Orientation monitoring apparatus
First Claim
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1. Apparatus for monitoring the orientation of an object comprising means for illuminating the object with a first interference pattern moving in a first direction and a second interference pattern moving in a second direction at an angle to the first direction;
- an array of sensors arranged to be mounted on the object and to produce outputs in response to the interference patterns and means to derive from the outputs and known configuration of the array alone the orientation of the object.
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Abstract
The orientation of a helmet is monitored by illuminating the cockpit volume by a moving interference pattern produced by three beams. The sensors detect the varying phase to produce outputs which are compared to determine the orientation of the helmet.
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Citations
27 Claims
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1. Apparatus for monitoring the orientation of an object comprising means for illuminating the object with a first interference pattern moving in a first direction and a second interference pattern moving in a second direction at an angle to the first direction;
- an array of sensors arranged to be mounted on the object and to produce outputs in response to the interference patterns and means to derive from the outputs and known configuration of the array alone the orientation of the object.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- 22. A sensor array comprising at least four sensors for use in apparatus for monitoring the orientation of an object to which in use the said array is mounted which apparatus comprising means for illuminating said object with a first interference pattern moving in a first direction and a second interference pattern moving in a second direction at an angle to said first direction and means to derive from outputs produced by said sensors in response to said interference patterns and known configuration of said array alone the orientation of said object.
Specification