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KR940011956A - 전압센서 - Google Patents

전압센서 Download PDF

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Publication number
KR940011956A
KR940011956A KR1019930024686A KR930024686A KR940011956A KR 940011956 A KR940011956 A KR 940011956A KR 1019930024686 A KR1019930024686 A KR 1019930024686A KR 930024686 A KR930024686 A KR 930024686A KR 940011956 A KR940011956 A KR 940011956A
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KR
South Korea
Prior art keywords
voltage
polarizer
pockels element
pockels
voltage sensor
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KR1019930024686A
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English (en)
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KR100201022B1 (ko
Inventor
히데노부 하마다
Original Assignee
모리시타 요이찌
마쯔시다덴기산교 가부시기가이샤
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Publication of KR940011956A publication Critical patent/KR940011956A/ko
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • 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

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

Abstract

본 발명은, 배권선의 대기간전압 혹은 모터등의 구동전원전압을 검지하는 광 PT등에 이용되는 전압센서에 관한 것으로서, 피측정전압의 주파수에 의존하지 않는 전압센서를 제공하는 것을 목직으로하며, 그 구성에 있어서, 입사쪽으로부터 광축(13)상에 제1편광자(1), 검출용포켈스소자(2), 변조용포켈스소자(3), 제2편광자(4)의 차례로 배치하고, 검출용포겔스소자(2)에는 피측정전압에 비례하는 전계를 인가하고. 변조용포겔스소자(3)에는 1주기당의 위상차각이 변화하는 범위의 크기를 대략 2nπ라디안(n= 1.2,3...)변화시키고 또한 상기 검출용포켈스소자(2)에 인가하는 전계보다 높은 주파수를 가진 주기변조전계를 인가하고, 제2편광자(4)의 출사광강도의 위상변화를 연산처리하므로서 피측정전압을 검출하는 것을 특징으로 하며, 이로서, DC에서부터 고주파까지 외부환경의 영향을 받지않고 피측정전압을 정확하게 검출할 수 있는 전압센서를 실현한다.

Description

전압센서
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 제1실시예에 있어서의 위상변조방식전압센서의 개략도.
제2도는 본 발명의 제1실시예에 있어서의 위상변조방식전압센서의 동작설명도,
제3도는 본 발명의 제2실시예에 있어서의 주파수변조방식전압센서의 개요도.

Claims (7)

  1. 광의 입사쪽으로부터 광축상에 제1편광자를, 서로 설정각이 똑같은 제1포켈스소자와 제2포켈스소자, 제2편광자를 차레로 배치하고, 제1포켈스소자에는 피측정전압에 비례하는 전압을 인가하고, 제2포켈스소자에는 1주기의 위상차각이 변화하는 범위의 크기를 대략2nπ라디안(n=1,2,3...)변화시키고, 또한 제1포켈스소자에 인가하는 전압보다 높은 주파수를 가진 변조주기전압을 인가하고, 제2편광자의 출사광강도변화의 위상변화에 의해서 피측정전압을 검출하는 것을 특징으로 하는 전압센서.
  2. 제1항에 있어서, 청구범위 제1항기재의 제2포켈스소자에 피측정전압에 비례하는 전압을 인가하고, 제1포켈스소자에 청구범위 제1항 기재의 변조주기전압을 인가하는 것을 특징으로 하는 전압센서.
  3. 청구범위 제1항기재의 제1포켈스소자에 피측정전압을 시간적분한 값에 비례하는 전압을 인가하고, 제2포켈스소자에는 청구범위 제1항기재의 변조주기전압을 인가하고, 제2편광소자의 출사광강도변화의 주파수변화에 의해서 피측정 전압을 검출하는 것을 특징으로 하는 전압센서.
  4. 제3항에 있어서, 청구범위 제1항기재의 제2포켈스소자에 피측정전압을 시간적분한 값에 비례하는 전압을 인가하고, 제1포켈스소자에는 청구범위 제1항기재의 변조주기전압을 인가하는 것을 특징으로 하는 전압센서.
  5. 제1항∼제4항에 있어서, 청구범위 제1항∼제4항 기재의 제1편광자와 제2편광자의 편광방향이 서로 평행 또는 직교가 되도록 설정하고. 청구범위 제1항∼제4항 기재의 변조주기전압으로서, 포켈스소자의 1주기당의 위상차각을 대략 kπ-대략(k+n)π(k=...-1,0,1, n-1,2,3...)의 범위로 변화시키고, 또한 피측정전압보다 높은 주파수를 가진 주기전압을 인가하는 것을 특징으로 자는 전압센서.
  6. 제1항∼제4항에 있어서. 청구범위 제1항∼제4항 기재의 제1편광자와 제2편광자의 편광방향이 서로 평행또는 직교, 또한 제1편광자, 제1포켈스소자, 제2포켈스소자, 제2편광자의 어느 것인가의 사이에 1/4파장판을 설정하고, 청구범위 제1항∼제4항 기재의 변조주기전압으로서, 포켈스소자의 1주기당의 위상차각이 변화하는 범위를 대략 kπ+π/2∼대략(k+n)π+π/2 (k=...-1,0,1, n= 1,2,3...)변화시키고, 또한 피측정전압보다 높은 주파수를 가진 주기전압을 인가하는 것을 특징으로 하는 전압센서.
  7. 제1편광자. 제1포켈스소자, 제2포켈스소자, 제2편광자의 적어도 1개의 사이에 광의 편파상태를 유지하는 광전송로를 사용하는 것을 특징으로 하는 전압센서.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930024686A 1992-11-20 1993-11-19 전압센서 Expired - Fee Related KR100201022B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP31220392 1992-11-20
JP92-312203 1992-11-20

Publications (2)

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KR940011956A true KR940011956A (ko) 1994-06-22
KR100201022B1 KR100201022B1 (ko) 1999-06-15

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KR1019930024686A Expired - Fee Related KR100201022B1 (ko) 1992-11-20 1993-11-19 전압센서

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US (1) US5477134A (ko)
EP (1) EP0599181B1 (ko)
KR (1) KR100201022B1 (ko)
DE (1) DE69320763T2 (ko)
TW (1) TW224513B (ko)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0696739B1 (en) * 1994-08-12 2002-11-20 Matsushita Electric Industrial Co., Ltd. Optical sensor
DE19716477B4 (de) * 1997-03-05 2011-11-10 Areva T&D Sa Verfahren und Einrichtung zur Messung einer elektrischen Spannung
US6252388B1 (en) 1998-12-04 2001-06-26 Nxtphase Corporation Method and apparatus for measuring voltage using electric field sensors
JP2000258465A (ja) * 1999-03-09 2000-09-22 Hitachi Ltd 光電圧センサ
US6380725B1 (en) 2000-02-15 2002-04-30 Nxtphase Corporation Voltage sensor
JP2004093257A (ja) * 2002-08-30 2004-03-25 Oki Electric Ind Co Ltd 光センサユニット
US7173956B2 (en) * 2003-02-12 2007-02-06 Northrop Grumman Corporation Electrically controlled uniform or graded reflectivity electro-optic mirror
US7009378B2 (en) * 2003-09-05 2006-03-07 Nxtphase T & D Corporation Time division multiplexed optical measuring system
KR102251284B1 (ko) * 2020-11-27 2021-05-12 국방과학연구소 광학 소자를 이용하여 전압을 측정하기 위한 장치 및 방법

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* Cited by examiner, † Cited by third party
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US3584949A (en) * 1968-12-04 1971-06-15 Richard G Clow Optical computing apparatus and method
JPS5647723A (en) * 1979-09-27 1981-04-30 Nippon Hoso Kyokai <Nhk> Rotation measuring method for light phase and plane of polarization
JPS5918923A (ja) * 1982-07-23 1984-01-31 Toshiba Corp 複屈折測定装置
JPS5990061A (ja) * 1983-07-01 1984-05-24 Masahiko Inoue コンデンサ形計器用変圧器の出力信号伝送装置
JPH06100619B2 (ja) * 1985-12-24 1994-12-12 松下電器産業株式会社 光フアイバ応用センサ
US5111135A (en) * 1989-07-12 1992-05-05 Ngk Insulators, Ltd. Method for optically measuring electric field and optical voltage/electric-field sensor
JP2986503B2 (ja) * 1990-03-09 1999-12-06 株式会社日立製作所 光方式直流電圧変成器
US5134361A (en) * 1991-02-19 1992-07-28 The United States Of America As Represented By The Secretary Of The Navy Opitcal system for linearizing non-linear electro-optic

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Publication number Publication date
EP0599181B1 (en) 1998-09-02
DE69320763T2 (de) 1999-01-14
TW224513B (ko) 1994-06-01
EP0599181A2 (en) 1994-06-01
US5477134A (en) 1995-12-19
EP0599181A3 (en) 1995-03-08
DE69320763D1 (de) 1998-10-08
KR100201022B1 (ko) 1999-06-15

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