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Title: Electro-optical voltage sensor head

Abstract

A miniature electro-optic voltage sensor system capable of accurate operation at high voltages. The system employs a transmitter, a sensor disposed adjacent to but out of direct electrical contact with a conductor on which the voltage is to be measured, a detector, and a signal processor. The transmitter produces a beam of electromagnetic radiation which is routed into the sensor where the beam undergoes the Pockels electro-optic effect. The electro-optic effect causes phase shifting in the beam, which is in turn converted to a pair of independent beams, from which the voltage of a system based on its E-field is determined when the two beams are normalized by the signal processor. The sensor 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 and processed to determine the voltage between a ground conductor and the conductor on which voltage is being measured.

Inventors:
 [1]
  1. (Idaho Falls, ID)
Publication Date:
Research Org.:
LOCKHEED MARTIN IDAHO TECH CO
OSTI Identifier:
871440
Patent Number(s):
US 5731579
Assignee:
Lockheed Idaho Technologies Company (Idaho Falls, ID) INEEL
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
electro-optical; voltage; sensor; head; miniature; electro-optic; capable; accurate; operation; voltages; employs; transmitter; disposed; adjacent; direct; electrical; contact; conductor; measured; detector; signal; processor; produces; beam; electromagnetic; radiation; routed; undergoes; pockels; effect; causes; phase; shifting; converted; pair; independent; beams; based; e-field; determined; normalized; converts; splitting; accordance; axes; polarization; ellipse; ellipticity; varies; -1; proportion; signals; fed; processed; determine; ground; electro-optic voltage; direct electrical; voltage sensor; phase shifting; signal processor; phase shift; disposed adjacent; electrical contact; electromagnetic radiation; electro-optic effect; sensor head; sensor converts; rate operation; transmitter produces; accurate operation; miniature electro-optic; beam undergoes; pockels electro-optic; sensor disposed; signal process; optical voltage; ground conductor; optic voltage; /250/324/385/

Citation Formats

Woods, Gregory K. Electro-optical voltage sensor head. United States: N. p., 1998. Web.
Woods, Gregory K. Electro-optical voltage sensor head. United States.
Woods, Gregory K. Thu . "Electro-optical voltage sensor head". United States. https://www.osti.gov/servlets/purl/871440.
@article{osti_871440,
title = {Electro-optical voltage sensor head},
author = {Woods, Gregory K.},
abstractNote = {A miniature electro-optic voltage sensor system capable of accurate operation at high voltages. The system employs a transmitter, a sensor disposed adjacent to but out of direct electrical contact with a conductor on which the voltage is to be measured, a detector, and a signal processor. The transmitter produces a beam of electromagnetic radiation which is routed into the sensor where the beam undergoes the Pockels electro-optic effect. The electro-optic effect causes phase shifting in the beam, which is in turn converted to a pair of independent beams, from which the voltage of a system based on its E-field is determined when the two beams are normalized by the signal processor. The sensor 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 and processed to determine the voltage between a ground conductor and the conductor on which voltage is being measured.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

Patent:

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