| 摘要 |
The sensor device accurately measures small angle changes of mechanical parts that rotate relative to each other. The sensor device includes only one cylindrical magnet (3) extending axially from a first part; two magnetoresistive sensors (5',5'') mounted on a second part and located in the magnetic field of the sole magnet (3), the two magnetoresistive sensors having respective magnetic field sensitive layers (MS) facing a magnetic pole of the magnet (3), extending tangentially to a rotation direction in which the parts rotate relative to each other and generating respective output signals according to magnetic field line direction; and a device (PT) for combining the respective output signals of the two magnetoresistive sensors (5',5'') to produce a combined output signal characteristic of the relative rotation angle of the parts. The combined output signal is set to zero when the parts are at a predetermined relative rotation angle.
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