Patent ID: 7599806
Filing Date: 2009-10-06
Classification: A61B,A63B,G01L,G06F

Abstract:
1. 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.