Device for measuring an electric current by Faraday effect
US6504355B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2001 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Jun 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light beam output from a magneto-optical current transducer using the Faraday effect is divided into two output light beams. A first output light beam is applied, via an output polarizer, to a first optical input of a processing unit. A second output light beam is applied to a second optical input of the processing unit. The processing unit converts the two beams into electrical signals U1 and U2, then computes a first quantity R=U1/U2, determines the AC component (RAC) and the DC component (RDC) of the first quantity and deduces therefrom a second quantity S=RAC/RDC enabling the electric current to be measured to be determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.