| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for correcting detection torque of magnetostrictive torque sensors capable of correcting errors due to regular irregularities even in the case it is not possible to grasp a zero point. SOLUTION: The torque sensor 1 detects changes in the magnetic field of a magnetostrictive ring 11 mounted to a shaft 10 by a magnetic sensor 12, outputs them to a control unit 13, and determines torque exerted on the shaft 10. Regular irregularities have occurred in the torque sensor 1. For removing the regular irregularities, both the number of revolutions of the shaft 10 and a torque variation component detected by the magnetic sensor 12 are supplied to a resonance circuit. A regular irregularity component is extracted from the torque variation component at the resonance circuit, and the regular irregularity component is removed to correct detection torque detected by the torque sensor 1. COPYRIGHT: (C)2005,JPO&NCIPI
|
