| 摘要 |
PURPOSE:To achieve a higher reliability at a high speed along with an increased life by arranging two slitted plates so as to translate changes in the angle of torsion due to a rotary torque into a change in the quantity of light passing through slits thereof to enable a contactless measurement of the level of the rotary torque. CONSTITUTION:Two slitted plates 12a and 12b are fastened sandwitching an easy to deform section 10' at the center thereof through blackets 11a and 11b while a slight clearance given therebetween. In the slitted plates, a number of slits are arranged radially on the entire circumference in the same shape and at an equal interval. The two slitted plates 12a and 12b are formed identically and are so arranged to overlap slits of one plate with those of the other plate completely when no rotary torque is applied. The width of the light receiving surface 17 shall be an integral factor of P. As compared with the quantity of light received with the application of no torque, it changes when a shaft is twisted and hence, only a change in the quantity of light received corresponding to the torsion of the shaft can be obtained from a light receiving section irrelevant to the rotation and the speed of the shaft. |
