| 摘要 |
<p>A position determining apparatus including a magnet (12) that is attached to a movable member which moves along a predefined path of finite length. An array of magnetic field transducers (22) are located adjacent to the predefined path. The transducers (22) provide a bipolar output signal as the magnet approaches, passes and moves away from each transducer. A correction mechanism is provided to correct for residual error caused by the non-linearity of the transducers. The correction mechanism preferably approximates the residual error with a predetermined function, and applied correction factors that correspond tot he predetermined function to offset the residual error. By correcting for the non-linearity of the transducers, the length of the magnet may be reduced and/or the spacing of the transducers may be reduced. <IMAGE></p> |
