JPS57196164A - Electric current measuring device - Google Patents

Electric current measuring device

Info

Publication number
JPS57196164A
JPS57196164A JP56081579A JP8157981A JPS57196164A JP S57196164 A JPS57196164 A JP S57196164A JP 56081579 A JP56081579 A JP 56081579A JP 8157981 A JP8157981 A JP 8157981A JP S57196164 A JPS57196164 A JP S57196164A
Authority
JP
Japan
Prior art keywords
optical fiber
electric current
twist
light
single mode
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
JP56081579A
Other languages
Japanese (ja)
Inventor
Jiyunichi Sagai
Susumu Machida
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP56081579A priority Critical patent/JPS57196164A/en
Publication of JPS57196164A publication Critical patent/JPS57196164A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To attempt to have long stability of output signal and improvement of sensitivity to electric current detection by giving twist the value of which is over a specified value to a optical fiber of single mode in order to reduce susceptibility to external disturbances and so on. CONSTITUTION:A coil 2 of conductive material through which an electric current to be measured flows is wound around an optical fiber 1 of single mode and at the same time this optical fiber 1 is given mechanical twist. On the other hand, the light from He-Ne laser 3 is irradiated to the optical fiber 1 through a polarizing element 4 and an objective lens 5, and the light emitted from the optical fiber 1 is arrived at a light detector 7 through an analyser 6 to measusre the electric current I. With this arrangement, purity of straight polarization can be improved by the twist in the fiber and the flicker in light signal can be reduced.
JP56081579A 1981-05-27 1981-05-27 Electric current measuring device Pending JPS57196164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56081579A JPS57196164A (en) 1981-05-27 1981-05-27 Electric current measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56081579A JPS57196164A (en) 1981-05-27 1981-05-27 Electric current measuring device

Publications (1)

Publication Number Publication Date
JPS57196164A true JPS57196164A (en) 1982-12-02

Family

ID=13750215

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56081579A Pending JPS57196164A (en) 1981-05-27 1981-05-27 Electric current measuring device

Country Status (1)

Country Link
JP (1) JPS57196164A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0728411U (en) * 1993-11-10 1995-05-30 日芳 伊瀬 Tie holder loop

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0728411U (en) * 1993-11-10 1995-05-30 日芳 伊瀬 Tie holder loop

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