| 摘要 |
PROBLEM TO BE SOLVED: To provide a torque sensor capable of detecting a direction and size of torque in non-contact at high sensitivity without generating zero variation of output. SOLUTION: The torque sensor 10 detects the torque applied on a rotating shaft 90. Herein, magnetic cores of the same shape are installed over two parts four by four in a peripheral direction of the rotating shaft. The magnetic core 30 includes a back yoke part 31 and two leg-like yoke parts 32. An excitation inner peripheral coil 71 is wound in an outer peripheral direction of the rotating shaft 90 so as to pass the inside of each back yoke part 31, 41 and 51 by viewing from an axial direction of the rotating shaft 90. An excitation outer peripheral coil 72 is wound in an outer peripheral direction of the rotating shaft 90. A detection inner peripheral coil 81 is wound in parallel to the excitation inner peripheral coil 71. A detection outer peripheral coil 82 is wound in parallel to the excitation outer peripheral coil 72. COPYRIGHT: (C)2008,JPO&INPIT
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