Device for measuring the running parameters of a bicycle

A device for measuring operating parameters of a bicycle comprising:

• a sensor having a first state and a second state and being adapted to be affixed to a rotationally movable member of the bicycle, said sensor being constructed to change from said first state to said second state and to return to said first state in response to rotational movement of said rotationally movable member;
• a transmission circuit connected to said sensor to receive a signal from said sensor;
• a reception circuit;
• said transmission circuit comprising:
• a calculating circuit for calculating a value representative of a measured operating parameter of the bicycle based upon a signal received from said sensor;
• a transmitting antenna;
• a transmitter connected to said transmitting antenna for transmitting a signal representative of said calculated value to said reception circuit;
• an optimization circuit for activating said transmitting of said transmitting antenna at moments independent of a periodicity of changes of state of said sensor.

A wireless transmitting/receiving device for measuring at least one operating parameter of a bicycle, said device comprising:

• a transmitter casing adapted to be mounted on a rotatable member of the bicycle;
• a receiver casing having a display unit for displaying at least said operating parameter of the bicycle, said receiver being adapted to be mounted on the bicycle for observation of the display unit by a rider of the bicycle;
• a sensor for sending periodic signals in reaction to, and at a frequency equal to, a rotational frequency of the rotatable member;
• within said receiver casing, said device further comprises a receiver circuit;
• within said transmitter casing, said device further comprises:
• a transmission circuit connected to said sensor for receiving said signal sent by said sensor, said transmission circuit comprising:
• a calculator circuit for calculating a value representative of a measured operating parameter of the bicycle based upon said signal of said sensor;
• a transmitting antenna;
• a transmitter connected to said transmitting antenna for transmitting a signal representative of said calculated value to said receiver circuit within said receiver casing;
• an optimization circuit for activating said transmitting of said transmitting antenna at a frequency different from the rotational frequency of the rotatable member.

A wireless transmitting/receiving device for measuring at least one operating parameter of a bicycle, said device comprising:

• a transmitter casing adapted to be mounted on a rotatable member of the bicycle;
• a receiver casing having a display unit for displaying at least said operating parameter of the bicycle, said receiver being adapted to be mounted on the bicycle for observation of the display unit by a rider of the bicycle;
• a sensor for sending periodic signals in reaction to, and at a frequency equal to, a rotational frequency of the rotatable member;
• within said receiver casing, said device further comprises a receiver circuit;
• within said transmitter casing, said device further comprises a transmission circuit connected to said sensor for receiving said signal sent by said sensor, said transmission circuit comprising means for emitting signals from said transmitter casing to said receiver circuit at a rate differing from the rotational frequency of the rotatable member.