Method and apparatus for measuring rotor unbalance
US6904371B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2003 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Apr 29, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M13/028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and related system for measuring rotor unbalance comprises rotating a rotor about an axis at a range of rotating speeds; generating a reference signal indicative of the instantaneous rotational frequency of the rotor; detecting the vibration of the rotor while the rotator is rotating, and generating a vibration signal; filtering the vibration signal, using the reference signal, to provide a synchronous vibration signal having a frequency equal to the instantaneous rotational frequency of the rotor; recording a vibration vector, the vibration vector comprising amplitude and phase values for the synchronous vibration signal; and measuring rotor unbalance based upon the vibration vector. Measurement accuracy can be improved by recording vibration vectors for a plurality of rotations of the rotor, and determining an average vibration vector. Methods and systems for detecting a rotor anomaly are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.