Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Reexamination Certificate
2005-04-05
2005-04-05
Pascal, Robert (Department: 2829)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
C324S072500
Reexamination Certificate
active
06876188
ABSTRACT:
The voltage sensor for measurement of a voltage V, which is present between two electrodes (3, 4) and generates an electric field E, comprises at least two layers (1a,2a) made of electro-optically active material and being arranged along a light path (5). Through the layers there passes a light beam, the phase and/or state of polarization of which is influenced on account of the electro-optical effect. The orientation of the electro-optically active layers (1a,2a) relative to the light path and the electric field E is chosen in such a way, that the influencing of the light (5) in the second layer (2a) counteracts the influencing of the light (5) in the first layer (1a). In this way, it is possible to realize a sensor with a high half wave voltage, so that high voltages V can be measured unambiguously. A plurality of first and second electro-optically active layers are advantageously arranged between the electrodes (3, 4).
REFERENCES:
patent: 4269483 (1981-05-01), Feldtkeller
patent: 4465969 (1984-08-01), Tada et al.
patent: 4563093 (1986-01-01), Tada et al.
patent: 4631402 (1986-12-01), Nagatsuma et al.
patent: 5055770 (1991-10-01), Takahashi et al.
patent: 5109189 (1992-04-01), Smith
patent: 5111135 (1992-05-01), Kozuka et al.
patent: 6307666 (2001-10-01), Davidson et al.
patent: 20030034768 (2003-02-01), Kraemmer
patent: 197 16 477 (1998-09-01), None
patent: 0 293 842 (1988-05-01), None
patent: 0682261 (1995-04-01), None
patent: 0 997 738 (2000-05-01), None
patent: 03249569 (1991-11-01), None
patent: 05 119075 (1993-05-01), None
patent: 10-132864 (1998-05-01), None
J.C. Santos et al., “New Multi-Segment Pockels Device for High-Voltage Measurement”, International Conference on Electrical Engineering, 1996, pp. 1366-1370, vol. 2, International Academic Publishers, Beijing, China.
Masao Ohtsuka, “Influence of Optical Rotary Power on Optical Voltage Sensor Using BGO Crystal”, Electronics and Communications in Japan, Part 2, 1994, pp. 21-31, vol. 77, No. 5, Scripta Technica, Inc.
European Search Reports for corresponding EPO Applications, 03405271.2 and 03405213.4.
Bohnert Klaus
Brändle Hubert
Frank Andreas
ABB Research LTD
Nguyen Jimmy
LandOfFree
Electro-optical voltage sensor for high voltages does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electro-optical voltage sensor for high voltages, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-optical voltage sensor for high voltages will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3427848