Russell J C, Dale J D
J Appl Physiol (1985). 1986 Sep;61(3):1217-20. doi: 10.1152/jappl.1986.61.3.1217.
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.
在临床测试和运动生理学研究中广泛使用的自行车测力计是机械、液压或电动机械设备。因此，它们容易发生变化和误差，需要反复校准。我们开发了一种紧凑且价格低廉的扭矩计，可对测力计的整个量程进行动态校准。该扭矩计持续测量测力计踏板轴处的输入扭矩，从而包括传动系统中完成的所有功。它还允许通过内部调整将电动制动测力计调整到指定扭矩，以给出正确的刻度读数。该扭矩计依靠一个高碳钢扭转弹簧，其两端通过增加施加的扭矩而在角偏转中旋转。相对旋转通过一个多圈电位计来检测，该电位计的电阻通过滑环触点在外部进行测量。
