Patent ID: 7791332

Claim:
System for determining the position of a mobile element in relation to a fixed structure, said system comprising: an encoder designed to be solidly attached to the mobile element in order to move together with the latter, said encoder being arranged to emit a pseudo-sinusoidal signal that represents the position of the encoder; a sensor designed to be solidly attached to the fixed structure, said sensor comprising: at least two resistive elements each capable of delivering a signal V i according to the pseudo-sinusoidal signal emitted, said resistive elements being disposed at read range from the pseudo-sinusoidal signal emitted by the encoder; a current loop assembly for connecting the resistive elements in series; a processor for processing the signals V i and for supplying, according to the signals V i , a SIN signal and a COS signal in quadrature and with the same amplitude; a calculator for calculating the position of the mobile element, said calculator comprising means for calculating the position of the encoder from the SIN and COS signals so at to deduce the position of the element from the calculated position of the encoder.