Title :
Polymer dispersed liquid crystal fiber optic electric field probe
Author :
Lacquet, Beatrys M. ; Swart, Pieter L. ; Spammer, Stephanus J.
Author_Institution :
Fac. of Eng., Rand Afrikaans Univ., Johannesburg, South Africa
fDate :
2/1/1997 12:00:00 AM
Abstract :
Polymer dispersed liquid crystal inserted between two multimode optical fiber end faces forms the basis of an electric field probe. This probe has an active volume of about 0.001 mm3 and approximates a point measurement. The linear relation between detector output and electric field in the 600 V/cm to 800 V/cm range is adequate for most electric power distribution systems. As the contrast ratio of this transducer is large, it can also be used as a safety on-off detector for high-voltage equipment
Keywords :
electric field measurement; fibre optic sensors; liquid crystal devices; polymer dispersed liquid crystals; AC field; contrast ratio; electric power distribution systems; fiber optic electric field probe; high-voltage equipment; hysteresis; linear relation; multimode optical fiber; point measurement; polymer dispersed liquid crystal; safety on-off detector; transducer; Detectors; Face detection; Liquid crystal polymers; Optical fiber dispersion; Optical fibers; Optical polymers; Probes; Safety devices; Transducers; Volume measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
