Patent ID: 6727689
Filing Date: 2004-04-27
Classification: G01D,G01P

Abstract:
An apparatus for detecting gear features, the apparatus comprising:a magnetic sensing element providing a first signal indicative of the presence of a gear feature; a thresholding module operable to: (a) receive the first signal and responsively provide a second signal; (b) provide a reference signal; (b) detect a first difference between the second signal and the reference signal, and responsively provide a third signal as a function of the first difference; and (c) detect a second difference between the third signal and the reference signal, and responsively adjust the first signal (i) as a function of the second difference when the second difference falls below a given threshold and (ii) by a predetermined amount when the second difference satisfies the given threshold; and an output module operable to receive the reference signal and the second signal, and responsively produce an output signal as a function of a first and reference signals.