JPS57141562A - Optical measuring device of dc voltage field - Google Patents

Optical measuring device of dc voltage field

Info

Publication number
JPS57141562A
JPS57141562A JP56027953A JP2795381A JPS57141562A JP S57141562 A JPS57141562 A JP S57141562A JP 56027953 A JP56027953 A JP 56027953A JP 2795381 A JP2795381 A JP 2795381A JP S57141562 A JPS57141562 A JP S57141562A
Authority
JP
Japan
Prior art keywords
output
light
agc205
adder
synthesized
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
JP56027953A
Other languages
Japanese (ja)
Inventor
Koichi Tsujii
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP56027953A priority Critical patent/JPS57141562A/en
Publication of JPS57141562A publication Critical patent/JPS57141562A/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
    • G01R15/241—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using electro-optical modulators, e.g. electro-absorption
    • G01R15/242—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using electro-optical modulators, e.g. electro-absorption based on the Pockels effect, i.e. linear electro-optic effect

Landscapes

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

Abstract

PURPOSE:To realize the electric detection of a voltage of DC or low frequency approximate to the DC, by mixing the DC and the AC in a certain ratio for the base light and holding a certain amplitude of the modulated light given from a BSO sensor. CONSTITUTION:The outputs of an AC reference voltage source 201 and a DC reference voltage source 202 are synthesized by a synthesizer 203 and in a certain ratio, and the synthesized output is applied to an NFB loop 256 through an AGC205. The output of a light emitting diode E/O207 which is driven by a driving circuit 206 is partially extracted by an optical branching device 208 and reproduced into the electric signal through an O/E209 to be compared with the original electric signal by an adder 210. Thus the error is compensated. Then an output light 211 is fed to a reading part as an input light 212 and compared with the output of the source 201 by an adder 217 via an O/E213 and an AC component extracting circuit 215. And the AGC205 is controlled by the result of comparison.
JP56027953A 1981-02-26 1981-02-26 Optical measuring device of dc voltage field Pending JPS57141562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56027953A JPS57141562A (en) 1981-02-26 1981-02-26 Optical measuring device of dc voltage field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56027953A JPS57141562A (en) 1981-02-26 1981-02-26 Optical measuring device of dc voltage field

Publications (1)

Publication Number Publication Date
JPS57141562A true JPS57141562A (en) 1982-09-01

Family

ID=12235251

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56027953A Pending JPS57141562A (en) 1981-02-26 1981-02-26 Optical measuring device of dc voltage field

Country Status (1)

Country Link
JP (1) JPS57141562A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59155764A (en) * 1983-02-24 1984-09-04 Yokogawa Hokushin Electric Corp Photovoltometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59155764A (en) * 1983-02-24 1984-09-04 Yokogawa Hokushin Electric Corp Photovoltometer

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