ROTATION ANGLE DETECTOR WHICH CAN DETECT ENTRY OF FOREIGN SUBSTANCES
First Claim
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1. A rotation angle detector comprising:
- a rotating body including a plurality of track parts to detect a rotation angle of a rotary shaft;
detection units arranged in positions which correspond to the track parts; and
an abnormality detecting unit for detecting an abnormality based on signals generated in the detection units, whereinthe rotating body includes a first track part and a second track part,the detection units generate a first signal based on the first track part and a second signal based on the second track part, andthe abnormality detecting unit includes a fluctuation range calculating unit for calculating a fluctuation range of the first signal and a fluctuation range of the second signal, and a judgement unit for judging an occurrence of an abnormality when a difference between the fluctuation range of the first signal and the fluctuation range of the second signal is larger than a predetermined fluctuation range judgement value.
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Abstract
A rotation angle detector comprises a rotating body including a plurality of track parts, and an abnormality detecting unit for detecting an abnormality based on signals generated in detection units. The detection units generate a first signal based on a first track part and a second signal based on a second track part. The abnormality detecting unit includes a judgement unit for judging an occurrence of an abnormality when the difference between the fluctuation range of the first signal and the fluctuation range of the second signal is larger than a predetermined fluctuation range judgement value.
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3 Claims
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1. A rotation angle detector comprising:
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a rotating body including a plurality of track parts to detect a rotation angle of a rotary shaft; detection units arranged in positions which correspond to the track parts; and an abnormality detecting unit for detecting an abnormality based on signals generated in the detection units, wherein the rotating body includes a first track part and a second track part, the detection units generate a first signal based on the first track part and a second signal based on the second track part, and the abnormality detecting unit includes a fluctuation range calculating unit for calculating a fluctuation range of the first signal and a fluctuation range of the second signal, and a judgement unit for judging an occurrence of an abnormality when a difference between the fluctuation range of the first signal and the fluctuation range of the second signal is larger than a predetermined fluctuation range judgement value. - View Dependent Claims (2, 3)
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Specification