Method and device for measuring force, torque and output on an ergometer or bicycle
First Claim
1. A method for measuring force, torque and output on an ergometer or a bicycle, comprising:
- transmitting torque from two pedal cranks, equipped with pedals, via a shaft to a wrap-around drive that has a belt pulley or a chain wheel connected fixedly in terms of rotation to the shaft in at least one direction of rotation, and to an ergometer flywheel or to a rear wheel of the bicycle;
detecting elastic torsions of the shaft, which result from the torque transmission, via a separate sensor arranged axially on each side of the belt pulley or of the chain wheel independently of one another, as a measure of forces applied to the shaftgenerating corresponding sensor signals; and
delivering the sensor signals generated for further processing to a storage and/or an evaluation unit to determine the torque and the output both of a left and a right leg of a user of the ergometer or the bicycle based on the elastic torsions of the shaft detected.
5 Assignments
0 Petitions
Accused Products
Abstract
A method and device for measuring force, torque and output on an ergometer or bicycle. When the ergometer or bicycle is used as intended, a torque is transmitted via a shaft onto a flexible drive and further onto the flywheel of an ergometer or the rear wheel of the bicycle by two pedal cranks. The flexible drive has a pulley or a sprocket wheel which is non-rotatably connected to the shaft in at least one direction of rotation. Elastic torsions of the shaft that result independently from the torque transmission are detected at both sides of the pulley or of the sprocket wheel as a measure of the forces applied to the shaft to determine the torque and output both of the left and right leg of the user of the ergometer or bicycle. Corresponding electrical sensor signals are generated and supplied to a memory and/or evaluation unit for further processing.
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Citations
12 Claims
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1. A method for measuring force, torque and output on an ergometer or a bicycle, comprising:
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transmitting torque from two pedal cranks, equipped with pedals, via a shaft to a wrap-around drive that has a belt pulley or a chain wheel connected fixedly in terms of rotation to the shaft in at least one direction of rotation, and to an ergometer flywheel or to a rear wheel of the bicycle; detecting elastic torsions of the shaft, which result from the torque transmission, via a separate sensor arranged axially on each side of the belt pulley or of the chain wheel independently of one another, as a measure of forces applied to the shaft generating corresponding sensor signals; and delivering the sensor signals generated for further processing to a storage and/or an evaluation unit to determine the torque and the output both of a left and a right leg of a user of the ergometer or the bicycle based on the elastic torsions of the shaft detected. - View Dependent Claims (2, 3, 4)
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5. A device for measuring force and output on an ergometer or bicycle, where torque transmission from two pedal cranks, equipped with pedals, via a shaft to a wrap-around drive and, further on, to an ergometer flywheel or to a rear wheel of the bicycle takes place, and where the wrap-around drive has a belt pulley or a chain wheel which is connected fixedly in terms of rotation to the shaft in at least one direction of rotation,
wherein a separate sensor for contactless detection of deformations of the shaft in the form of elastic torsions resulting from torque transmission, as a measure of forces applied to the shaft, for the purpose of determining the torque and the output both of a left and of a right leg of a user of the ergometer or the bicycle, is arranged axially on each side of the belt pulley or the chain wheel.
Specification