Temperature-compensated electro-optical voltage sensor
US6885182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2004 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Mar 19, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/242
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The electra-optical voltage sensor has an electra-optically active medium and a distance medium between two electrodes, between which the voltage V to be measured is present. The media and the thicknesses d1, d2 of the media are chosen in such a way that the measured voltage signal has no temperature dependence. By way of example, the thicknesses d1, d2 are chosen in such a way that the influence of the temperature dependences of critical electra-optical coefficients and dielectric constants of the media on the voltage signal cancel one another out. The two media are advantageously arranged in the form of a rod, comprising an alternating arrangement of cylindrical elements of the two media, between the electrodes. BGO and fused silica may advantageously be used as media. The sensor is preferably cast in silicone. It is possible to realize a mechanically stable, temperature-stabilized voltage sensor with low reflection losses, a large half wave voltage and a small sensitivity toward disturbances of the electric field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.