| 摘要 |
PURPOSE:To obtain a compact and light-weight torque detector which is capable of analog detection with a simple constitution, by detecting the phase difference between a vertical axis and an original axis which is generated in proportion to the load torque of the vertical axis. CONSTITUTION:When a load torque is applied to a vertical axis 8, a twisted distortion is produced to an elastic member 6. Therefore a phase difference is produced between direct-acting cams 20 and 21, and accordingly a difference of output is produced between linear displacement type potentiometers 23 and 24. The outputs of the meters 23 and 24 produced by the cams 20 and 21 are defined as g1 and g2, and therefore the absolute difference value is detected in the case of figures A and B and can be converted into the torque amount. However, the torque (O) is sometimes recognized erroneously although a torque is actually generated at a certain point since g1 is equal to g2 in case the cams 20 and 21 have a phase shift centering on an inflection point 28 as shown in the figure C. Thus the sum of absolute values of the output difference covering from the output g2 through the point 28 and the output difference covering from the point 28 through the output g1 is converted into a torque amount. |
