PMID: 3759761Sep 1, 1986Paper

Dynamic torquemeter calibration of bicycle ergometers

Journal of Applied Physiology
J C Russell, J D Dale

Abstract

Bicycle ergometers as widely used in both clinical testing and exercise physiology studies are mechanical, hydraulic, or electromechanical devices. They are thus subject to change and error, creating a need for repeated calibration. We have developed a compact inexpensive torquemeter that permits dynamic calibration of the entire range of an ergometer. The torquemeter continuously measures the input torque at the pedal shaft of the ergometer and thus includes all work done in the drivetrain. It also permits adjustment of electrically braked ergometers to a specified torque using internal adjustments to give correct scale readings. The torquemeter depends on a high carbon steel torsion spring whose ends are rotated in angular deflection by increasing applied torque. Relative rotation is sensed through a multiturn potentiometer, the resistance of which is measured externally through a slip ring contact.

Citations

Aug 24, 2016·Journal of Sports Sciences·Barney WainwrightJohn Paul O'Hara
Jun 29, 2001·Sports Medicine·C D Paton, W G Hopkins
Jan 14, 2003·American Journal of Respiratory and Critical Care Medicine·UNKNOWN American Thoracic Society, UNKNOWN American College of Chest Physicians

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