Caracterización de Imanes para aplicación en sistemas de sensado de posición.

This paper reports the characterization of a set of Neodymium magnets with different sizes and geometries, which is devoted to determine the influence of the former parameters both in the magnitude as direction of the magnetic field produced in: a) points near but not on an symmetry axis of the magnet and b) points placed along the symmetry axis of the magnet to different distances from it. Characterization was performed with a Hall Effect sensor, which was accompanied of a conditioning signal circuit, which allows obtaining an output voltage proportional to the magnetic flux density present in the sensing region. The signal given by the sensor allows to measure not only the magnitude of the magnetic field present in the sensing region but the orientation of the magnetic field lines in that region through the sign of the induced Hall voltage. The results of the measurements suggest some criteria for choosing the most convenient type of magnet for application in sensing of the position of magnetized objects, or objects which contain that type of magnets inside, as well as give tracks to prevent overlapping errors in the determination of the position of multiple neighboring magnets or objects which contain that type of magnets [ABSTRACT FROM AUTHOR]