APPARATUS FOR SENSING ROTATING DEVICE
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United States of America
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Issued Date -
Mar 19, 2020
app pub date -
May 22, 2019
filing date -
May 22, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus for sensing a rotating body includes a unit to be detected, including a first pattern portion having at least one first pattern and a second pattern portion having at least one second pattern, and configured to rotate around a rotating shaft, a sensor module comprising a first sensor disposed opposite to the first pattern portion and a second sensor disposed opposite to the second pattern portion, and a rotation information calculator configured to calculate a difference value by differentiating output signals of the first sensor and the second sensor, and to compare comparison values, determined according to a target sensing angle and a size of the first pattern and the second pattern, with the difference value.
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