Head tracker system
First Claim
1. A head tracker system for determining a user'"'"'s head orientation relative to a datum comprising:
- a head mounting for attachment to the user'"'"'s head and a sensor system for sensing the orientation of the head mounting relative to the datum;
characterised by a distinguishable marking and an optical sensor designed in use to be fixed respectively relative to a first known point fixed relative to the head mounting and a second known point fixed relative to the datum or vice versa and processing means for determining when the marking is within the field of view of the optical sensor and wherein the output of the processing means is used to correct for drift in the sensor system or to provide an independent verification that the system is functioning within preselected tolerances.
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Accused Products
Abstract
A head tracker system for determining a user'"'"'s head orientation relative to a datum comprises: a head mounting, preferably a helmet (2), for attachment to the user'"'"'s head and a sensor system (10,12) for sensing the orientation of the head mounting (2) relative and the datum. A distinguishable marking (26) is provided at a first known point fixed relative to the head mounting or a second known point fixed relative to the datum. At the other known point an optical sensor (18), preferably a video camera, is mounted. The system further comprises processing means (28) for determining when the marking is within the field of view of the optical sensor and the output of the processing means is used to correct for drift in the sensor system or to provide an independent verification that the system is functioning within preselected tolerances.
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Citations
14 Claims
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1. A head tracker system for determining a user'"'"'s head orientation relative to a datum comprising:
- a head mounting for attachment to the user'"'"'s head and a sensor system for sensing the orientation of the head mounting relative to the datum;
characterised by a distinguishable marking and an optical sensor designed in use to be fixed respectively relative to a first known point fixed relative to the head mounting and a second known point fixed relative to the datum or vice versa and processing means for determining when the marking is within the field of view of the optical sensor and wherein the output of the processing means is used to correct for drift in the sensor system or to provide an independent verification that the system is functioning within preselected tolerances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a head mounting for attachment to the user'"'"'s head and a sensor system for sensing the orientation of the head mounting relative to the datum;
Specification