Vibration sensing in gas turbine engine
US6445995B1 · kind B1 · utility
35Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 26, 2001 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Jan 26, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/481
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vibration detector. A machine, such as a gas turbine engine, contains a rotor bearing and a gear. A nearby sensor produces a train of pulses as teeth of the gear travel past. The frequency of the pulse train indicates rotational speed of the rotor. In addition, vibration of the rotor causes the gear to orbit about another center. The orbiting causes amplitude modulation, frequency modulation, or both, in the pulse train. Detection of the modulation indicates the presence of vibration. Thus, a single pulse train, produced by a single sensor, is used to indicate both speed, and the presence of vibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.