Patent ID: 11897565
Assignee: RAD POWER BIKES INC.
Field: Transport (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 0:
1. An electric bicycle, comprising:
a frame having a head tube, down tube, top tube, and seat tube;
a front wheel attached to the frame via a fork connected to the head tube;
a rear wheel attached to the frame via a dropout assembly of the frame;
an electric motor mounted to the rear wheel that propels the electric bicycle;
a battery pack mounted to the frame of the electric bicycle that provides power to the electric motor;
a controller that controls operations of the battery pack of the electric bicycle and the electric motor of the electric bicycle;
one or more sensors attached to the frame of the electric bicycle; and
a friction detection system stored in memory of the controller, the friction detection system having multiple hardware modules, including:
a sensor data module that receives information captured by the one or more sensors of the electric bicycle;
a friction module that determines one or more metrics associated with a contact friction currently applied to the electric bicycle by a road surface upon which the electric bicycle is traveling, by:
determining multiple force vectors applied to the electric bicycle at a current speed and tilt angle of the electric bicycle from motion data captured by the one or more sensors of the electric bicycle;
comparing the multiple force vectors to baseline force vectors for the electric bicycle at the current speed and tilt angle; and
determining the one or more metrics based on the comparison of the multiple force vectors to the baseline force vectors for the electric bicycle; and

an action module that performs an action in response to the estimated contact friction currently applied to the electric bicycle.