Feedback Torque Sensor
-It is a null – balance torque meter which can measure torque in the range of 0 to 10 OZ – in.
-The amount of current required to maintain zero displacement is a measure of torque and is read on meter.
Torque – Bar Dynamometer
-It employed the optical methods of deflection of measurement.
-The relative angular displacement of two sections of the torsion bar can be read from the calibrated scales.
-It can measure the torque in ranges of up to 50,000% ft-lb and 50,000 rpm of rotation with error of ±0.25%
แรงบิดตามเข็ม ทำให้ R_1,R_3 ยืด และR_2,R_4 หด