Ball rotation amount measurement system

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United States of America Patent

PATENT NO 11125559
APP PUB NO 20200103230A1
SERIAL NO

16496003

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A ball rotation amount measurement system which includes a magnetic sensor fixed to a ball to measure geomagnetism in at least one axis direction, and a computation unit configured to compute the rotation amount of the ball using data of a large number of the geomagnetism time-sequentially acquired by the magnetic sensor. The computation unit includes a difference data calculation unit configured to calculate a difference between two of the time-sequential geomagnetic data to thereby time-sequentially obtain a large number of difference data, a difference waveform calculation unit configured to determine a difference waveform that represents a time variation waveform of a large number of the difference data, and a rotation amount calculation unit configured to calculate the rotation amount of the ball, based on information of zero cross points at which the difference waveform crosses a straight line indicating zero-difference within a predetermined period.

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Patent Owner(s)

  • AICHI STEEL CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mori, Masaki Aichi, JP 144 939
Urakawa, Kazuo Aichi, JP 5 11
Yamamoto, Michiharu Aichi, JP 154 696

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