| 摘要 |
The invention relates to a sensor comprising at least one rotary magnetic encoder of the type comprising at least one circular magnetic track (2<SB>i</SB>) formed by a series of elements (5) for generating a varying magnetic field, the elements being distributed to form P pairs of elements at a mechanical period (T) equal to 360{/P, the magnetic track being designed to travel past at least one detector cell (3<SB>i</SB>) delivering a periodic electrical signal corresponding to variation in the intensity of the magnetic field generated by the elements. According to the invention, the encoder comprises either a set of <U>n</U> circular magnetic tracks (2<SB>i</SB>) each being designed to travel past a respective detector cell (S<SB>i</SB>) and mounted in such a manner that said elements (5) of the tracks are mutually angularly offset, or else a circular magnetic track for travelling past <U>n</U> detector cells that are angular offset relative to one another, the relative angular offset between the generator elements and the cells being adapted to obtain <U>n</U> electrical signals (S<SB>i</SB>) that are electrically phase-offset relative to one another by a value equal to 1/2n times the value of the period (T), thereby enabling the resolution to be increased by <U>n</U> times. |
