| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrain effects due to disturbance and rotational dependence, and accurately detect torque. Ž<P>SOLUTION: An output side cylinder 22 is provided with a reference slit 61, and an input side cylinder 21 is provided with a first detection slit 62 and a second detection slit 63, which overlap the reference slit 61, the overlap amount between the first detection slit 62 and the reference slit 61 changing inversely with the overlap amount between the second detection slit 63 and the reference slit 61, in response to the torsion of a torsion bar 10, magnetic flux is applied from the inner side of the input side cylinder 21 by a first drive coil 31 and a second drive coil, a measuring circuit 50 calculates a phase difference between a phase of a detection signal for detecting the magnetic flux by a first detection coil 41 provided on a position facing to the first detection slit 62 on the outer side of the output side cylinder 22, and a phase of a detection signal by a second detection coil 42 provided on a position facing to the second detection slit 63 on the outer side of the output side cylinder 22, and a torsion amount of the torsion bar 10 is calculated. The directions of the magnetic flux generated by the first drive coil 31 and second drive coil are opposite to each other. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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