| 摘要 |
<p>The device comprises an assembly of two magnetic field sensors (1a, 1b), each of which comprises a number of magnetoresistive sensor elements (3) which are situated in one plane and which have the same privileged directions of magnetization (5), said sensor elements being connected on the one side to a power supply circuit (9) and on the other side to a signal processing circuit (11), the privileged directions of magnetization of the sensor elements of different magnetic field sensors being different, said assembly of magnetic field sensors being arranged within a magnetization coil (13) which is formed as an electric conductor which extends around a central axis (27) in a number of turns and which is arranged to generate an auxiliary magnetic field extending parallel to the central axis, the magnetic field sensors being arranged within the magnetization coil in such a manner that the angle enclosed by the central axis relative to the normal to the plane of the sensor elements is the same for each of the magnetic field sensors and that the auxiliary magnetic field at the area of each of the magnetic field sensors contains a component which extends parallel to the privileged direction of magnetization of the sensor elements of the relevant magnetic field sensor. The sensor part formed by the magnetic field sensors (1a, 1b) and the magnetization coil (13) is particularly small and light because the two magnetic field sensors (1a, 1b) are arranged in such a manner that their sensor elements (3) are situated in the same plane or in mutually parallel planes and the privileged directions of magnetization(5a, 5b) of the sensor elements extend mutually perpendicularly and enclose an angle of 45° relative to the central axis (27).
</p> |
