Coil actuated sensor with sensitivity detection
US11428755B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 26, 2017 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | May 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic field sensor includes at least one coil responsive to an AC coil drive signal; at least one magnetic field sensing element responsive to a sensing element drive signal and configured to detect a directly coupled magnetic field generated by the at least one coil and to generate a magnetic field signal in response to the directly coupled magnetic field; a processor responsive to the magnetic field signal to compute a sensitivity value associated with detection of the directly coupled magnetic field and substantially independent of a reflected magnetic field reflected by a conductive target disposed proximate to the at least one magnetic field sensing element; and an output signal generator configured to generate an output signal of the magnetic field sensor indicative of the reflected magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.