Photoelectric Torquemeter

Abstract

A photoelectric torquemeter which can be applied to the high speed shaft is described here. Figure 2 shows a slit pattern for a glass disc of 240 slits and Figure 3 an exterior of this apparatus. Figure 1 shows a schematic diagram illustrating the principle of this torquemeter. Since the torsional angle of the shaft to which torque is applied is converted into the relative displacement between two slitted discs, the area illuminated on the cell changes in proportion to the torsional angle as shown in Figure 5.
As the parts of this meter are machined by the lathe, a good dynamic balancing is obtained. A measuring system is, as shown in Figure 1, prevented by means of the bearing from rotating. Accordingly this torquemeter can sufficiently be applied to the high speed shaft (more than 10, 000rpm).