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US 8,165,844 B2Granted
Motion tracking system
AssigneeXsens Holding B.V.
InventorsHenk J Luinge, Daniel Roetenberg, Per J Slycke
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AssigneeXsens Holding B.V.
InventorsHenk J Luinge, Daniel Roetenberg, Per J Slycke
Estimating the term…
A system is provided for capturing motion of a moving object via a plurality of motion sensor modules placed on various body segments. The sensor modules capture both 3D position and 3D orientation data relating to their respective body segments, thereby gathering motion data having six degrees of freedom with respect to a coordinate system not fixed to the body. Each body sensor collects 3D inertial sensor data and, optionally, magnetic field data. In embodiments, either DSP circuitry within the sensor modules or an external computing device, processes the sensor data to arrive at orientation and position estimates by using an estimation algorithm, such as a Kalman filter or a particle filter. The processing includes biomechanical model constraints that allow flexibility in the joints and provide characteristics for various joint types. To improve estimation accuracy, the system may be integrated with various types of aiding sensors.
A method for capturing motion of an object having a plurality of segments via a plurality of motion sensor modules located on the segments, each of two or more of the segments of the object having thereon at least one sensor module, each sensor module being adapted to capture 3D position data and 3D orientation data associated with its respective segment, the method comprising:
A system for capturing motion of an object having a plurality of segments, the system comprising:
A motion sensor module for capturing motion of at least one of a plurality of object segments, wherein the motion sensor module is located on the at least one of the segments, the motion sensor module comprising:
Dependencies are inferred from the claim text.