CA2239722A1 - Electro-optic voltage sensor - Google Patents

Electro-optic voltage sensor

Info

Publication number
CA2239722A1
CA2239722A1 CA002239722A CA2239722A CA2239722A1 CA 2239722 A1 CA2239722 A1 CA 2239722A1 CA 002239722 A CA002239722 A CA 002239722A CA 2239722 A CA2239722 A CA 2239722A CA 2239722 A1 CA2239722 A1 CA 2239722A1
Authority
CA
Canada
Prior art keywords
voltage
sensor
electro
signals
processor
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
CA002239722A
Other languages
French (fr)
Other versions
CA2239722C (en
Inventor
Gregory K. Woods
Todd W. Renak
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.)
Lockheed Idaho Technologies Co
Original Assignee
Individual
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
Priority claimed from US08/569,338 external-priority patent/US5892357A/en
Priority claimed from US08/570,152 external-priority patent/US5731579A/en
Application filed by Individual filed Critical Individual
Priority to CA002401771A priority Critical patent/CA2401771C/en
Publication of CA2239722A1 publication Critical patent/CA2239722A1/en
Application granted granted Critical
Publication of CA2239722C publication Critical patent/CA2239722C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02—General constructional details
    • G01R1/06—Measuring leads; Measuring probes
    • G01R1/067—Measuring probes
    • G01R1/07—Non contact-making probes
    • G01R1/071—Non contact-making probes containing electro-optic elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

An electro-optic voltage sensor for achieving voltage measurement without significant error contributions from neighboring conductors or environmental perturbations. The voltage sensor includes a transmitter (1), a sensor (4), a detector (43, 44) and a processor (62). The transmitter (1) produces a beam of electromagnetic radiation which is routed into a sensor (4). Within the sensor (4), the beam undergoes the Pockels electro-optic effect. The electro-optic effect produces a modulation of the beam's polarization, which is in turn converted to a pair of independent conversely-amplitude-modulated signals, from which the voltage of the E field is determined by the processor (62). The use of converse AM signals enables the signal processor (62) to better distinguish signal from noises. The sensor (4) converts the beam by splitting the beam in accordance with the axes of the beam's polarization state (an ellipse whose ellipticity varies between -1 and +1 in proportion to voltage) into at least two AM signals. These AM signals are fed into a signal processor (62) and processed to determine the voltage between ground conductor and the conductor (2) on which voltage is being measured.
CA002239722A 1995-12-08 1996-12-05 Electro-optic voltage sensor Expired - Lifetime CA2239722C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002401771A CA2401771C (en) 1995-12-08 1996-12-05 Electro-optic voltage sensor

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US08/569,338 1995-12-08
US08/569,338 US5892357A (en) 1995-12-08 1995-12-08 Electro-optic voltage sensor for sensing voltage in an E-field
US08/570,152 US5731579A (en) 1995-12-11 1995-12-11 Electro-optical voltage sensor head
US08/570,152 1995-12-11
PCT/US1996/019346 WO1997022012A1 (en) 1995-12-08 1996-12-05 Electro-optic voltage sensor

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002401771A Division CA2401771C (en) 1995-12-08 1996-12-05 Electro-optic voltage sensor

Publications (2)

Publication Number Publication Date
CA2239722A1 true CA2239722A1 (en) 1997-06-19
CA2239722C CA2239722C (en) 2003-04-29

Family

ID=27075040

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002239722A Expired - Lifetime CA2239722C (en) 1995-12-08 1996-12-05 Electro-optic voltage sensor

Country Status (6)

Country Link
EP (1) EP0866975A4 (en)
JP (1) JP2001526770A (en)
AU (1) AU1329197A (en)
CA (1) CA2239722C (en)
MY (1) MY125659A (en)
WO (1) WO1997022012A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5534653B2 (en) * 2008-05-28 2014-07-02 株式会社東芝 Photovoltage sensor
CN109709408B (en) * 2019-03-08 2024-05-10 广东省职业病防治院 Space direct current electric field measuring equipment
IT201900019262A1 (en) * 2019-10-18 2021-04-18 Prysmian Spa Electrical cable structure analysis method and apparatus
CN113917242A (en) * 2021-09-28 2022-01-11 华中科技大学 Conductor corona discharge electric field non-intervention measurement system and application thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1484684A (en) * 1966-03-16 1967-06-16 Merlin Gerin Electro-optical voltage reducers
US4147979A (en) * 1975-04-16 1979-04-03 Siemens Aktiengesellschaft Movable probe carrying optical waveguides with electro-optic or magneto-optic material for measuring electric or magnetic fields
US4412173A (en) * 1981-01-26 1983-10-25 The Oregon Graduate Center For Study And Research Apparatus using leakage current for measuring resistivity
DE3272713D1 (en) * 1981-06-12 1986-09-25 Meidensha Electric Mfg Co Ltd Electric field detector
US4908568A (en) * 1987-06-09 1990-03-13 Siemens Aktiengesellschaft Mechanical probe for optical measurement of electrical potentials
US5113131A (en) * 1990-02-16 1992-05-12 Southern California Edison Company Voltage measuring device having electro-optic sensor and compensator
US5113331A (en) * 1991-08-09 1992-05-12 General Motors Corporation Vehicle headlamp assembly
FI915818A0 (en) * 1991-12-11 1991-12-11 Imatran Voima Oy OPTICAL RF-GIVARE FOER MAETNING AV SPAENNING OCH ELFAELT.
JP2521395B2 (en) * 1992-08-31 1996-08-07 日本碍子株式会社 Optical voltage / electric field sensor

Also Published As

Publication number Publication date
AU1329197A (en) 1997-07-03
EP0866975A4 (en) 1998-12-23
MY125659A (en) 2006-08-30
WO1997022012A1 (en) 1997-06-19
JP2001526770A (en) 2001-12-18
CA2239722C (en) 2003-04-29
EP0866975A1 (en) 1998-09-30

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20161205