| 摘要 |
A magnetic position detector includes a soft magnetic target wheel, a magnetic sensor and a permanent magnet. The invention includes magnetoresistive sensors in several geometrical configurations of the target wheel, the sensor and the magnet. All configurations result in a big change of direction of the magnetic field at the location of the sensor as a result of a rotation of the target wheel. The configurations have in common that the direction of the magnetic field at the location of the sensor, as generated by the permanent magnet, is predominantly in the plane of the sensor surface, both when the sensor is next to a slot and next to a tooth of the target wheel, the surface of the sensor being substantially normal to the direction of movement of the target wheel. |
