Patent ID: 8076932

Claim:
A device for measuring the position of at least a first moving part ( 4 ; 62 ; 64 , 102 ), this device comprising: at least a first generator ( 8 ; 66 ; 108 ) for generating a first magnetic field to be measured, this first generator being fastened to the first moving part; at least one magnetic core providing means for capable of modulating the amplitude of an excitation magnetic field (H ex ) as a function of the amplitude of the first magnetic field to be measured, this magnetic core having a magnetic induction cycle as a function of the magnetic field with no hysteresis within an operating range [H min ; H max ]; and an electronic computer ( 44 ) providing means for determining the position of the first moving part relative to the magnetic core from the amplitude of a magnetic field induced in the magnetic core, this induced magnetic field resulting from the combination of the magnetic field to be measured and the excitation magnetic field, in which the magnetic cycle of the magnetic core ( 10 ; 110 - 113 ) is characterized in that the absolute value of the third derivative of the magnetic induction with respect to the magnetic field is a maximum for a zero magnetic field.