DISPLACEMENT DETECTOR AND MACHINE HAVING DISPLACEMENT DETECTOR
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United States of America Patent
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Issued Date -
Jan 3, 2008
app pub date -
Jun 11, 2007
filing date -
Jun 12, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A gyro sensor is secured to a machine tool. When the machine tool is displaced, the gyro sensor detects rotation of the machine tool. The machine tool has a rotation detecting unit. Based on rotation data obtained by the gyro sensor, the rotation detecting unit determines whether the machine tool has been displaced. If the maximal rotation angle of the machine tool exceeds a predetermined value, the rotation detecting unit determines that the machine tool has been displaced. The rotation detecting unit has history data of the rotation angle recorded in a period from the time at which detection of the rotation angle of the machine tool is started to the time at which such detection is ended. The rotation detecting unit determines whether the machine tool has been displaced using the history data.
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