Rotational angle detecting apparatus, torque detecting apparatus and steering apparatus
First Claim
1. A rotational angle detecting apparatus comprising:
- rotating member;
one or more first targets provided on said rotating member;
first detecting means, disposed opposite to said first targets, for outputting a detection signal as said rotating member rotates; and
second detecting means for outputting a detection signal having a phase different from that of the detection signal of said first detecting means, whereby an absolute rotational angle of said rotating member is detected on the basis of the detection signals outputted by said first detecting means and said second detecting means, comprising;
second targets, the number of which is prime to the number of said first targets, provided on said rotating member or other rotating members rotating coaxially with said rotating member;
third detecting means, disposed opposite to said second targets, for outputting a detection signal as the rotating member rotates; and
fourth detecting means for outputting a detection signal having a phase different from that of the detection signal of said third detecting means;
wherein the absolute rotational angle of said rotating member is detected on the basis of the detection signals outputted by said first detecting means, said second detecting means, said third detecting means and said fourth detecting means.
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Accused Products
Abstract
A rotational angle detecting apparatus wherein one or more first targets 3a are provided on a steering shaft 13 so that first detecting means 1A outputs a detection signal as the steering shaft 13 rotates, second detecting means 1B outputs a detection signal having a phase different from that of the detection signal of the first detecting means 1A, and the rotational angle of the steering shaft 13 is detected on the basis of the detection signals outputted by the first detecting means 1A and the second detecting means 1B. A rotational angle detecting apparatus further comprising second targets 3b, the number of which is prime to the number of the first targets 3a, provided on the steering shaft 13, third detecting means 3A, disposed opposite to the second targets 3b, for outputting a detection signal as the steering shaft 13 rotates, and fourth detecting means 3B for outputting a detection signal having a phase different from that of the detection signal of the third detecting means 3A, wherein the rotational angle of the steering shaft 13 is detected on the basis of the detection signals outputted by the first to fourth detecting means 1A, 1B, 3A and 3B, thereby being capable of detecting an absolute rotational angle.
14 Citations
20 Claims
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1. A rotational angle detecting apparatus comprising:
- rotating member;
one or more first targets provided on said rotating member;
first detecting means, disposed opposite to said first targets, for outputting a detection signal as said rotating member rotates; and
second detecting means for outputting a detection signal having a phase different from that of the detection signal of said first detecting means, whereby an absolute rotational angle of said rotating member is detected on the basis of the detection signals outputted by said first detecting means and said second detecting means, comprising;second targets, the number of which is prime to the number of said first targets, provided on said rotating member or other rotating members rotating coaxially with said rotating member;
third detecting means, disposed opposite to said second targets, for outputting a detection signal as the rotating member rotates; and
fourth detecting means for outputting a detection signal having a phase different from that of the detection signal of said third detecting means;
whereinthe absolute rotational angle of said rotating member is detected on the basis of the detection signals outputted by said first detecting means, said second detecting means, said third detecting means and said fourth detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- rotating member;
Specification