| 摘要 |
The invention relates to a torque sensor of non-contact type which can measure the torque of a shaft (20) with a sufficient S/N ratio while under the influence of magnetic external noise. The torque sensor (131,132) detects the torque of a rotatable shaft (20) and comprises a pair of magnetic materials provided on a circumferential portion of the peripheral surface of the shaft, a pair of magnetic detectors disposed at opposite locations where they are influenced by external magnetic fields having opposite phase in non-contact around the shaft, and for detecting the variations of the magnetic characteristics of the magnetic materials, and a signal processing circuit producing a mean value of output signals obtained from the magnetic detectors. |
