Magnetic sensor having a high resolution track with magnets of varying dimensions and a low resolution track

摘要

A sensing apparatus includes first and second magnet assemblies. The first magnet assembly includes first and second magnets that have respective first and second opposite magnetic fields. The first magnet has a plurality of dimensions including an inner circumferential dimension, an outer circumferential dimension, an inner axial dimension, an outer axial dimension, and a radial dimension, and the second magnet has a corresponding plurality of dimensions. The inner circumferential dimension or outer circumferential dimension of the first magnet is relatively smaller than the corresponding dimension of the second magnet. A second magnet assembly is positioned at a distance from the first magnet assembly and includes a third magnet having a third magnetic field opposite to the first magnetic field. The first magnet assembly is a high-resolution track, and the second magnet assembly is a low-resolution track.

主权项

1. A sensing apparatus comprising:
a first magnet assembly including
first and second magnets having respective first and second opposite magnetic fields;wherein the first magnet has a plurality of dimensions including an inner circumferential dimension, an outer circumferential dimension, an inner axial dimension, an outer axial dimension, and a radial dimension, and the second magnet has a corresponding plurality of dimensions, and wherein the inner circumferential dimension or outer circumferential dimension of the first magnet is relatively smaller than the corresponding dimension of the second magnet; and a second magnet assembly positioned at a distance from the first magnet assembly, the second magnet assembly including
a third magnet having a third magnetic field opposite to the first magnetic field;wherein the first magnet assembly is a high-resolution track, and wherein the second magnet assembly is a low-resolution track.