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Proceedings Paper

Detachable triangular-shaped bulk-optic glass sensor for simultaneous three-phase current measurement
Author(s): K. H. Kong; Beatrice C.B. Chu; Henry S. H. Chung; K. T. Mok; K. S. Chiang
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Paper Abstract

In this paper, we describe a detachable triangular-shaped bulk-optic glass sensor for three-phase current measurement using only one laser source. The sensor is constructed from three separate SF6 glass rods that form a triangle, where the coils of the three-phase current are mounted separately on the galas rods. Laser light is guided through the glass in a closed loop by reflecting twice at the critical angle at the two corners of the triangle. On the reflection surface of each corner, light is tapped with a right-angle prism that is pressed against the surface. The light beams tapped from the two corners and that emerging from the exit face of the sensor carry different components of the three- phase current. By processing these three light signals, the three phases of the current can be determined. To demonstrate the principle, an experimental sensor has been constructed and tested.

Paper Details

Date Published: 14 February 2002
PDF: 8 pages
Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); doi: 10.1117/12.456070
Show Author Affiliations
K. H. Kong, City Univ. of Hong Kong (Hong Kong)
Beatrice C.B. Chu, City Univ. of Hong Kong (Hong Kong)
Henry S. H. Chung, City Univ. of Hong Kong (Taiwan)
K. T. Mok, City Univ. of Hong Kong (Hong Kong)
K. S. Chiang, City Univ. of Hong Kong (Hong Kong)


Published in SPIE Proceedings Vol. 4578:
Fiber Optic Sensor Technology and Applications 2001
Michael A. Marcus; Brian Culshaw, Editor(s)

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