Motion-tracking
First Claim
1. A system for tracking the motion of an object relative to a moving reference frame, comprising:
- a first inertial sensor mounted on the tracked object;
a second inertial sensor mounted on the moving reference frame; and
an element coupled to said first and second inertial sensors and configured to determine an orientation of the object relative to the moving reference frame based on the signals from the first and second inertial sensor.
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Accused Products
Abstract
Inertial trackers have been successfully applied to a wide range of head mounted display (HMD) applications including virtual environment training, VR gaming and even fixed-base vehicle simulation, in which they have gained widespread acceptance due to their superior resolution and low latency. Until now, inertial trackers have not been used in applications which require tracking motion relative to a moving platform, such as motion-base simulators, virtual environment trainers deployed on board ships, and live vehicular applications including helmet-mounted cueing systems and enhanced vision or situational awareness displays, to the invention enables the use of inertial head-tracking systems on-board moving platforms by computing the motion of a “tracking” Inertial Measurement Unit (IMU) mounted on the HMD relative to a “reference” IMU rigidly attached to the moving platform.
50 Citations
22 Claims
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1. A system for tracking the motion of an object relative to a moving reference frame, comprising:
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a first inertial sensor mounted on the tracked object;
a second inertial sensor mounted on the moving reference frame; and
an element coupled to said first and second inertial sensors and configured to determine an orientation of the object relative to the moving reference frame based on the signals from the first and second inertial sensor. - View Dependent Claims (20, 21)
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- 2. The system of claim I in which the first and second inertial sensors each comprises three angular inertial sensors selected from the set of angular accelerometers, angular rate sensors, and angular position gyroscopes.
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22. A method comprising determining an orientation of an object relative to a moving reference frame based on signals from two inertial sensors mounted respectively on the object and on the moving reference frame.
Specification