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Abstract

A method for determining position and/or direction of a target, where the target has a series of magnetic poles with a magnetic pole spacing d. The method includes the steps of: (A) providing an array of an even number N of magnetic sensors with a sensor spacing x, the sensor array having an initial effective sensor array length (N+1)x, where the initial effective sensor array length is greater than the pole spacing d; (B) deactivating an equal number of magnetic sensors such that the magnetic sensors of the array remaining active are adjacent to each other and provide a new effective sensor array length that is closer to the pole spacing d than the initial effective sensor array length; (C) dividing the magnetic sensors of the array remaining active into two equal groups A and B of at least one adjacent magnetic sensor for signal processing; (D) summing the signals from group A and summing the signals from group B; (E) adding the summation of signals from group B to the summation of signals from group A to obtain a sine wave; and (F) subtracting the summation of signals from group B from the summation of signals from group A to obtain a cosine wave.

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First Claim