扭矩测量, 传感器, 非晶态合金, 压磁效应

To improve the precision and sensitivity of dynamic torque non-contact measurement, a differential torque sensor based on magneto-elastic effect of the amorphous alloy, and with a supporting ring was discussed. The principles and structure of the sensor were presented, and its output characteristic equation was derived. By experiments, the effects of the gap between the sensor probe and the shaft surface on sensor outputs were analyzed, and the best gap rang was got. A contrast analysis on the measurement accuracy and sensitivity was made in both testing cases of with and without an amorphous alloy thin strips on the shaft surfaces. Experimental results show that maximum no-linear error is 2.14% F·S, maximum repeatability error 1.54% F·S, the maximum sensitivity of 2.09mV/(N·m).

torque measurement, sensor, amorphous alloy, magneto-elastic effect