Method and apparatus for establishing a north reference for inertial measurement units using scene correlation
US9418430B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2014 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Oct 3, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A scene correlation-based target system and related methods are provided. A reference image depicts a remotely-positioned object having identifiable characteristics, wherein a reference directional vector is established relative to the reference image. A target image of a general vicinity of the remotely-positioned object has an unknown directional vector, the target image having at least a portion of the identifiable characteristics. An inertial measuring unit has a scene correlation system, wherein the scene correlation system matches the portion of the identifiable characteristics of the target image with the identifiable characteristics of the reference image, wherein a slew angle between the reference image and the target image is calculated. A target image directional vector is derived from the calculated slew angle and the reference directional vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.