Bonde-Petersen F
Eur J Appl Physiol Occup Physiol. 1983;51(1):45-9. doi: 10.1007/BF00952536.
The ergometer is mechanically braked by a band in series with a spring. Each end of the band passes over one of two spherical ball bearings, and is attached to the free end of a spring steel bar mounted on the same plate as the two ball bearings. By means of a spindle and cogwheel the plate can be tilted in such a way as to vary the tension in the braking band. The spring steel bar is furnished with four strain-gauges coupled as a Wheatstone's bridge. The system forms a differential force transducer measuring the differences in tension between the two ends of the band. A force is, therefore, only recorded if the flywheel is moving, because at rest forces influencing the bar from the band will be opposite and equal. The ergometer offers certain advantages over the conventional mechanically braked ergometers because it has an electronic read out, and it can be used in field studies. It is independent of the attitude in relation to the vertical, and can thus be used on tilting platforms or in weightless conditions.
测力计由一条与弹簧串联的带子进行机械制动。带子的两端分别绕过两个球形滚珠轴承之一，并连接到与这两个滚珠轴承安装在同一板上的弹簧钢条的自由端。通过主轴和齿轮，该板可以倾斜，从而改变制动带中的张力。弹簧钢条配备有四个应变片，它们连接成惠斯通电桥。该系统形成一个差分力传感器，用于测量带子两端的张力差异。因此，只有当飞轮转动时才会记录力，因为静止时带子对钢条施加的力是相反且相等的。与传统的机械制动测力计相比，该测力计具有一定优势，因为它具有电子读数功能，并且可用于现场研究。它与相对于垂直方向的姿态无关，因此可用于倾斜平台或失重条件下。
