Method and measuring device for measuring reaction force and torque of resistance mechanism on flywheel

1 . A method for measuring a reaction force of a resistance mechanism on a flywheel, the method comprising:

driving the resistance mechanism, when the flywheel rotates, to move translationally in a tangential direction of the flywheel through a horizontal sliding mechanism by a reaction force of a resistance force generated by the flywheel for the resistance mechanism, such that the resistance mechanism and a force sensor connectedly contact to each other in the tangential direction of the flywheel, and the horizontal sliding mechanism is configured such that the resistance mechanism moves translationally in the tangential direction of the flywheel and the reaction force may not be affected by an angular component force; and

measuring, by the force sensor, the reaction force of a resistance force exerted by the resistance mechanism on the flywheel when the resistance mechanism connectedly contacts the force sensor, calculating the resistance force with the reaction force, and calculating a torque of a shaft of the flywheel with the calculated resistance force.

2 . The method of claim 1 , wherein the method comprising:

calculating a torque of a drivetrain conveyed from the flywheel to overcome the torque of the shaft of the flywheel, and adding the torque of the drivetrain conveyed from the flywheel to overcome the torque of the shaft of the flywheel and a torque under a state of no resistance to obtain a total torque of the drivetrain to calculate a power, an energy consumption, and a calorie consumption, wherein the method comprising:

adjusting a distance between the resistance mechanism and the flywheel in a direction to adjust the resistance force generated by the resistance mechanism, wherein the resistance mechanism translationally moves in the tangential direction of the flywheel through the horizontal sliding mechanism;

measuring a force by which the resistance mechanism connectedly contacts the force sensor in the tangential direction of the flywheel through the horizontal sliding mechanism, wherein the force is the reaction force of the resistance force exerted by the resistance mechanism on the flywheel;

measuring the reaction force, which is opposite in direction and the same in magnitude as the resistance force applied on the tangential direction of the flywheel where cuts a magnetic field or rubs against the resistance mechanism, wherein a result of multiplying the reaction force by a radius or a moment arm of the flywheel is equal to the torque of the shaft of the flywheel, and a result of multiplying the torque of the shaft of the flywheel by a gear ratio of the flywheel is equal to a torque of a shaft of the drivetrain to overcome the resistance force exerted by the resistance mechanism;

calculating a torque of the drivetrain to overcome a mechanical friction and an inertia of the flywheel under a state of no resistance, wherein the torque of the drivetrain is a function of rotation speed of the drivetrain;

adding the torque of the shaft of the drivetrain to overcome the resistance force exerted by the resistance mechanism and the torque of the drivetrain to overcome a mechanical friction and an inertia of the flywheel under a state of no resistance to obtain a total torque applied to the shaft of the drivetrain; and

calculating a power that equals the total torque of the shaft of the drivetrain multiplied by an angular velocity of the drivetrain, wherein an energy consumption of the flywheel equals to an integral of power over time.

3 . The method as claimed in claim 2 , wherein the method is performed to measure a reaction force generated by a magnetic resistance on the flywheel cutting the magnetic field or a reaction force generated by a frictional resistance contacts and rubs against the flywheel, such that to calculate a torque to overcome a resistance of the flywheel.

4 . The method of claim 3 , wherein a torque of the flywheel to overcome a magnetic resistance or a frictional resistance is multiplied by a gear ratio to calculate a torque required by the shaft of the drivetrain to overcome a resistance force of the flywheel, and the torque required by the shaft of the drivetrain to overcome the resistance force is a variable torque and may be regard as a torque of an outdoor bicycle to overcome a climbing slope.

5 . The method of claim 4 , further comprising:

calculating a torque required by the drivetrain to overcome the magnetic resistance or the frictional resistance and calculating a torque required to overcome the mechanical friction and the inertia of the flywheel at various rotation speeds under the state of no resistance, wherein a sum of the torque required by the drivetrain to overcome the magnetic resistance or the frictional resistance and the torque required to overcome the mechanical friction and the inertia of the flywheel at various rotation speeds under the state of no resistance is the total torque applied to the shaft of the drivetrain.

6 . The method of claim 5 , wherein the method further comprises calculating a total power, an energy consumption, and a calorie consumption of a rider according to the total torque.

7 . The method of claim 2 , further comprising:

pre-calibrating, in which under a state of no magnetic resistance or no frictional resistance, when the drivetrain is at any rotation speed, the torque required to overcome the mechanical friction and the inertia of the flywheel is applied to check and verify a function of rotation speed of the drivetrain, such that to calculate, under a state of no resistance, the torque required by the drivetrain to overcome the mechanical friction and the inertia of the flywheel at various rotation speeds.

8 . The method of claim 7 , further comprising:

calculating a torque required by the drivetrain to overcome the magnetic resistance or the frictional resistance and calculating a torque required to overcome the mechanical friction and the inertia of the flywheel at various rotation speeds under the state of no resistance, wherein a sum of the torque required by the drivetrain to overcome the magnetic resistance or the frictional resistance and the torque required to overcome the mechanical friction and the inertia of the flywheel at various rotation speeds under the state of no resistance is the total torque applied to the shaft of the drivetrain.