Calibration apparatus for automatic magnetic compass correction
US4031630A · kind A · utility
71Cited by
4References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1976 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Jun 17, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for providing calibration of automatic deviation-correction circuitry for a magnetic compass. Data representing deviation-corrections for respective compass headings are derived by comparing signals representative of the actual heading of the compass with the compass output signal at a plurality of headings to provide corresponding corrections which are stored in a memory to produce an output signal representing actual heading and corrected for deviation error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.