Results 261 to 270 of about 12,220 (301)
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Fiber optic current sensor calibration
2001 IEEE/PES Transmission and Distribution Conference and Exposition. Developing New Perspectives (Cat. No.01CH37294), 2002Fiber optic current sensors have been touted for their potential ability to measure currents with accuracy better than 0.1% over a dynamic range extending from literally milliamps to hundreds of kiloamps. Such claims have a good theoretical basis but it is quite difficult to verify such claims, especially at the two extremes of this range. At the lower
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Development of Optical Fiber Current Sensors and Their Applications
2005 IEEE/PES Transmission & Distribution Conference & Exposition: Asia and Pacific, 2005In this paper, a development of optical fiber current sensors is presented, and examples of their applications are also introduced. Optical fiber current sensors based on the Faraday effect were expected for a long lime as compact and high performance current sensors in place of conventional current transformers.
K. Kurosawa, K. Shirakawa, T. Kikuchi
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Novel Chirped Fiber Optic Current Sensor
Frontiers in Optics 2012/Laser Science XXVIII, 2012We present a rugged magnetostriction-based optical current sensor with wide dynamic range. It consists of a fiber Bragg grating embedded in a tapered polymer block converting magnetostrictive strain into frequency chirp proportional to magnetic field.
Aaron Mueller +2 more
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Temperature compensation of fiber-optic current sensors
SPIE Proceedings, 2014We report the first fabrication of polarization rocking filters in a highly birefringent elliptical microfiber. The rocking filters are made by periodically heating/twisting a microfiber with an ellipticity of ~0.7 and a diameter of ~2.8 μm along its major axis.
Georg M. Müller +4 more
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Linearization of fiber-optic polarimetric current sensors
Optics Communications, 1991Abstract A linearization technique for a fiber-optic current sensor based on the magneto-optical effect is described. The linearization is achieved by an optimized polarizer orientation. Particular attention is payed to the use of several kinds of optical fibers. The influence of linear birefringence on the output signal is discussed.
H. Hirsch, D. Peier
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Design of a current sensor based on optical fibers
2015 9th International Symposium on Advanced Topics in Electrical Engineering (ATEE), 2015This paper present the design of a current sensor based on Faraday Effect using optical fibers devices and a polarizing beam splitter (PBS). Two different schematics are to be taken into account, for high currents and for smaller ones. A single polarized laser signal is sent to the PBS prism and two angular components are separated.
Marcel Stanciu +3 more
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Fiber-Optic Current Sensor for Electrowinning of Metals
Journal of Lightwave Technology, 2007A highly accurate fiber-optic current sensor for direct currents up to 500 kA is presented. Applications include the control of the electrolysis process for the production of metals such as aluminum, copper, zinc, magnesium, and others. The sensor offers significant advantages with regard to performance and ease of use compared to state-of-the-art Hall-
K. Bohnert +4 more
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Fiber optic microampere dc current sensor
Optical Engineering, 2003A microampere dc current is measured by a fiber optic sen- sor. The phase change of the guided light induced by ohm's heat over a golden-coated fiber is detected by an interferometer. The thermal con- duction of the optical fiber and the relation of the temperature-induced phase change of the guided light are explored. A Michelson interferom- eter plus
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Fiber-optic current sensor with heterodyne detection
Review of Scientific Instruments, 1986The toroidal plasma current in the ZT-40M experiment (100–380 kA) has been measured using a fiber-optic sensor. This sensor consists of six turns of permanently twisted, single-mode fiber which was wound poloidally around the experiment. By modifying the laser output to a rotating linear polarization, amplitude-independent single output heterodyne ...
G. I. Chandler +3 more
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The Nonreciprocal Errors in Fiber Optic Current Sensors
Optics & Laser Technology, 2011Abstract Nonreciprocal errors in fiber-optic current sensors, which are induced by environment fluctuations such as temperature and linear and angular vibrations, are specified. These errors in three current sensor configurations are evaluated and compared theoretically.
Wei Wang, Xuefeng Wang, Junlei Xia
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