Gas turbine engine tip clearance sensors

Details Gas turbine engine tip clearance sensors Gas turbine engine tip clearance sensors

1990-03-01

1992-08-18

Stephan, Steven L.

Electricity: electrical systems and devices

Discharging or preventing accumulation of electric charge

361231, 324660, 324662, 324684, H05F 100

Patent

active

051404940

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.

REFERENCES:
patent: 4063167 (1977-12-01), Duly
patent: 4388667 (1983-06-01), Saurenman
patent: 4618909 (1988-10-01), Sanders
patent: 4630167 (1986-12-01), Huggins
patent: 4806848 (1989-02-01), Demers
patent: 4823071 (1989-04-01), Ding et al.
patent: 4878149 (1989-10-01), Stiehl et al.
patent: 4980796 (1990-12-01), Huggins

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