Apparatus and method for analyzing the condition and performance of turbomachines by processing signals representing rotor motion
US5686669A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 29, 1996 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Feb 29, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H1/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and device for processing encoder signals from turbomachines to produce frequency modulation signals representing fully isolated rotor vibrational resonances. Multi-sensor and multi-sideband group processing provides enhanced results. The method provides dramatically improved frequency resolution. Amplitude modulation and random noise effects are removed by a variety of artifact-free techniques. Signals then are completely separated into components for rotational vibration and translational vibration. Fully isolating rotational vibration unmasks previously undetectable signal components of diagnostic value. In cases of high background vibration, Wiener filtering removes the effects of exogenous vibration. By these various techniques, the present invention provides significantly enhanced diagnostic information regarding condition and performance in turbomachines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.