Design and Application of Strain Brushless Torque Sensor

The torque monitoring of high-speed rotary shaft is often unsuccessful because of sensor installation, reliability, accuracy and other practical issues, so high-speed rotary shaft torque monitoring has become an urgent need. The brushless torque sensor is developed based on strain measurement, which transformed the torque to the deformation of the shell, the torque value is obtained by strain measurement of the shell, the measurement error is less than 4% by experimental verification. In a torque measurement of cold rolling mill main transmission shaft, the torque vibration data is verified by inherent characteristic simulation of rolling mill drive system, and the torque amplitude data is verified by motor power and speed signals. It is proved that the strain brushless torque sensor is feasible and the measurement result is correct, which provides a basis for other high-speed rotating shaft torque detection works.