Patent ID: 9354131
Filing Date: 2016-05-31
CPC Classification: G01L

Claim Text:
1. An apparatus for monitoring torque transmitted by a driving wheel of a human powered vehicle, the human powered vehicle being a bicycle and the driving wheel being a bicycle wheel, said apparatus comprising one single electromagnetic emitter which is adapted to be fixed securely to a central region of said bicycle wheel for generating and directing a beam of electromagnetic radiation towards a rim of said bicycle wheel, and one single one-dimensional position sensitive detector mounted on said wheel for detecting a deflection of the beam when torque is applied to said bicycle wheel, the apparatus measuring a deflected distance of said beam and calculating torque from the deflected distance and a wheel torsion coefficient of the bicycle wheel and wherein said emitter and said detector rotate with the bicycle wheel and said beam travels at least a distance between said emitter at said central region and said rim of said bicycle wheel before detection.