Abstract

There are many requirements for measuring torque, such as non-contact with the shaft, small size of the measurement device, and simple installation. Other requirements include no special processing in the shaft and cost-effectiveness. Therefore, we have proposed a magnetostrictive-type torque sensor for a steering shaft using an inverse magnetostrictive effect.Generally, a magnetostrictive-type torque sensor for a low-carbon steel shaft has a large hysteresis to the torque and output fluctuation due to axis rotation. With this sensor, we have shown that the hysteresis on the output voltage can be drastically decreased, if the magnetic shaking method is applied.

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