Bicycle pedal force testing device and method thereof

Abstract

In a pedaling force detecting device for a bicycle for transmitting the force applied to a pedal to a sprocket through an elastic member, two pairs of sensors (151a,152a), (151a',152a') for detecting the magnetism of a first and a second magnetic rings 141, 142 arranged with N-poles and S-poles at equal spaces alternately, which are respectively fixed to the pedal side member and the sprocket are placed at positions apart from each other by about 180 DEG by each one pair, and the phase difference between both magnetic rings 141, 142 is determined by equalizing phase difference obtained by the respective paired sensors. Thus, even if both magnetic rings 141, 142 are axially shifted, the phase difference between both magnetic rings 141, 142 can be accurately determined and the pedaling force can be accurately detected.

Description

technical field [0001] The present invention relates to a bicycle pedaling force detection device and method, in which even if the center deviation of a pair of rotating bodies for detecting pedaling force is deviated, or when a pair of rotating bodies for detecting pedaling force are assembled, even if the initial phase is in the direction of rotation Even if there is a large deviation, the pedaling force can be detected correctly. Background technique [0002] There are various inventions related to bicycles with electric motors in the prior art, and Japanese Patent Application Laid-Open No. 9-290795 is an example thereof. In this invention, the manual drive system and the electric drive system are arranged side by side, and the output of the electric drive system is controlled corresponding to the change of the manual drive system. In this way, the change of the driving force of the motor when the manual drive torque changes sharply is slowed down, and the change of the d...

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned human driving torque detection mechanism, when the centers of the above-mentioned pair of rotating bodies deviate, the human driving torque cannot be detected correctly.

In addition, in the assembly stage of the above-mentioned pair of rotating bodies, if the initial phase shift in the direction of rotation is large, then when the human force moment is large, there will be a deviation of more than one cycle of the pulse cycle generated by the sensor, and the error cannot be accurately calculated. Phase difference of a pair of rotating bodies

For this reason, the assembly accuracy of the pair of rotating bodies is required to be high, and the structural accuracy and assembly workload of the two rotating bodies increase, which becomes the reason for increasing the cost.

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