Magnetism detection device
US9389282B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 5, 2014 |
| Grant date | Jul 12, 2016 |
| Priority date | — |
| Expiry date | Mar 5, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting magnetism includes a self-exciting fluxgate type magnetic oscillation sensor in each of three axes perpendicular to one another, the magnetic oscillation sensor including a magnetism sensor including a core-coil including a core made of a magnetic material and a coil wound around the core, and an operational amplifier circuit causing an AC excitation current to run through the coil to generate an output in accordance with a strength of an external magnetic field applied to the core. An air core coil not wound around a core is arranged in the vicinity of and in parallel with the core-coil of each of the magnetic oscillation sensors arranged in each of the axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.