NDLI: Measurement of current, voltage and power using single quartz crystal

Content Provider	IEEE Xplore Digital Library
Author	Miyashita, H. Fujii, Y.
Copyright Year	2002
Description	Author affiliation: Dept. Electron. & Comput. Sci., Nihon Univ., Chiba, Japan (Miyashita, H.; Fujii, Y.)
Abstract	Electrical quantities are now measured by fiber-optic sensors. Usually, these quantities are measured using electro-optic crystals and Faraday rotating materials, separately. Such sensors have a long history and are now utilized in various fields. In this paper, a new proposal to measure electrical quantities using one laser beam, one fiber and, moreover, only one crystal, is described. The quantities to be measured are voltage, current and electric power. This simultaneous measurement can be done using two independent parameters, namely, the ellipticity and the angle of the polarization of one light beam. The proposed design of this simultaneous sensor is given. As the sensing crystal, a quartz crystal is utilized. Since this quartz sensor is less sensitive than lithium niobate or flint glass, this is adequate for application to high-power electronics. The advantageous points of this optical sensor are common with other optical sensors: they have no contact in the measurement, they do not use the power supply at the sensing point and they have no induction noise.
Starting Page	491
Ending Page	494
File Size	242199
Page Count	4
File Format	PDF
ISBN	0780372891
DOI	10.1109/OFS.2002.1000707
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-05-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current measurement Power measurement Voltage measurement Electric variables measurement Optical fiber polarization Optical fiber sensors Laser beams Optical sensors Rotation measurement Crystals
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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