| 摘要 |
A fixed sensor has two sensing elements delivering sinusoidal signals GAMMA , and is mounted in front of the magnetized face of an annular multipolar encoder. The axis ( delta C) of the sensor (5) having the centers of the two sensing elements (51 and 52) is located at a distance (R0) from the axis ( delta R) of rotation of the encoder (4), and the encoder (4) has on its magnetized face (6) 2 m magnetic transitions between poles of opposite polarities, north and south, in the form of spirals, whose tracing is obtained by successive rotations by angles pi /m of the first transition around the center (0) of the encoder, defined in polar coordinates ( mu , theta ) by the equations:
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