Device for detecting the position of a mobile target

A device to detect at least the position of a mobile target equipped with at least one pattern and mounted so as to define a magnetic gap in which are placed at boot two probes that are sensitive to intensity of a physical magnitude where, for each passage of a pattern in front of the at least two probes, movement of the target causes a variation in the intensity of the physical magnitude detected by the at least two probes, the at least two probes deliver at least two electrical output signals that are a function of the amplitude of the physical magnitude, and are applied to an input of processing resources, wherein the processing resources include:

• resources to produce an offset value of;
• resources for the determination of a first signal known as an absolute signal Sa, obtained from at least one of the at least two output signals;
• wherein the absolute signal takes the following form:
• Sa=n1·S1+n2·S2+ . . . +nx·Sx−Of
• where n1 to nx are gain coefficients equal to or greater than 0, and at least one of these coefficients is other than zero;
• and S1 to Sx are the at least two output signals;
• resources for the determination of a second signal, known as a differential signal, obtained from a difference between the at least two output signals;
• and
• resources for comparison between the absolute signal and the differential signal, the comparison delivering a binary signal representing at least the position of the mobile target.