| 摘要 |
<p>When an electrical submersible pump motor runs, rotary vibrations occur in the same direction as the rotation of the motor. This vibration can be detected by an XY vibration sensor. Depending on the rotation direction, the vibration along the X-axis will be out of phase +90 degrees or -90 degrees with the vibration in the Y-axis. To determine the rotation direction, the vibration sensor measures a vibration of an ESP pump in two axes, recording first and second vibration signals. Next, whether the first signal either leads or lags the second signal is determined by, for example, comparing correlations of the first and second signal with the second signal shifted by plus and minus one-fourth of the period of rotation. Then a direction of a rotation of the electrical submersible pump can be determined responsive to the determination of whether the first signal either leads or lags the second signal.</p> |
