| 摘要 |
PROBLEM TO BE SOLVED: To provide a detecting apparatus eliminating steps in a detection signal by calculating and correcting the detection signal output in response to the rotor. SOLUTION: The detecting apparatus comprises one or more targets (not shown) mounted on a rotor (not shown), a plurality of detecting means (not shown) facing the targets and outputting detection signals having different phases in accordance with the position of the targets as the rotor rotates, and a switching means (S2) switching the detecting means. The apparatus detects a rotation angle of the rotor based on a detection signal of the detecting means after a switch by the switching means (S2). The apparatus further comprises a first calculating means (S12) calculating a difference of a detection signal of each detecting means between immediately before and immediately after switching by the switching means (S2) and a correcting means (S8) correcting the detection signal of the detecting means after switching using the difference calculated by the first calculating means (S12). The rotation angle is detected based on the detection signal corrected by the correcting means (S8). COPYRIGHT: (C)2004,JPO |
