Magnetic tilt compensated heading compass with adaptive zoffset
US7826999B1 · kind B1 · utility
10Cited by
19References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2007 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Sep 18, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The instant invention utilizes two, optionally orthogonal and optionally slightly tilted, horizontal magnetic sensors and, optionally, a 2 or 3 axis accelerometer or inclinometer to calculate a pitch, roll and tilt compensated heading. A vertical, Z, component is relatively constant compared to X and Y components, the Z component can be abstracted from the X and Y sensor when pitch and roll is applied based on Z offset measured with X or Y sensor at high tilt angles. Additional sensors tilted at various θ degrees can be added with a different angle α to X sensors when additional horizontal and magnetic coverage is desirable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.