Patent ID: 11946773
Assignee: DENSO CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. A detection device comprising:
a rotation detection unit configured to continue detection of a rotation position of a rotor as a detection object; and
a count calculator configured to calculate a count value, which divides one rotation of the detection object by an integer of 1 or more, either counted up or down according to a rotation direction by n times during one rotation of the detection object, where n is the integer of 1 or more, wherein
the count calculator is configured to count, as a count value, a number m between a lower limit value and an upper limit value, where m is an integer of 2n or more, the count value either (i) set to the lower limit value next time the count value is counted up after reaching the upper limit value or (ii) set to the upper limit value next time the count value is counted down after reaching the lower limit value,
the detection device further comprises, in a multiple rotation position calculator,
a first multiple rotation position calculator configured to calculate multiple rotation position information based on a detection value of a multi-turn detection unit, which is configured to continually detect a rotation position of multiple rotations of a detection object without supply of electric power from outside, and
a second multiple rotation position calculator configured to calculate the multiple rotation position information based on a detection value of the position detector, which is configured to detect the rotation position in one rotation of the detection object,
wherein the first multiple rotation position calculator and the second multiple rotation position calculator are provided as a heterogeneously-redundant configuration for the calculation of the multiple rotation information, and
electric power is constantly supplied to the position detector and the second multiple rotation position calculator respectively providing a detection value for the calculation of the multiple rotation position information.