Device and method for measuring magnetic field(s) with calibration superimposed on the measurement and corresponding uses
US6894490B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 6, 2001 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for measuring magnetic field(s). The device includes at least one measurement acquisition pathway including a measurement current generator, a coil, a measurement resistor, at least one amplifier, and at least one antialiasing filter, delivering a measurement voltage. The device for measuring magnetic field(s) includes a device for determinating at least one electrical quantity representative of the acquisition pathway. The device for determining includes a mechanism for injecting a predetermined calibration current, including at least two frequency terms at at least two frequencies distinct from those of a measurement current, the calibration current being superimposed on the measurement current. The device for measuring magnetic field(s) also includes a calculation device delivering an estimate of the at least one electrical quantity at the frequency or frequencies of the measurement current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.