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1. CA2771347 - FIBER OPTIC CURRENT SENSING SYSTEM WITH TEMPERATURE COMPENSATION

Office Canada
Application Number 2771347
Application Date 14.06.2010
Publication Number 2771347
Publication Date 03.03.2011
Publication Kind A1
IPC
G01R 19/32
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
32Compensating for temperature change
G01R 15/24
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
15Details of measuring arrangements of the types provided for in groups G01R17/-G01R29/, G01R33/-G01R33/26176
14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
24using light-modulating devices
CPC
G01R 15/247
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
15Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00 and G01R33/00 - G01R35/00
14Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
24using light-modulating devices
247Details of the circuitry or construction of devices covered by G01R15/241 - G01R15/246
G01R 19/32
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
32Compensating for temperature change
Applicants GENERAL ELECTRIC COMPANY
Inventors LEE, BOON KWEE
GUIDA, RENATO
WU, JUNTAO
KRAEMER, SEBASTIAN GERHARD MAXIM
DEKATE, SACHIN NARAHARI
Priority Data 12548512 27.08.2009 US
Title
(EN) FIBER OPTIC CURRENT SENSING SYSTEM WITH TEMPERATURE COMPENSATION
(FR) SYSTEME DE DETECTION DE COURANT A FIBRE OPTIQUE AVEC COMPENSATION DE TEMPERATURE
Abstract
(EN)
A fiber optic sensor system employs at least one light source that operates to generate light having one or more desired wavelengths. A first optical fiber based sensor transparent to a desired light wavelength operates to sense a magnetic field emitted from a predetermined electrical conductor or a current flowing through the electrical conductor. A temperature sensor that may be another optical fiber based sensor operates to sense an operating temperature associated with the first optical fiber based sensor in response to the light generated by the light source. Signal-processing electronics adjust the sensed current to substantially compensate for temperature induced errors associated with the sensed current in response to the measured operational temperature of the fiber optic sensor.