Method and apparatus for measuring variations in magnetic field orientations
US4017791A · kind A · utility
1Cited by
5References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1974 |
| Grant date | Apr 12, 1977 |
| Priority date | — |
| Expiry date | Jul 11, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A closed-loop feedback system intermittently orients a gimbaled, quadrature flux gate bearing platform perpendicular to the magnetic field. During intervening periods the loop is opened and a gyroscope preserves this platform orientation. The flux gate outputs during such intervening periods represents changes in field orientation. The output from a conventional magnetometer is used to correct said flux gate outputs for field strength variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.