Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1990-05-29
1992-03-31
Wieder, Kenneth A.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324681, 324690, G01R 2726
Patent
active
051011654
ABSTRACT:
In a hot gas turbine engine a capacitive probe clearanceometer is employed to measure the clearance gap or distance between the continuous surface of a compressor or turbine wheel such as, for example, a shroud ring turbine and its confining casing under operating conditions. The probe positions a capacitor electrode at the inner surface of the casing adjacent the continuous surface path. Electrical power is supplied to the probe through an oscillator having a tuned circuit in which the probe is a component. A high frequency signal of the oscillator is amplitude modulated by changes in electrical capacitance between the probe capacitor electrode and the passing continuous surface. The modulated oscillator signal is processed to provide an electrical signal which is proportional to the distance between the casing and the continuous surface. A preferred combination of high temperature and contamination resistant metal and ceramic materials are combined in an improved gas tight braze sealed probe tip.
REFERENCES:
patent: 2842738 (1958-07-01), Warnick
patent: 3593127 (1971-07-01), Lucka
patent: 3826980 (1974-07-01), Deichelmann et al.
patent: 4063167 (1977-12-01), Duly
patent: 4329644 (1982-05-01), Libertini et al.
patent: 4551785 (1985-11-01), Kroner
patent: 4568873 (1986-02-01), Oyanagi et al.
patent: 4804905 (1989-02-01), Ding et al.
patent: 4806848 (1989-02-01), Demers
patent: 4813273 (1989-03-01), Parsons
patent: 4818948 (1989-04-01), Dooley
patent: 4918376 (1990-04-01), Poduje et al.
Electronics, p. 147, May 1953.
General Electric Company
Mueller Robert W.
Shay Bernard E.
Squillaro Jerome C.
Wieder Kenneth A.
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