Patent ID: 8624586

Claim:
A Hall effect measuring device under the hood of a motor vehicle, the device comprising: a housing ( 30 ), a Hall effect sensor ( 1 ) comprising a holed magnet ( 10 ) and a chip ( 20 ) arranged at the Gaussian zero point of said magnet ( 10 ), a ferromagnetic target ( 50 ) comprising a measurement surface ( 51 ), and a reference position corresponding to a given relative position of the chip ( 20 ) and of the target ( 50 ), wherein, the chip ( 20 ) is securely attached to the magnet ( 10 ), and defines a measurement plane ( 21 ), the Hall effect sensor ( 1 ) and the ferromagnetic target ( 50 ) are movable with respect to each other and are able to be imparted with a relative motion with respect to one another, the sensor ( 1 ) is positioned in said housing ( 30 ) and configured to measure the value of the magnetic field (B) of the magnet ( 10 ), vertically in line with the chip ( 20 ), on a measurement axis (Z) perpendicular to the measurement plane ( 21 ), the Hall effect sensor ( 1 ) is linear, the relative motion between the Hall effect sensor ( 1 ) and the ferromagnetic target ( 50 ) is with two degrees of freedom, a first degree of freedom corresponding to a translational motion and a second degree of freedom corresponding to a rotational motion, the device is configured to detect a deviation from the reference position, at least one of the shape and the dimension of the target ( 50 ) according to a first relative translational motion is different respectively from the at least one of the shape and the dimension of the target ( 50 ) according to a second relative rotational motion.