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US 7,467,060 B2Granted
Method and apparatus for estimating a motion parameter
AssigneeGarmin Ltd.
InventorsChristopher J. Kulach, James K. Rooney, Paul R. MacDonald
Life of this patent
Estimating the term…
Abstract
A method and apparatus for estimating a motion parameter corresponding to a subject element employs one or more accelerometers operable to measure accelerations and a processing system operable to generate a motion parameter metric utilizing the acceleration measurements and estimate the motion parameter using the motion parameter metric.
Claims11
A method of estimating a motion parameter corresponding to a subject element in cyclical motion, the method comprising:
- acquiring an acceleration measurement corresponding to at least one motion cycle;
- determining a stride duration using the acceleration measurement;
- low-pass filtering the acceleration measurement utilizing a cut-off frequency between about 0.5 Hz and 10 Hz:
- calculating an acceleration magnitude using the filtered acceleration measurement;
- for each motion cycle, generating a motion parameter metric utilizing the stride duration and acceleration magnitude;
- and
- estimating the motion parameter using the motion parameter metric.
4 more elements
An apparatus operable to estimate a motion parameter corresponding to a subject element, the apparatus comprising:
- a plurality of accelerometers each operable to provide a signal corresponding to an acceleration measurement, at least two of the accelerometers being adapted to measure accelerations in two directions separated by an angle greater than zero degrees;
- and
- a processing system coupled with one or more of the accelerometers, the processing system operable to:
- calculate a stride duration using at least one of the acceleration measurements,
- low-pass filter the signals corresponding to the acceleration measurements utilizing a cut-off frequency between about 0.5 Hz and 10 Hz,
- calculate an acceleration magnitude using the acceleration measurements corresponding to the filtered signals,
- generate a motion parameter metric utilizing the stride duration and acceleration magnitude, and
- estimate the motion parameter using the motion parameter metric and a statistical regression model.
5 more elements
Dependencies are inferred from the claim text.