A Precision Torquemeter Based on Magnetic Stress Anisotropy

The static behavior of torque meters, based on the principle of magnetic stress-anisotropy, has been thoroughly investigated for a device configuration suitable for incorporation in a rotating shaft without loss of accuracy. A design and operating procedure has been developed which will readily yield a device having a transfer characteristic which is reproducible and linear to within plus or minus 1 percent of its rated output. With relatively simple precautions this can be improved to plus or minus 0.2 percent, and the strong possibility of improvement to 0.1 percent is indicated.