Method and device for positional tracking

Disclosed is a method and apparatus for positional tracking of a device. The invention takes an accurate determination of absolute position (using e.g. GPS) as the starting position 404 of the device and then determines the device's relative position along a path (using e.g. internal gyroscopes...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Andrew John Nowell, Matthew Emmanuel Milton Storke, Jake Andrew Philip Apsey
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES GYROSCOPIC INSTRUMENTS LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION SURVEYING TESTING
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Beschreibung
Zusammenfassung:	Disclosed is a method and apparatus for positional tracking of a device. The invention takes an accurate determination of absolute position (using e.g. GPS) as the starting position 404 of the device and then determines the device's relative position along a path (using e.g. internal gyroscopes) at various points 406 from that position. The error in the relative position, which increases over time and distance travelled from the starting position, is calculated along the path and when this error reaches a predefined threshold a second absolute position measurement 408 is made. The invention allows for conservation of power of the device as it uses the relatively high power sensors used to accurately determine an absolute position less frequently.