Detachable triangular-shaped bulk-optic glass sensor for simultaneous three-phase current measurement

K. H. Kong; Beatrice C.B. Chu; Henry S. H. Chung; K. T. Mok; K. S. Chiang

doi:10.1117/12.456070

14 February 2002 Detachable triangular-shaped bulk-optic glass sensor for simultaneous three-phase current measurement

K. H. Kong, Beatrice C.B. Chu, Henry S. H. Chung, K. T. Mok, K. S. Chiang

Author Affiliations +

Proceedings Volume 4578, Fiber Optic Sensor Technology and Applications 2001; (2002) https://doi.org/10.1117/12.456070
Event: Environmental and Industrial Sensing, 2001, Boston, MA, United States

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.

Citation Download Citation

K. H. Kong, Beatrice C.B. Chu, Henry S. H. Chung, K. T. Mok, and K. S. Chiang "Detachable triangular-shaped bulk-optic glass sensor for simultaneous three-phase current measurement", Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); https://doi.org/10.1117/12.456070

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KEYWORDS

Sensors

Glasses

Reflection

Prisms

Signal processing

Laser sources

Polarization

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