06301964 is referenced by 240 patents and cites 20 patents.

A device comprised of at least a pair of accelerometers and a tilt sensor mounted in fixed relation to a datum plane defining surface (sole of a shoe) may be used for extracting kinematic variables including linear and rotational acceleration, velocity and position. These variables may be resolved into a selected direction thereby permitting both relative and absolute kinematic quantities to be determined. The acceleration is determined using a small cluster of two mutually perpendicular accelerometers mounted on a shoe. Angular orientation of the foot may be determined by double integration of the foot's angular acceleration (which requires a third accelerometer substantially parallel to one of the two orthogonal accelerometers). The two orthogonal accelerations are then resolved into a net horizontal acceleration or other selected direction which may be integrated to find the foot velocity in the selected direction. The average of the foot velocity corresponds to the subject's gait speed.

Title
Motion analysis system
Application Number
9/347305
Publication Number
6301964 (B1)
Application Date
July 6, 1999
Publication Date
October 16, 2001
Inventor
Kipling W Fyfe
Cochrane
US
James K Rooney
Cochrane
US
Kenneth R Fyfe
Edmonton
US
Agent
Cesari and McKenna
US
Assignee
DyhaStream Innovations
US
IPC
G01P 15/08
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