Gas turbine engine tip clearance sensors
US5140494A · kind A · utility
23Cited by
8References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1990 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Mar 1, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention provides a means for restoring the output waveform of a DC capacitive tip clearance sensor 26 which has been effected by electrical noise in an ion rich environment such as for example a gas turbine engine turbine section 16. The means comprises a pair of electrodes 28,30 each of which is polarized to either a high positive or a high negative potential. The probes 28,30 are situated upstream of the sensor 26 and act to remove any charge carriers from the gas stream before the gas reaches the sensor 26. The sensor 26 may then operate without experiencing undesirable fluctuations in its voltage output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.