Apparatus, system and method for power measurement

摘要

A power measurement device, which may be mounted to an inside area of a crank arm, includes processing circuitry within a housing. The processing circuitry is coupled with strain gauges mounted on the crank arm, and produces a power value that is wireless transmitted to a separate display that may receive and display power measurements. The housing may include a mounted portion and a cantilever portion where the mounted portion houses the processing circuitry and the cantilever portion houses batteries supply energy for the processing circuitry and other features.

主权项

1. A power measurement assembly comprising:
a crank arm defining a common outer surface between a pedal aperture and a bottom bracket aperture; at least two strain gauges mounted on the common outer surface of the crank arm; a housing affixed to the common outer surface of the crank arm and disposed entirely at a location between the pedal aperture and the bottom bracket aperture, the housing comprises a first portion configured to cover the at least two strain gauges, a second portion disposed above and substantially parallel with the common outer surface but not in contact with the common outer surface, a processor, and a circuit connected to the at least two strain gauges, the circuit configured to provide an output proportional to a force applied to the crank arm to the processor, the processor configured to compute a value indicative of power based on the output from the circuit.