JPS57184975A - Photo measuring device - Google Patents

Photo measuring device

Info

Publication number
JPS57184975A
JPS57184975A JP56071810A JP7181081A JPS57184975A JP S57184975 A JPS57184975 A JP S57184975A JP 56071810 A JP56071810 A JP 56071810A JP 7181081 A JP7181081 A JP 7181081A JP S57184975 A JPS57184975 A JP S57184975A
Authority
JP
Japan
Prior art keywords
light
photo
wavelength
optical fiber
devider
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.)
Pending
Application number
JP56071810A
Other languages
Japanese (ja)
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 JP56071810A priority Critical patent/JPS57184975A/en
Publication of JPS57184975A publication Critical patent/JPS57184975A/en
Pending 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
    • 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

Abstract

PURPOSE:To simplify the structure of an optical system and to improve precision, by a method wherein using 2 types of light source being different in wavelength, a current is measured by light having one wavelength and a voltage by light having the other wavelength, and an optical fiber is used as a transmission path. CONSTITUTION:Lights from emitting devices 24 and 25 having light sources with wavelengths lambda1 and lambda2 are inputted to a photo composing device 27 for multiplex to supply it to a photo detector 28 via an optical fiber 26c. The light is rectilinearly polarized by a polarizer 3 and devided by means of a photo devider 30, the one is fed to a light Farady element 4 which applies an external magnetic field 5, and the other to an electrooptical element 6 which applies an electric field from a terminal 7. The outputs are devided by a photo-devider 36 via a photo composing device 33, a optical sensor 34, and an optical fiber 35a, and are processed by light detectors 37 and 38 and a signal processing circuit 39 to obtain an output. The use of two types of light sources permits the substantial simplification of an optical system and enables easy measuring of a current and a voltage.
JP56071810A 1981-05-09 1981-05-09 Photo measuring device Pending JPS57184975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56071810A JPS57184975A (en) 1981-05-09 1981-05-09 Photo measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56071810A JPS57184975A (en) 1981-05-09 1981-05-09 Photo measuring device

Publications (1)

Publication Number Publication Date
JPS57184975A true JPS57184975A (en) 1982-11-13

Family

ID=13471287

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56071810A Pending JPS57184975A (en) 1981-05-09 1981-05-09 Photo measuring device

Country Status (1)

Country Link
JP (1) JPS57184975A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60137380U (en) * 1984-02-22 1985-09-11 東京電力株式会社 Optical high voltage electrical quantity measuring device
JPH0572307A (en) * 1991-09-18 1993-03-26 Ngk Insulators Ltd Magnetic field measuring device
EP3798643A1 (en) * 2019-09-25 2021-03-31 Lumiker Aplicaciones Tecnologicas S.L. Optical fiber-based current measuring equipment for measuring the current circulating through a conductor and associated method
US11789043B2 (en) 2019-09-25 2023-10-17 Lumiker Aplicaciones Tecnológicas S.L. Method and apparatus for measuring the current circulating through a conductor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60137380U (en) * 1984-02-22 1985-09-11 東京電力株式会社 Optical high voltage electrical quantity measuring device
JPH0572307A (en) * 1991-09-18 1993-03-26 Ngk Insulators Ltd Magnetic field measuring device
EP3798643A1 (en) * 2019-09-25 2021-03-31 Lumiker Aplicaciones Tecnologicas S.L. Optical fiber-based current measuring equipment for measuring the current circulating through a conductor and associated method
US11789043B2 (en) 2019-09-25 2023-10-17 Lumiker Aplicaciones Tecnológicas S.L. Method and apparatus for measuring the current circulating through a conductor

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