Method for controlling a shift system of a bicycle
A method for controlling a shift system of a bicycle includes, in particular during pedaling, (i) acquiring sensor data representing a posture of a rider of the bicycle relative to the bicycle, (ii) recognizing a transition of the rider from a seated position to a standing position based on the sensor data acquired, and (iii) decreasing a gear ratio of the shift system in a controlled manner in response to recognizing the transition of the rider from the seated position to the standing position.
1 . A method for controlling a shift system of a bicycle, comprising:
acquiring sensor data representing a posture of a rider of the bicycle relative to the bicycle;
recognizing a transition of the rider from a seated position to a standing position, or from the standing position to the seated position, based on the sensor data acquired; and
decreasing a gear ratio of the shift system in a controlled manner in response to recognizing the transition of the rider from the seated position to the standing position, or increasing the gear ratio of the shift system in a controlled manner in response to recognizing the transition of the rider from the standing position to the seated position,
wherein the controlled decrease and/or increase in the gear ratio is performed so as to set a target pedaling frequency that is an increase and/or decrease of a predefined percent or absolute amount compared to a current pedaling frequency.
2 . The method according to claim 1 , further comprising:
recognizing the posture of the rider of the bicycle relative to the bicycle based on the sensor data acquired.
3 . The method according to claim 1 , wherein the sensor data representing the posture of the rider is acquired from a sensor system.
4 . A method according to claim 3 , wherein the recognition of the transition of the rider from the seated position to the standing position is performed in response to an acquisition of sensor data representing a pendulum movement of the bicycle about a longitudinal axis of the bicycle.
5 . The method according to claim 3 , wherein the recognition of the transition of the rider from the seated position to the standing position is performed in response to an acquisition of sensor data representing a reduction of a current actual pedaling frequency and/or an increase of a current actual pedal torque.
6 . The method according to claim 1 , wherein the sensor data upon which recognition of the transition of the rider from the seated position to the standing position is based is obtained from a seat occupancy sensor of the bicycle.
7 . The shift system of the bicycle, the shift system being configured to execute the method according to claim 1 , the shift system comprising:
a gear shifting mechanism; and
a control unit configured to operate the gear shifting mechanism to perform the method.
8 . An electric bicycle configured to execute the method according to claim 1 , the electric bicycle comprising:
the shift system, which comprises:
a gear shifting mechanism; and
a control unit configured to operate the gear shifting mechanism to perform the method.
9 . The method of claim 1 , wherein the method is performed while the rider is pedaling the bicycle.
10 . The method according to claim 1 , wherein the acquisition of the sensor data representing the rider's posture is performed based on sensor data from at least one of an inertial measurement unit, a torque sensor, a speed sensor, and a pedaling frequency sensor.
11 . The method according to claim 1 , wherein the controlled decrease and/or increase in the gear ratio is configured such that the target pedaling frequency is an increase or decrease of at least 5% of the current pedaling frequency or an increase or decrease of at least 5 revolutions/min.
12 . The method according to claim 1 , wherein the controlled decrease and/or increase in the gear ratio is configured such that the target pedaling frequency is an increase or decrease of at least 10% of the current pedaling frequency or an increase or decrease of at least 10 revolutions/min.
13 . A method for controlling a shift system of a bicycle, comprising:
acquiring sensor data representing a posture of a rider of the bicycle relative to the bicycle;
recognizing a transition of the rider from a seated position to a standing position, or from the standing position to the seated position, based on the sensor data acquired; and
decreasing a gear ratio of the shift system in a controlled manner in response to recognizing the transition of the rider from the seated position to the standing position, or increasing the gear ratio of the shift system in a controlled manner in response to recognizing the transition of the rider from the standing position to the seated position,
wherein:
an automatic activation of the shift system is performed based on predetermined characteristic shifting profiles, and
the controlled decrease and/or increase of the gear ratio of the shift system is performed by an adjustment between a predetermined standing characteristic shifting profile and a predetermined sitting characteristic shifting profile of the predetermined shifting profiles.
14 . A method for controlling a shift system of a bicycle, comprising:
acquiring sensor data representing a posture of a rider of the bicycle relative to the bicycle;
recognizing a transition of the rider from a seated position to a standing position, or from the standing position to the seated position, based on the sensor data acquired; and
decreasing a gear ratio of the shift system in a controlled manner in response to recognizing the transition of the rider from the seated position to the standing position, or increasing the gear ratio of the shift system in a controlled manner in response to recognizing the transition of the rider from the standing position to the seated position,
wherein the recognition of the rider's transition from the seated position to the standing position is performed in response to an acquisition of sensor data representing a brief pause of the bicycle, and
wherein the recognition of the transition of the rider from the seated position to the standing position is performed in response to a simultaneous recognition of the sensor data representing the brief pause of the bicycle and sensor data representing braking-free operation of the bicycle.
15 . The method according to claim 14 , wherein the brief pause is recognized based on a temporary reduction in speed and/or a brief, significant, decrease in acceleration of the bicycle, and the brief pause occurs for a maximum of one second.
16 . The method according to claim 15 , wherein the brief, significant, decrease in acceleration of the bicycle is greater in significance than repeated decreases in acceleration occurring between pushes of pedals during a normal pedaling cadence.
17 . The method according to claim 14 , wherein the brief pause occurs for a maximum of one second.