Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1981-01-26
1983-10-25
Krawczewicz, Stanley T.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
324 96, G01R 2702
Patent
active
044121733
ABSTRACT:
Apparatus using leakage current through a sample to determine resistivity. An optically active material of the type which changes the polarization of a light beam passing therethrough, responsive to an electric field, is placed between a first pair of conducting plates. The sample is placed between a second pair of conducting plates which are in parallel connection with the first pair of plates. A light source transmits light through the material and a light detector detects changes in polarization of the light which emerges from the material. Each pair of plates is charged and the rate of discharge of the plates is monitored by the light detector.
REFERENCES:
patent: 3662263 (1972-05-01), Bensel
patent: 3699649 (1972-10-01), McWilliams
patent: 4070621 (1978-01-01), Bassen et al.
Cassidy et al., Development and Evaluation of Electrooptical High-Voltage Pulse Measurement Techniques, IEE Transactions on Instrumentation and Measurement, vol. IM-19, No. 4, Nov. 1970, pp. 395-402.
G. A. Massey and J. C. Johnson; D. C. Erickson, "Laser Sensing of Electric and Magnetic Fields for Power Transmission Applications", SPIE vol. 88, Polarized Light (1976), pp. 91-95.
G. A. Massey, D. C. Erickson, and R. A. Kadlec, "Electromagnetic Field Components: Their Measurement Using Linear Electrooptic and Magnetooptic Effects", Applied Optics/vol. 14, No. 11/ Nov. 1975, pp. 2712-2719.
Robert E. Hebner; Richard A. Malewski; Esther C. Cassidy, "Optical Methods of Electrical Measurement at High Voltage Levels", Proceedings of the IEEE, vol. 65, No. 11, Nov. 1977, pp. 1524-1548.
Krawczewicz Stanley T.
The Oregon Graduate Center for Study and Research
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