| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rotational sensor which is easy to assemble and reducible in cost. SOLUTION: This rotational sensor 10 has a nonmagnetic conductor 2b which is arranged in the circumferential direction, a 1st rotor 2 and an exciting coil which are fitted to a 1st shaft, a fixed core 3 which is fixed to a fixed member radially at an interval with the 1st rotor, a body 8a which is cylindrically molded out of an insulating magnetic material, and a nonmagnetic conductor layer 8b which is arranged in the circumferential direction on the body opposite the nonmagnetic conductor and is equipped with a 2nd rotor 8 which is arranged radially at a specific interval with the 1st rotor and fitted to a 2nd shaft rotating relatively to the 1st shaft, and the rotational sensor 10 detects the rotational angles of both the shafts or the angle of their relative rotation according to the inductance of the exciting coil which varies by the relative rotation between the 1st and 2nd rotors 2 and 8. The 1st and 2nd rotors 2 and 8 are assembled rotatably within a specific angle from one direction.</p> |
