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US 7,599,806 B2Granted
Portable power meter for calculating power applied to a pedal and crank arm based drive mechanism and a method of calculating the power
AssigneeGunter Hauschildt
InventorGunter Michael Hauschildt
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Abstract
A power meter for power a pedal and crank arm based drive mechanism measures and displays athletic performance information as a measure of a physical quantity, power, using a flexible force sensor inserted into a cycling shoe. Mathematical cycling models and data from the flexible force sensor are used to calculate the power.
Claims12
A method of calculating power applied to a pedal and crank arm based drive mechanism, comprising:
- receiving force signals from a flexible force sensor inside a shoe worn by a person applying force to the pedal and crank arm based drive mechanism, the flexible force sensor being placed within the shoe so that at least a representative proportion of a total force applied by the person is sensed;
- using the force signals in mathematical models to calculate the power
- calculating an integral of a square of a derivative of the signal received from the force sensor versus time, and comparing a result to a threshold to determine whether the crank arm based drive mechanism is being rotated or is at rest;
- and
- if the crank arm based drive mechanism is at rest, setting cadence to zero and calculating average force as an average of all force samples.
2 more elements
Dependencies are inferred from the claim text.