Measuring Magnetic Variables (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To perform a correction of temperature through detection of temperature from the output of a light detector, by a method wherein a temperature detecting element, exercising the influence on passage light corresponding to temperature, is mounted to a part of a transmission path between a light emitting device and the light detector. CONSTITUTION:Light from a light emitting device 1 is fed to a photomagnetic field sensor 3 via an optical fiber 2a, and after light is rectilinearly polarized by a polarizer 5, an optical Faraday element 6 turns a polarizing direction corresponding to a magnitude of an external detecting element 9, made of a material whose absorbance varies with temperature to enter a light sensor 7, it is fed to a light detector 8 via an optical fiber 2b, and it is processed by an AC amplifier 10, a DC amplifier 11, and divider 12 to obtain an output. This permits compensation of a Verdet constant of the Faraday element 6 for a temperature property by means of the optical temperature detecting element 9, and permits the high-precise measurement of a physical volume such as external magnetic field.
JP56071805A 1981-05-09 1981-05-09 Photo measuring device Granted JPS57184974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56071805A JPS57184974A (en) 1981-05-09 1981-05-09 Photo measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56071805A JPS57184974A (en) 1981-05-09 1981-05-09 Photo measuring device

Publications (2)

Publication Number Publication Date
JPS57184974A true JPS57184974A (en) 1982-11-13
JPH0373821B2 JPH0373821B2 (en) 1991-11-25

Family

ID=13471143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56071805A Granted JPS57184974A (en) 1981-05-09 1981-05-09 Photo measuring device

Country Status (1)

Country Link
JP (1) JPS57184974A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2634553A1 (en) * 1988-07-21 1990-01-26 Schlumberger Ind Sa MAIN AND SECONDARY OPTICAL SENSOR DEVICE
US4956607A (en) * 1988-03-03 1990-09-11 Ngk Insulators, Ltd. Method and apparatus for optically measuring electric current and/or magnetic field
WO2003034009A3 (en) * 2001-10-16 2003-12-11 James N Blake Optical interferometric sensor with optical error compensation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5629174A (en) * 1979-08-17 1981-03-23 Matsushita Electric Ind Co Ltd Electric current measuring device
JPS56112657A (en) * 1980-02-13 1981-09-05 Matsushita Electric Ind Co Ltd Measuring device for current

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5629174A (en) * 1979-08-17 1981-03-23 Matsushita Electric Ind Co Ltd Electric current measuring device
JPS56112657A (en) * 1980-02-13 1981-09-05 Matsushita Electric Ind Co Ltd Measuring device for current

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4956607A (en) * 1988-03-03 1990-09-11 Ngk Insulators, Ltd. Method and apparatus for optically measuring electric current and/or magnetic field
FR2634553A1 (en) * 1988-07-21 1990-01-26 Schlumberger Ind Sa MAIN AND SECONDARY OPTICAL SENSOR DEVICE
US5028865A (en) * 1988-07-21 1991-07-02 Psc Protections Et Systemes De Controle Device having main and secondary optical sensors
WO2003034009A3 (en) * 2001-10-16 2003-12-11 James N Blake Optical interferometric sensor with optical error compensation
US7038786B2 (en) 2001-10-16 2006-05-02 Nxtphase T & D Corporation Optical interferometric sensor with measureand compensation that may selectively be used for temperature compensation and long term life degradation

Also Published As

Publication number Publication date
JPH0373821B2 (en) 1991-11-25

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