ROTATION DETECTION DEVICE AND METHOD FOR DETECTING ROTATION
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United States of America Patent
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Issued Date -
Aug 12, 2021
app pub date -
Jan 22, 2021
filing date -
Feb 10, 2020
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Abstract
A rotation detection device to solve the above-described problems includes: accelerometers installed to be spaced apart from each other at predetermined pitches around a rotating shaft of a rotary machine, the accelerometers detecting rotation vibration of the rotary machine and outputting vibration signals; and a signal processing unit that acquires the vibration signals from the accelerometers. The signal processing unit includes: an installation information acquisition means for acquiring installation radii of the accelerometers with respect to the rotating shaft; an analysis processing means for acquiring frequency responses and coherences for the vibration signals; a determination means for determining whether or not the coherences are greater than a predetermined threshold value; and a rotation period calculation means for calculating a rotation period of the rotating shaft from the frequency, the phase difference, the predetermined pitch, and the installation radii.
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