Magnetic rotary sensor

Details Magnetic rotary sensor Magnetic rotary sensor

H - Electricity

03

M

340/135.6

H03M 1/24 (2006.01) G01D 5/12 (2006.01) G01D 5/245 (2006.01) H03M 1/14 (2006.01) H03M 1/30 (2006.01)

Patent

CA 1263888

Abstract A magnetic rotary sensor has a rotary drum carrying magnetically recorded codes representative of discrete positions obtained by dividing one rotation of the drum into a predetermined number of portions. An interval between adjacent discrete positions identified by the codes is interpolated by interpolation signals generated on the basis of a sine wave signal and a cosine wave signal that are so produced by magnetic signals additionally recorded on the drum that the periods thereof correspond to the interval. As a result, a magnetic rotary sensor can be obtained that is capable of identify- ing the rotational positions of a rotatable body with the high resolution but without increasing the size of the rotary drum.

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