Means for reducing interference among magnetometer array elements
US5170566A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1990 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Jun 5, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved fluxgate instrument for measuring heading as well and pitch and roll angles is disclosed. A plurality of fluxgate sensors are continuously energized with a DC feedback signal derived from the reading of each sensor so as to minimize magnetic cross-coupling between the sensors. In addition while two sensors are gimbally mounted to sense the horizontal components of the earth's magnetic field, the vertical field is sensed by two sensors strapped down relative to the instrument casing for sensing the earth's vertical magnetic field in order to compensate for latitude. Finally, sine and cosine coils surround the gimbally mounted sensors and generate AC fields which are sensed by the gimbally mounted sensors and are used to calculate the pitch and roll angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.