Abstract
Methods are presented by which the sensitivity of magnetic head type torque sensors can be maximized. The magnetic head type torque sensors employ an inductance bridge to detect the difference in self-inductances of a pair of magnetic heads faced to the shaft through an air gap. Parameters of the bridge circuit and a phase-sensitive-detector are optimized for a given pair of magnetic heads based on the phase diagram consideration. The methods are applied to the torque sensors using newly developed thin magnetic heads. Parameters predicted by the methods are confirmed to be well close to those obtained experimentally.
