Electric module for bicycle, bicycle tire management system, and tire condition diagnosis method of bicycle

A bicycle tire management system comprising:

• an electric module for a bicycle equipped on the bicycle comprising a pedal configured to generate rotational energy and a driving wheel configured to rotate by receiving power, the electric module comprising a pedal rotation speed detector configured to measure a rotation speed of the pedal, a motor configured to rotate the driving wheel, a driving wheel rotation speed detector configured to measure a rotation speed of the driving wheel, a control device configured to determine whether a tire is abnormal based on the rotation speed of the pedal, a torque of the motor, and the rotation speed of the driving wheel, and a modem terminal configured to transmit condition information of the tire provided by the control device;
• a mobile terminal in which an application for managing the bicycle on which the electric module for the bicycle is equipped and displaying the condition information of the tire is installed;
• and
• a cloud service configured to receive information transmitted by the modem terminal to update stored information, and transmit the updated information to the mobile terminal.

A tire condition diagnosis method of a bicycle, comprising:

• measuring a rotation speed of a pedal;
• measuring a rotation speed of a driving wheel;
• measuring a torque of a motor rotating the driving wheel;
• determining whether a tire is abnormal based on the rotation speed of the pedal, the rotation speed of the driving wheel, and the torque of the motor;
• warning a user when an abnormality occurs in the tire;
• estimating an air pressure of the tire by analyzing the rotation speed of the driving wheel compared to the torque of the motor according to the rotation speed of the pedal;
• and
• determining that an abnormality occurs in the tire when the air pressure of the tire estimated is out of a preset allowable pressure.

A tire condition diagnosis method of a bicycle, comprising:

• measuring a rotation speed of a pedal;
• measuring a rotation speed of a driving wheel;
• measuring a torque of a motor rotating the driving wheel;
• determining whether a tire is abnormal based on the rotation speed of the pedal, the rotation speed of the driving wheel, and the torque of the motor;
• and
• warning a user when an abnormality occurs in the tire,
• wherein the determining of whether the tire is abnormal comprises determining that an abnormality occurs in the tire when a value obtained by subtracting the rotation speed of the driving wheel from the rotation speed of the pedal exceeds a preset reference speed in a condition where a maximum value of the torque of the motor is maintained for a preset first reference time.