| 摘要 |
A magnetic field is generated in the vicinity of a rotatably driven, loaded shaft. A Wiegand device in the shaft is differentially displaced by twisting of the shaft. Changes in magnetization in the regions during rotation of the shaft are detected by a coil. The characteristics of the pulses generated by the coil are representative of the twisting of the shaft and accordingly the torque transmitted thereby. A first signal is derived, which is representative of a characteristic of the generated pulses and a second signal is derived, which is representative of the period of the changes in magnetization. Power is represented by the quotient of the first signal divided by the second signal.
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