US 11,897,565 B2
Friction detection system for an electric bicycle
Redwood Stephens, Seattle, WA (US); Kyle Lobisser, Seattle, WA (US); Derek Gutheil, Seattle, WA (US); Jake Silsby, Seattle, WA (US); Andrew Ressa, Seattle, WA (US); Neal Wilding, Seattle, WA (US); and Zachary Williams, Seattle, WA (US)
Assigned to RAD POWER BIKES INC., Seattle, WA (US)
Filed by Rad Power Bikes LLC, Seattle, WA (US)
Filed on Dec. 28, 2021, as Appl. No. 17/564,080.
Application 17/564,080 is a continuation of application No. 17/563,613, filed on Dec. 28, 2021.
Prior Publication US 2023/0202607 A1, Jun. 29, 2023
Int. Cl. G08B 21/00 (2006.01); B62J 6/028 (2020.01); B62M 6/90 (2010.01); B62J 45/20 (2020.01); B62J 27/00 (2020.01); B62M 6/45 (2010.01); B62J 45/421 (2020.01); B62J 45/416 (2020.01); B62J 45/422 (2020.01); B62J 43/13 (2020.01); B60L 15/10 (2006.01); B60L 15/20 (2006.01); B62J 6/26 (2020.01); B62J 50/22 (2020.01); B62J 3/10 (2020.01); B62J 6/24 (2020.01); G08G 1/16 (2006.01); B62J 45/42 (2020.01); B62J 1/28 (2006.01); B62K 21/12 (2006.01); B62M 6/55 (2010.01); B62J 6/015 (2020.01); B62J 6/057 (2020.01); B62M 6/50 (2010.01); B60L 58/10 (2019.01); B62J 45/41 (2020.01); B62J 6/22 (2020.01); B62K 11/10 (2006.01); B62M 6/40 (2010.01); B62J 50/21 (2020.01); G06V 20/58 (2022.01); G06V 20/56 (2022.01); B62M 6/60 (2010.01); B62K 11/00 (2006.01); B62J 45/415 (2020.01); B62J 45/412 (2020.01); B62J 45/414 (2020.01); B62K 11/02 (2006.01)
CPC B62J 6/028 (2020.02) [B60L 15/10 (2013.01); B60L 15/20 (2013.01); B60L 15/2009 (2013.01); B60L 58/10 (2019.02); B62J 1/28 (2013.01); B62J 3/10 (2020.02); B62J 6/015 (2020.02); B62J 6/057 (2020.02); B62J 6/22 (2020.02); B62J 6/24 (2020.02); B62J 6/26 (2020.02); B62J 27/00 (2013.01); B62J 43/13 (2020.02); B62J 45/20 (2020.02); B62J 45/41 (2020.02); B62J 45/416 (2020.02); B62J 45/42 (2020.02); B62J 45/421 (2020.02); B62J 45/422 (2020.02); B62J 50/21 (2020.02); B62J 50/22 (2020.02); B62K 11/00 (2013.01); B62K 11/10 (2013.01); B62K 21/12 (2013.01); B62M 6/40 (2013.01); B62M 6/45 (2013.01); B62M 6/50 (2013.01); B62M 6/55 (2013.01); B62M 6/60 (2013.01); B62M 6/90 (2013.01); G06V 20/58 (2022.01); G06V 20/588 (2022.01); G08G 1/166 (2013.01); B60L 2200/12 (2013.01); B60L 2250/20 (2013.01); B60L 2250/22 (2013.01); B62J 45/412 (2020.02); B62J 45/414 (2020.02); B62J 45/415 (2020.02); B62K 11/02 (2013.01); B62K 2204/00 (2013.01)] 17 Claims
OG exemplary drawing
 
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.