Magnetic field sensor
US9593966B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 7, 2013 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Aug 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor of magnetic fields along a direction of measurement comprising N magneto-resistive transducers TMi, a resistance of each transducer TMi varying linearly to within ±xi% as a function of an intensity of a magnetic field to be measured within a maximum range [ai; bi] of intensity of the magnetic field to be measured and non-linearly outside of this range, the index i being an identifier of the transducer TMi. The sensor further comprises a generator which generates N magnetic fields CMi using at least one permanent magnet, where each magnetic field CMi exhibits an intensity Ii in the direction of measurement. The intensity Ii being constant and independent of the intensity of the magnetic field to be measured and each transducer TMi being placed inside a respective magnetic field CMi. Each transducer TMi placed inside the magnetic field CMi forming a measurement block for which the range in which the resistance of the transducer TMi of said block varies linearly to within ±xi% is offset by Ii and becomes [ai+Ii; bi+Ii]. Each intensity Ii being different from the others so as to obtain N different ranges [ai+Ii; bi+Ii], being an integer number greater than or equal to two. The…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.